CN109281613B - Rotary sealing device for water supply or gas supply system of drilling machine - Google Patents
Rotary sealing device for water supply or gas supply system of drilling machine Download PDFInfo
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- CN109281613B CN109281613B CN201811460289.XA CN201811460289A CN109281613B CN 109281613 B CN109281613 B CN 109281613B CN 201811460289 A CN201811460289 A CN 201811460289A CN 109281613 B CN109281613 B CN 109281613B
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- rotating shaft
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- assembly
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- 238000007789 sealing Methods 0.000 title claims abstract description 107
- 238000005553 drilling Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000002826 coolant Substances 0.000 claims description 32
- 230000000712 assembly Effects 0.000 claims description 14
- 238000000429 assembly Methods 0.000 claims description 14
- 210000004907 gland Anatomy 0.000 claims description 10
- 230000007246 mechanism Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 18
- 230000008569 process Effects 0.000 abstract description 18
- 230000009471 action Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 238000005299 abrasion Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B12/00—Accessories for drilling tools
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Sealing (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a rotary sealing device for a water supply or gas supply system of a drilling machine, which comprises a rotating shaft, wherein a sleeve is arranged outside the rotating shaft, a sealing assembly is arranged between the rotating shaft and the sleeve, a compensating spring is assembled between a retaining ring outside the rotating shaft and the sealing assembly or between a press-fitting assembly and the sealing assembly, and an opening of the compensating spring faces towards the sealing assembly. The invention can automatically compensate the radial clearance under the action of the compensation spring after the seal assembly is worn in the working process, thereby leading the seal assembly to generate axial and radial deformation and achieving the sealing effect; meanwhile, the butterfly spring is compressed for multiple times by adjusting the locking nut, and the service life of the rotary sealing device can be prolonged by 5-7 times.
Description
Technical Field
The invention relates to a horizontal directional drilling machine and a full hydraulic drilling machine technology for geological drilling in the field of non-excavation construction technology, in particular to a rotary sealing device for a water supply or gas supply system of the horizontal directional drilling machine.
Background
The drilling of the horizontal directional drilling machine is extrusion type drilling, namely, the drilling mode is that the drill bit extrudes soil towards the radial periphery, and the soil cannot be discharged out of the ground, so that the resistance of the drill bit in the drilling process is very large, and the temperature of the contact surface of the drill bit and the ground is sharply increased due to the huge friction force between the drill bit and the ground, so that the metallographic structure of a drilling tool material is changed, the service performance of the drilling tool material is reduced, and the pore-forming quality and the pipe pulling quality of the drilling tool are influenced. Therefore, it is necessary to provide a pressure medium (such as high-pressure water or high-pressure gas) through a mud pump or a compressor to soften or transfer the stone soil barrier at the drilling site, and on the other hand, the mud or the pressure medium of the air compression system also plays a role in cooling the pilot bit and the drill rod, so as to prevent the performance change of the pilot bit due to high temperature from affecting the drilling capability of the drill bit. The conventional method is that a rotary sealing device is arranged at the tail end of a main shaft of a power head, the main function of the rotary sealing device is to input cooling liquid or cooling air into a drill rod to cool a drill bit, and the sealing performance of the rotary sealing device is directly related to the cooling and drilling effects of the drill bit, so that the use and construction quality of the whole set of equipment are related.
The general problem of the rotary sealing device who is used for the rig at present is that the ability of sealed high-pressure air or pressurized water is relatively poor, leads to high-pressure air or pressurized water to leak from rotatory pivot and sealing member easily in long-time rotatory dynamic use because of the wearing and tearing of sealing washer to cause the influence to equipment's normal work. Therefore, there is a need in the art for a solution to this problem.
Disclosure of Invention
The invention aims to provide a rotary sealing device for a water supply or gas supply system of a horizontal directional drilling machine, which aims to solve the problems in the background art.
In order to achieve the purpose, the invention provides a rotary sealing device for a water supply or gas supply system of a horizontal directional drilling machine, which comprises a rotating shaft 1, wherein a sleeve 2 is arranged outside the rotating shaft, and a sealing assembly 4 is arranged between the rotating shaft and the sleeve and is of a cylindrical structure. In the working process, the rotating shaft rotates along with the main shaft of the power head, the radial inner wall of the sealing assembly is a main wear surface, the inner wall of the sleeve is convexly provided with a retaining ring 24 on the axial inner side (namely, the side close to the cooling medium inlet 20) of the sealing assembly 4, the retaining ring 24 is used for directly or indirectly retaining the end face of one axial end of the sealing assembly 4, and the end face of the other axial end of the sealing assembly 4 is pressed by the press-fitting component.
The rotary sealing device further comprises a compensation spring 3, the compensation spring is sleeved outside the rotating shaft, the elastic direction of the compensation spring is arranged along the axial direction of the rotating shaft, and the compensation spring abuts between the check ring and the sealing assembly or between the press-fitting assembly and the sealing assembly.
The compensation springs and the sealing assembly parts are symmetrically arranged in two groups, one group of sealing assembly parts corresponds to one check ring, one group of compensation springs and one group of press-fitting assemblies, the two groups of sealing assembly parts are symmetrically distributed on two sides of the cooling medium inlet, one group of sealing assembly parts corresponds to one end, connected with the power head main shaft, of the rotating shaft, and the other group of sealing assembly parts corresponds to the other end of the rotating shaft.
The contact point between the compensating spring and the end face of the seal assembly should be located at a position close to the radially outer edge of the axial end face of the seal assembly, so that when the seal assembly with a certain amount of worn inner wall is subjected to axial pressing force, the deformation direction of the seal assembly is mainly inward along the radial direction (i.e. the direction from the outer wall to the inner wall), rather than random radial deformation, thereby compensating the wear of the radial inner wall of the seal assembly and prolonging the service life of the seal assembly.
The compensation spring is a common cylindrical spiral spring (see fig. 2), and the compression deformation direction of the seal assembly can be guided by setting the inner diameter of the cylindrical spiral spring to be close to the edge position of the end face of the seal assembly.
At least one of the two groups of press mounting components comprises an adjusting locking nut 67, the adjusting locking nut 67 is provided with an internal thread matched with the external thread of the rotating shaft 1, the adjusting locking nut is screwed on the rotating shaft, and the adjusting locking nut is directly or indirectly screwed on the rotating shaft along the axial direction to tightly press the compensating spring in the sleeve and the sealing assembly.
In the use process of the rotary sealing device, the abrasion of the sealing assembly is dynamically pressure-compensated by the elastic force provided by the compensation spring which is deformed by compression, so that the contact surface between the sealing assembly and the rotating shaft is always kept in a tight state, the process is an automatic compensation process, after a period of time, the inner wall of the sealing assembly is continuously abraded until the compression quantity of the two compensation springs is quickly released and the original shape is recovered, the pressure of the two compensation springs is gradually reduced, at the moment, the adjusting locking nut rotates towards the direction close to the sealing assembly, so that the compensation springs return to the compression state again, the sealing assembly can enter the automatic compensation process of the next round, the process is repeated for many times until the sealing assembly is completely failed, and the service life of the sealing assembly is about 5-7 times of the original service life.
The press-fitting component comprises a compensation block arranged on the axial outer side of the sealing assembly, the end face of the compensation block is used for directly or indirectly abutting against the sealing assembly, the thrust of the compensation block to the sealing assembly points to the axial inner side of the sealing assembly, the radial outer wall of the compensation block is provided with a step structure, and the inner wall of the sleeve is provided with a hole shoulder matched with the step structure of the compensation block.
The sleeve barrel middle part is equipped with coolant inlet 20, the position that the sleeve inner wall corresponds the coolant inlet is concave to be equipped with cyclic annular water course 21, the one end and the power head main shaft inner channel intercommunication of coolant circulation passageway 10, the other end of coolant circulation passageway is provided with four side through-holes 101, the position of four side through-holes all corresponds with cyclic annular water course 21, the pivot rotates to optional position, four side through-holes can both keep the state with coolant inlet 20 intercommunication, the width of cyclic annular water course is greater than the diameter of side through-hole 101, even if certain axial relative slip has taken place for sleeve and pivot, the side through-hole still can keep the state with coolant inlet 20 intercommunication.
The outer wall of the sleeve is provided with a joint 22 with internal threads at a cooling medium inlet, the joint 22 is used for connecting a pipeline connected from a pump or a compressor to introduce the cooling medium into the rotary sealing device, and the outer wall of the sleeve is provided with a rotation stopping plate 23 which is used for connecting a rotation stopping mechanism to prevent the sleeve from rotating.
The invention has at least the following beneficial effects:
the rotary sealing device is provided with the compensation spring which can enable the sealing assembly to realize automatic compensation, and the sealing assembly can always keep a close fit state with the radial outer wall of the rotating shaft in the working process, so that the sealing reliability in the construction process is effectively ensured.
In order to further ensure the sealing effect, a force contact point between the compensation spring and the end face of the sealing assembly is arranged at the edge position of the end face of the sealing assembly, so that the deformation direction of the sealing assembly is mainly inward along the radial direction instead of random radial deformation, the abrasion of the inner wall of the sealing assembly is compensated, and the service life of the sealing assembly is prolonged by 5-7 times.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a front sectional view of a rotary sealing device according to a preferred embodiment of the present invention (a cylindrical coil spring is used as a compensation spring).
Fig. 2 is an enlarged detail view of the rotary seal apparatus of the preferred embodiment of the present invention at the relief ring.
In the figure: 1-rotating shaft, 10-coolant flow channel, 101-side through hole, 11-connecting end, 2-sleeve, 20-coolant inlet, 21-annular water channel, 22-joint, 23-rotation stopping plate, 24-retainer ring, 241-retainer ring I, 242-retainer ring II, 25-bore shoulder I, 26-bore shoulder II, 3-compensation spring, 31-compensation spring I, 32-compensation spring II, 4-sealing assembly, 41-sealing assembly I, 42-sealing assembly II, 5-press-fitting assembly I, 51-compensation block I, 52-support bearing I, 53-press-cover I, 54-dust-proof ring, 6-press-fitting assembly II, 61-compensation block II, 62-support bearing II, 63-isolating ring, 64-a second gland, 65-a thrust bearing, 66-a baffle ring, 67-an adjusting locking nut, 7-a pressure reducing ring, 71-a first pressure reducing ring, 72-a second pressure reducing ring, 8-a secondary sealing ring, 81-a first secondary sealing ring and 82-a second secondary sealing ring.
Detailed Description
Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Referring to fig. 1-2, the rotary sealing device for the water supply system of the horizontal directional drilling machine comprises a rotating shaft 1 used for connecting a power head main shaft of the horizontal directional drilling machine, a cooling medium circulation channel 10 is arranged inside the rotating shaft 1 along the axial direction, an outlet of the cooling medium circulation channel 10 corresponds to a connecting end 11 of the rotating shaft used for connecting the power head main shaft, a sleeve 2 is sleeved outside the rotating shaft, and a cooling medium inlet 20 is arranged in the middle of a sleeve barrel.
A sealing assembly 4 is arranged between the rotating shaft and the sleeve, the sealing assembly is of a cylindrical structure, the rotating shaft rotates along with the power head main shaft in the working process, the inner wall of the sealing assembly is a main wear surface, a retainer ring 24 is arranged on the inner wall of the sleeve close to a cooling medium inlet, the retainer ring 24 is used for directly or indirectly blocking the end face of one axial end of the sealing assembly 4, and the end face of the other axial end of the sealing assembly 4 is pressed by a press-fitting assembly.
The rotary sealing device also comprises a compensation spring 3, the compensation spring is sleeved between the retainer ring outside the rotating shaft and the sealing assembly or between the press-mounting component and the sealing assembly, and the elastic direction of the compensation spring is arranged along the axial direction of the rotating shaft.
The compensation springs and the seal assemblies are symmetrically arranged in two groups, one group of seal assemblies corresponds to one group of compensation springs and one group of press-fitting assemblies, the two groups of seal assemblies are symmetrically distributed on two radial sides of the cooling medium inlet, one group of seal assemblies corresponds to one end (namely the left end of the rotating shaft in the figure 1) of the rotating shaft connected with the main shaft of the power head, and the other group of seal assemblies corresponds to the other end (namely the right end of the rotating shaft in the figure 1) of the rotating shaft.
The contact point between the compensating spring and the axial end face of the seal assembly should be located close to the radially outer edge of the seal assembly so that the seal assembly, which has a certain amount of wear on its inner wall, will deform in a direction that is primarily radially inward when subjected to an axially compressive force, rather than randomly radially, thereby compensating for the wear occurring on the inner wall of the seal assembly and extending the life of the seal assembly.
The compensation spring is a common cylindrical spiral spring (see fig. 1), and the inner diameter of the cylindrical spiral spring is set to enable the spring wire to be close to the edge position of the end face of the sealing assembly, so that the compression deformation direction of the sealing assembly can be guided.
In the invention, the press-fitting component, the compensation spring and the sealing assembly which correspond to one end of the rotating shaft and are connected with the main shaft of the power head are respectively defined as a first press-fitting component 5, a first compensation spring 31 and a first sealing assembly 41, and the press-fitting component, the compensation spring and the sealing assembly which correspond to the other end of the rotating shaft are respectively defined as a second press-fitting component 6, a second compensation spring 32 and a second sealing assembly 42.
The first press-fitting assembly comprises a first compensation block 51, a first support bearing 52 and a first gland 53, wherein the first compensation block 51, the first support bearing 52 and the first gland 53 are sleeved on the periphery of the rotating shaft and are located in the sleeve, the first gland 53 is fixed on the sleeve, and the first gland 53 axially compresses the first support bearing so as to compress the first compensation block 51, the first seal assembly 41 and the first compensation spring 31 which are located on the inner side of the first support bearing 52.
The second press-fitting assembly comprises a second compensation block 61, a second support bearing 62, an isolating ring 63, a second gland 64, a thrust bearing 65, a baffle ring 66 and an adjusting and locking nut 67; the second gland is fixed on the sleeve, and the second gland is provided with a second compensation block 61, a second support bearing 62, an isolation ring 63, a thrust bearing 65 and a baffle ring 66. The adjusting locking nut 67 is screwed on the rotating shaft, and the adjusting locking nut 67 is screwed on the rotating shaft along the axial direction to tightly press the second compensating spring 32 and the second sealing assembly 42 in the sleeve through the baffle ring 66, the thrust bearing 65, the isolating ring 63, the second supporting bearing 62 and the second compensating block 61. The first supporting bearing and the second supporting bearing can be ball roller bearings, the thrust bearing can be a thrust ball bearing, and the thrust bearing is used for improving the smoothness degree of the adjusting locking nut in the screwing process and is convenient to operate.
In the use process of the rotary sealing device, the abrasion of the first sealing assembly and the second sealing assembly is compensated by the elastic force provided by the first compensation spring and the second compensation spring which are compressed and deformed, so that the contact surfaces between the two sealing assemblies and the rotating shaft are always kept in a tight state, and the first compensation spring and the second compensation spring which are symmetrically arranged can mutually achieve force balance under the force transmission action of the sleeve, and the process is an automatic compensation process. After a period of time, the inner walls of the two seal assemblies continue to be abraded until the compression amount of the two compensation springs is quickly released and the two compensation springs restore to the original shape, the pressure of the two compensation springs is gradually reduced, at the moment, the adjusting locking nut rotates towards the direction close to the seal assemblies, the compensation springs return to the compression state again, the seal assemblies can enter the automatic compensation process of the next round, the process is repeated for many times until the seal assemblies completely lose efficacy, and the service life of the seal assemblies is about 5-7 times of the original service life. It should be noted that the positions of the first press-fitting component and the second press-fitting component can be exchanged, that is, the adjusting and locking nut can be installed on any one side or both sides of the first press-fitting component and the second press-fitting component.
The first press-fitting assembly further comprises a dust ring 54 embedded on the axial outer end face of the gland,
the side walls of the first compensation block and the second compensation block are provided with step structures, the inner wall of the sleeve is provided with a first hole shoulder 25 and a second hole shoulder 26 which are matched with the step structures of the first compensation block and the second compensation block respectively, the step structures of the first compensation block and the second compensation block are used for limiting the axial sliding limits of the first compensation block and the second compensation block respectively, in the using process, the position and the axial height of the step structures of the first compensation block and the axial sliding limits of the second compensation block can be set according to needs, when the position-locking nut cannot be adjusted to rotate, the compression amount of the sealing assembly reaches a limited value, and the sealing assembly is prompted to be replaced.
The position of the inner wall of the sleeve corresponding to the cooling medium inlet is concavely provided with an annular water channel 21, the check ring 24 comprises a first check ring 241 and a second check ring 242 which are arranged at two sides of the width direction of the annular water channel, the first check ring corresponds to one end of the rotating shaft connected with the power head main shaft, the second check ring corresponds to the other end of the rotating shaft, the pressure reducing ring 7 is a non-metal hard sealing material, the pressure reducing ring 7 comprises a first pressure reducing ring 71 and a second pressure reducing ring 72, the first pressure reducing ring and the second pressure reducing ring are respectively embedded in a groove preset by the first check ring and the second check ring, one end of the cooling medium circulation channel 10 is communicated with an internal channel of the power head main shaft, the other end of the cooling medium circulation channel is provided with four side through holes 101, the positions of the four side through holes all correspond to the annular water channel 21, the rotating shaft rotates to any position, the four side through holes can keep the state of being communicated with the cooling medium inlet 20, and the width of the annular water channel is larger than the diameter of the side through holes 101, even if the sleeve and the rotating shaft slide relatively in a certain axial direction, the side through hole can be kept in a state of communicating with the cooling medium inlet 20.
The outer wall of the sleeve is welded with a joint 22 with internal threads at a cooling medium inlet, the joint 22 is used for connecting an oil pipe connected from a water pump and introducing the cooling medium into the rotary sealing device, the outer wall of the sleeve is provided with a rotation stopping plate 23, the rotation stopping plate is used for being connected with a rotation stopping mechanism to prevent the sleeve from rotating, the position of the sleeve is locked, the rotation swing of the rotating shaft is reduced under the auxiliary action of two supporting bearings, the swing and linear movement of non-rotating elements (the sleeve and the internal elements thereof), particularly a sealing assembly, can be reduced, and the service life of the rotary sealing device is prolonged.
In particular, it is pointed out that: the inner wall and the outer wall which are not defined in the present invention are both the inner wall and the outer wall in the radial direction, and the inner side and the outer side which are not defined in the present invention are both the inner side and the outer side in the axial direction.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A rotary sealing device for a water supply or gas supply system of a drilling machine is characterized by comprising a rotating shaft (1), wherein a sleeve (2) is arranged outside the rotating shaft, a sealing assembly (4) is arranged between the rotating shaft and the sleeve, a retaining ring (24) is convexly arranged on the inner wall of the sleeve in the axial direction of the sealing assembly and used for directly or indirectly blocking the end face of one axial end of the sealing assembly, and the end face of the other axial end of the sealing assembly is pressed by a press-fitting component;
the rotary sealing device also comprises a compensation spring (3), and the compensation spring is sleeved between the check ring outside the rotating shaft and the sealing assembly or between the press-mounting component and the sealing assembly;
the press-fitting component comprises an adjusting locking nut (67), the adjusting locking nut is provided with an internal thread matched with the external thread of the rotating shaft, the adjusting locking nut is screwed on the rotating shaft, and the adjusting locking nut is directly or indirectly screwed on the rotating shaft along the axial direction to press the compensation spring in the sleeve and the sealing assembly;
the press fitting assembly comprises a second gland (64) which is fixed on the outer end face of the sleeve and is positioned on the inner side of the adjusting and locking nut;
the press-fitting component comprises a compensation block arranged on the axial outer side of the sealing assembly, the end face of the compensation block is used for directly or indirectly propping against the sealing assembly, the thrust of the compensation block to the sealing assembly points to the axial inner side of the sealing assembly, the radial outer wall of the compensation block is provided with a step structure, and the inner wall of the sleeve is provided with a hole shoulder matched with the step structure of the compensation block;
the press-fitting assembly further comprises a first press cover (53) and a second press cover (64) which are fixed on two outer end faces of the sleeve, the first press cover is positioned at one end, close to the power head main shaft, of the sleeve, the second press cover is positioned at one end, far away from the power head main shaft, of the sleeve and positioned on the inner side of the adjusting locking nut, and a shaft shoulder positioned outside the sleeve is arranged at one end, connected with the power head main shaft, of the rotating shaft;
a cooling medium inlet (20) is formed in the middle of the sleeve barrel, an annular water channel (21) is concavely formed in the position, corresponding to the cooling medium inlet, of the inner wall of the sleeve, a cooling medium circulation channel (10) is formed in the rotating shaft along the axial direction, one end of the cooling medium circulation channel is communicated with an inner channel of the power head main shaft, four side through holes (101) are formed in the other end of the cooling medium circulation channel, and the positions of the four side through holes correspond to the annular water channel; the compensation springs and the sealing assembly parts are symmetrically arranged in two groups, one group of sealing assembly parts corresponds to one check ring, one group of compensation springs and one group of press-fitting assemblies, the two groups of sealing assembly parts are symmetrically distributed on two sides of the cooling medium inlet, one group of sealing assembly parts corresponds to one end, connected with the power head main shaft, of the rotating shaft, and the other group of sealing assembly parts corresponds to the other end of the rotating shaft.
2. The rotary sealing device for the water or gas supply system of the drilling machine as claimed in claim 1, wherein the direction of the elastic force of the compensating spring is arranged along the axial direction of the rotating shaft, and the compensating spring is a cylindrical spiral spring.
3. A rotary seal for a drilling rig water or gas supply system according to claim 2, wherein the internal diameter of the cylindrical helical spring is such that the region of contact between the spring wire and the seal assembly is located at a position on the axial end face of the seal assembly adjacent the radially outer edge thereof, such that the seal assembly, having a certain amount of wear on the radially inner wall, deforms predominantly radially inwardly when subjected to an axially compressive force.
4. A rotary seal assembly for a water or gas supply system for a drilling rig according to claim 1 wherein the outer wall of the sleeve is provided with an internally threaded connector (22) at the coolant inlet for connection to a conduit from a mud pump or compressor for introducing coolant into the rotary seal assembly, and the outer wall of the sleeve is provided with a rotation stop plate (23) for connection to a rotation stop mechanism to prevent rotational movement of the sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811460289.XA CN109281613B (en) | 2018-11-30 | 2018-11-30 | Rotary sealing device for water supply or gas supply system of drilling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811460289.XA CN109281613B (en) | 2018-11-30 | 2018-11-30 | Rotary sealing device for water supply or gas supply system of drilling machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109281613A CN109281613A (en) | 2019-01-29 |
| CN109281613B true CN109281613B (en) | 2022-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811460289.XA Active CN109281613B (en) | 2018-11-30 | 2018-11-30 | Rotary sealing device for water supply or gas supply system of drilling machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN109281613B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2901525A1 (en) * | 1979-01-16 | 1980-07-17 | August Mayr | Single button water mixing valve - has rotary sleeve with drillings masked by sealing segments from water inlets |
| 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 |
| CN103527076B (en) * | 2013-11-04 | 2015-11-18 | 恒天九五重工有限公司 | A kind of top driving force water tap |
| 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 |
| CN106402352A (en) * | 2016-11-30 | 2017-02-15 | 恒天九五重工有限公司 | Sealing structure of loading slewing device of rotary drilling rig |
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2018
- 2018-11-30 CN CN201811460289.XA patent/CN109281613B/en active Active
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| CN109281613A (en) | 2019-01-29 |
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