CN109237029B - Rotary sealing device - Google Patents
Rotary sealing device Download PDFInfo
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- CN109237029B CN109237029B CN201811459014.4A CN201811459014A CN109237029B CN 109237029 B CN109237029 B CN 109237029B CN 201811459014 A CN201811459014 A CN 201811459014A CN 109237029 B CN109237029 B CN 109237029B
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- rotating shaft
- sealing assembly
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- sealing
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- 238000007789 sealing Methods 0.000 title claims abstract description 105
- 239000002826 coolant Substances 0.000 claims description 36
- 230000000712 assembly Effects 0.000 claims description 33
- 238000000429 assembly Methods 0.000 claims description 33
- 210000004907 gland Anatomy 0.000 claims description 12
- 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
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 description 15
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 4
- 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
- 230000008859 change Effects 0.000 description 2
- 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
- 239000002002 slurry Substances 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
- 238000007796 conventional method Methods 0.000 description 1
- 239000000110 cooling liquid 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
- 238000012545 processing Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
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- 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
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- 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
Abstract
The invention provides a rotary sealing device, 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 disk spring is assembled outside the rotating shaft, a check ring is arranged between the check ring and the sealing assembly or between a press-fitting assembly and the sealing assembly, and an opening of a compensation spring faces towards the sealing assembly; the invention can automatically compensate the radial clearance under the action of the pre-pressure force of the disc spring after the sealing assembly is worn in the working process, thereby leading the sealing 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.
Background
The drilling hole of the horizontal directional drilling machine is an extrusion type drilling hole, namely, the drilling mode is that the drill bit extrudes the soil to the radial periphery, the soil is not discharged out of the ground, therefore, the drill bit is subjected to great resistance in the drilling process, the great friction force between the drill bit and the ground layer can cause the temperature of the contact surface between the drill bit and the ground layer to be increased rapidly, the metallographic structure of the drilling tool material is changed, and the service performance of the drilling tool material is reduced, and the quality of the hole forming and pipe pulling is influenced, pressure media (such as high-pressure water or high-pressure gas) must be provided by a slurry or air compression system to soften and transfer the stone soil barrier at the drilling position, on the other hand, the pressure media of the slurry or air compression system also plays a role in cooling the drill bit and the drill rod, the drill bit is prevented from influencing the drilling capability of the drill bit due to the performance change caused by high temperature, therefore, the pressure medium also serves as a cooling medium, and can cool the drill bit and the drill rod. The conventional method is to install a rotary sealing device at the tail end of a main shaft of a power head, wherein the rotary sealing device has the main function of inputting 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 existing rotary sealing device of the horizontal directional drilling machine generally has the problems that the capacity of sealing high-pressure air or pressure water is poor, and the high-pressure air or the pressure water is easy to leak from a rotating shaft and a sealing element due to the abrasion of the sealing element in the long-time rotary dynamic use process, so that the normal work of equipment is influenced. Therefore, there is a need in the art for a solution to this problem.
Disclosure of Invention
The present invention is directed to a rotary seal assembly that solves the problems set forth in the background of the invention.
In order to achieve the purpose, the invention provides a rotary sealing device which comprises a rotating shaft 1, wherein a sleeve 2 is sleeved 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, 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 is assembled between the check ring outside the rotating shaft and the sealing assembly or between the press-fitting component and the sealing assembly.
Preferably, the compensation springs and the seal assemblies are symmetrically arranged in two groups, one group of seal assemblies corresponds to one check ring, one group of compensation springs and one group of press-fitting assemblies, the two groups of seal assemblies are symmetrically distributed on two sides of the cooling medium inlet, one group of seal assemblies corresponds to one end of the rotating shaft, which is connected with the main shaft of the power head, and the other group of seal assemblies corresponds to the other end of the rotating shaft.
Preferably, the contact point between the compensating spring and the end face of the seal assembly should be located at a position near the radially outer edge of the axial end face of the seal assembly, so that the seal assembly, which has a certain amount of wear on the inner wall, deforms mainly in the radially inward direction (i.e., in the direction from the outer wall toward the inner wall) when subjected to an axial compressive force, rather than randomly deforming radially, thereby compensating for the wear occurring on the radially inner wall of the seal assembly and prolonging the life of the seal assembly.
Preferably, the compensation spring is a low-cost disc spring (see fig. 1) which can be flexibly stacked and combined, and the opening of the disc spring faces the seal assembly to ensure that the contact point between the compensation spring and the end face of the seal assembly is located close to the radial outer edge of the seal assembly.
Furthermore, at least one of the two groups of press-fitting 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.
Preferably, the disc springs and the sealing assemblies are symmetrically arranged in two groups, one group of sealing assemblies corresponds to one check ring, one group of disc springs and one group of press-fitting assemblies, the two groups of sealing assemblies are symmetrically distributed on two sides of the cooling medium inlet, one group of sealing assemblies corresponds to one end, connected with the power head main shaft, of the rotating shaft, and the other group of sealing assemblies corresponds to the other end of the rotating shaft.
Furthermore, at least one of the two groups of press-fitting components 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 tightly press the disc spring in the sleeve and the sealing assembly.
Preferably, the press-fitting assembly comprises a compensation block arranged on the axial outer side of the seal assembly, the end face of the compensation block is used for directly or indirectly abutting against the seal assembly, the thrust of the compensation block to the seal assembly points to the axial inner side of the seal 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.
Preferably, the sleeve barrel middle part is equipped with cooling medium entry 20, the position that the sleeve inner wall corresponds the cooling medium entry is concave to be equipped with cyclic annular water course 21, the one end and the power head main shaft internal passage intercommunication of cooling medium circulation passageway 10, the other end of cooling medium 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 of communicating with cooling medium entry 20, the width of cyclic annular water course is greater than the diameter of side through-hole 101, even if sleeve and pivot have taken place certain axial relative slip, the side through-hole still can keep the state of communicating with cooling medium entry 20.
Further, a connector 22 with internal threads is arranged on the outer wall of the sleeve at a cooling medium inlet, the connector 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 a rotation stopping plate 23 is arranged on the outer wall of the sleeve and 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 seal device according to a preferred embodiment of the present invention (a disc 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 comprises a rotating shaft 1 for connecting a main shaft of a power head of a 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 for connecting the main shaft of the power head, 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 radial outer wall of the rotating shaft and the inner wall of 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 component.
The rotary sealing device also 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 is abutted between the check ring and the sealing assembly or between the press-fitting component and the sealing assembly.
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.
Preferably, 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 the inner wall, will deform in a direction that is mainly inward in the radial direction (i.e., in a direction from the outer wall toward the inner wall) when subjected to an axial compressive force, rather than randomly deforming radially, thereby compensating for the wear occurring on the inner wall of the seal assembly and extending the life of the seal assembly.
Preferably, the compensation spring is a low-cost disc spring (see fig. 1) which can be flexibly stacked and combined, and the opening of the disc spring faces the seal assembly to ensure that the contact point between the compensation spring and the end face of the seal assembly is at the edge position close to the outer wall position of the seal assembly.
In this embodiment, the disc springs and the seal assemblies are symmetrically arranged in two groups, one group of seal assemblies corresponds to one retainer ring, one group of disc springs and one group of press-fitting assemblies, the two groups of seal assemblies are symmetrically distributed on two sides of the cooling medium inlet, one group of seal assemblies corresponds to one end of the rotating shaft, which is connected with the main shaft of the power head, and the other group of seal assemblies corresponds to the other end of the rotating shaft.
In this embodiment, a cooling medium inlet 20 is arranged in the middle of the sleeve barrel, an annular water channel 21 is concavely arranged in a position, corresponding to the cooling medium inlet, of the inner wall of the sleeve, one end of a cooling medium circulation channel 10 is communicated with an internal channel of the power head spindle, four side through holes 101 are arranged at the other end of the cooling medium circulation channel, the positions of the four side through holes correspond to the annular water channel 21, the rotating shaft rotates to any position, the four side through holes can be kept in a state of being communicated with the cooling medium inlet 20, the width of the annular water channel is larger than the diameter of the side through holes 101, and even if the sleeve and the rotating shaft slide relatively in a certain axial direction, the side through holes can still be kept in a state of being communicated with the cooling medium inlet 20.
In this embodiment, the outer wall of the sleeve is provided with a connector 22 with internal threads at a cooling medium inlet, the connector 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.
In the invention, the press-fitting component, the compensation spring and the sealing assembly which correspond to one end of the rotating shaft connected with the power head main shaft 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.
Furthermore, the first press-fitting assembly comprises a first compensation block 51 and a first support bearing 52 which are sleeved on the periphery of the rotating shaft and are located inside the sleeve, the first compensation block 51 is located on the inner side, the first support bearing 52 is located on the outer side, the first press-fitting assembly further comprises a first pressing cover 53, the first pressing cover is fixed on the sleeve, and the first pressing cover axially presses the first support bearing to press 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.
Furthermore, the second press-fitting assembly comprises a second compensation block 61, a second support bearing 62, an isolation ring 63, a second gland 64, a thrust bearing 65, a baffle ring 66 and an adjusting and locking nut 67; the second compensation block 61, the second support bearing 62, the isolating ring 63, the thrust bearing 65 and the baffle ring 66 are all sleeved on the periphery of the rotating shaft, the fifth compensation block 61, the second support bearing 62, the isolating ring 63, the thrust bearing 65 and the baffle ring 66 are sequentially distributed from inside to outside and have the same maximum outer diameter, the second gland is fixed on the sleeve, a through hole through which the second compensation block 61, the second support bearing 62, the isolating ring 63, the thrust bearing 65 and the baffle ring 66 can pass or axially move back and forth is formed in the second gland, an adjusting locking nut 67 is provided with an internal thread matched with the external thread at the tail end of the rotating shaft 1, the adjusting locking nut is screwed on the rotating shaft, and the adjusting locking nut is screwed on the rotating shaft in the axial direction to tightly press the second compensation spring 32 and the second seal assembly 42 in the sleeve through the baffle ring 66, the thrust bearing 65, the isolating ring 63, the second support bearing 62 and the second compensation 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 provided with dynamic pressure compensation by the elastic force provided by the first compensation spring and the second compensation spring which are compressed and deformed, so that the contact surface between the two sealing assemblies (comprising the first sealing assembly and the second sealing assembly) and the rotating shaft (namely the inner walls of the first sealing assembly and the second sealing assembly) is always kept in a close state, the first compensation spring and the second compensation spring which are symmetrically arranged can achieve force balance mutually under the transmission action of the sleeve on force, the process is an automatic compensation process, after a period of time, the inner walls of the two sealing assemblies are continuously abraded until the compression amount 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 is rotated towards the direction close to the sealing assemblies to ensure that the compensation springs are returned to the compression state again, the sealing assembly enters the next round of automatic compensation process and is repeated for many times until the sealing assembly is completely out of service, and the service life of the sealing assembly is about 5-7 times of the original service life. It should be pointed out that, the position of pressure equipment subassembly one and pressure equipment subassembly two also can be exchanged, adjust the position nut promptly and can install in arbitrary one side, also can both sides all install, in this embodiment will adjust the position nut setting in two one sides of pressure equipment subassembly mainly in order to make the dismantlement change each part more convenient a bit, only need to adjust the position nut and unscrew the pivot, with all the other parts along with the sleeve pull away from the pivot together can, the sleeve is used for holding the pivot and the central through-hole of other parts sets up to middle hole thin, the thick structure of both ends hole, moreover, the steam generator is simple in structure, and processing is convenient.
Preferably, 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 locking nut is adjusted and cannot rotate, the compression amount of the sealing assembly reaches a limited value, and the sealing assembly is prompted to be replaced.
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 (5)
1. A rotary sealing device is characterized by comprising a rotating shaft (1), wherein a sleeve (2) is sleeved 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 disk spring (3), and the disk spring is assembled between a retainer ring outside the rotating shaft and the sealing assembly or between the press-fit component and the sealing assembly;
the press-fitting component comprises an adjusting locking nut (67) arranged at one end of the rotating shaft, which is far away from the main shaft of the power head, 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 disc 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 locking nut, and the aperture of an inner hole of the second gland is smaller than the outer size of the adjusting locking nut and larger than the outer diameter of the superposed spring and the sealing assembly;
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 pressure equipment subassembly is still including fixing gland one (53) and gland two (64) at two outer terminal surfaces of sleeve, and gland one is located the sleeve and is close to the one end of unit head main shaft, and the gland is two in the sleeve one end of keeping away from the unit head main shaft and be located adjustment lock position nut inboard, and the pivot is provided with the shaft shoulder that is located the sleeve outside in the one end of connecting the unit head main shaft, be provided with between adjustment lock position nut and the gland two and be used for supplying the axial clearance one that adjustment lock position nut adjusted, be provided with between the hole shoulder of sleeve inner wall and the compensating block and supply the axial clearance two that the pressure equipment subassembly slided, gland one is provided with the axial clearance three that supplies the sleeve to slide with the pivot between the shaft shoulder that the one end of being connected the unit head main shaft set up.
2. A rotary seal assembly according to claim 1 wherein the direction of the resilience of the belleville spring is axially of the shaft and the opening of the belleville spring is directed towards the seal assembly to ensure that the point of contact between the belleville spring and the end face of the seal assembly is located adjacent the radially outer edge of the seal assembly so that the radially inner wall of the seal assembly which has experienced some wear is deformed predominantly radially inwardly when subjected to the axially compressive force.
3. A rotary seal assembly according to claim 1 wherein the sleeve outer wall is provided with an internally threaded connector (22) at the coolant inlet for connection to a conduit from a mud pump or compressor to introduce coolant into the rotary seal assembly, the sleeve outer wall being provided with a rotation stop plate (23) for connection to a rotation stop mechanism to prevent rotational movement of the sleeve.
4. The rotary sealing device according to claim 1, wherein 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 in 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.
5. A rotary seal device according to any one of claims 1 to 4, wherein the disc springs and the seal assemblies are symmetrically arranged in two groups, one group of seal assemblies corresponds to one retainer ring, one group of disc springs and one group of press-fitting assemblies, the two groups of seal assemblies are symmetrically arranged on two sides of the cooling medium inlet, one group of seal assemblies corresponds to one end of the rotary shaft connected with the main shaft of the power head, and the other group of seal assemblies corresponds to the other end of the rotary shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811459014.4A CN109237029B (en) | 2018-11-30 | 2018-11-30 | Rotary sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811459014.4A CN109237029B (en) | 2018-11-30 | 2018-11-30 | Rotary sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109237029A CN109237029A (en) | 2019-01-18 |
| CN109237029B true CN109237029B (en) | 2022-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811459014.4A Active CN109237029B (en) | 2018-11-30 | 2018-11-30 | Rotary sealing device |
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| CN113309484B (en) * | 2021-06-29 | 2022-08-02 | 延长泽坤工贸有限公司 | Rotary blowout preventer for oil well construction operation |
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| US2723868A (en) * | 1955-02-02 | 1955-11-15 | Garlock Packing Co | Mechanical shaft seal |
| AT507564B1 (en) * | 2009-01-12 | 2010-06-15 | Hoerbiger Kompressortech Hold | SEAL ASSEMBLY FOR SEALING A PISTON ROD OF A PISTON COMPRESSOR |
| 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 |
| CN201896949U (en) * | 2011-01-24 | 2011-07-13 | 大连华阳光大密封有限公司 | Mechanical seal device for feed pipe of pressure filter |
| JP3175887U (en) * | 2012-03-15 | 2012-06-07 | 株式会社シロタ | Intermediate swivel |
| CN202708073U (en) * | 2012-07-27 | 2013-01-30 | 湖南五新重型装备有限公司 | Rotary body sealing device and rotary bit of horizontal directed drilling rig |
| CN202769158U (en) * | 2012-08-31 | 2013-03-06 | 江苏晨光波纹管有限公司 | Wear-resistant and corrosion-resistant high pressure rotating compensator |
| 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 |
| CN204827228U (en) * | 2015-06-08 | 2015-12-02 | 江苏德航工程机械装备有限公司 | Mud seals rotary mechanism |
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2018
- 2018-11-30 CN CN201811459014.4A patent/CN109237029B/en active Active
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