CN215111218U - Multi-channel rotary joint - Google Patents

Abstract

The utility model discloses a multichannel rotary joint relates to rotary joint technical field. The multi-channel rotary joint comprises an upper rotary table and a lower rotary table which can rotate relative to the upper rotary table; the lower end surface of the upper rotating disc is provided with at least two upper ring grooves concentric with the upper rotating disc, the upper end surface of the lower rotating disc is provided with at least two lower ring grooves concentric with the lower rotating disc corresponding to the upper ring grooves, and the upper ring grooves and the lower ring grooves are correspondingly buckled to form at least two closed ring cavities; the bottom of each upper ring groove is communicated with an upper runner, the upper runner penetrates through the side surface of the upper rotary table from the bottom of the upper ring groove, the bottom of each lower ring groove is communicated with a lower runner, and the lower runner penetrates through the side surface of the lower rotary table from the bottom of the lower ring groove; the upper flow passage, the annular cavity and the lower flow passage which are communicated form a fluid passage together. By adopting the rotary joint and the fluid conveying method thereof, the weight of the rotary joint is reduced, the height of the rotary joint is reduced, and the adaptability of equipment is improved.

Description

Multi-channel rotary joint

Technical Field

The application relates to the technical field of rotary joints, in particular to a multi-channel rotary joint.

Background

The rotary joint, also called a rotary joint, a slip ring, etc., is classified into hydraulic type, pneumatic type, etc. according to the application, and is classified into single pass, multi-pass, etc. according to the number of passages, and is mainly used in a pipeline for conveying a fluid medium, and is installed at a rotary part of a main body device, so that a rigid pipeline fixed on the main body device can relatively rotate and bear a certain fluid pressure.

The rotary joint in heavy machinery such as the existing metallurgical equipment is generally of a rotating body mandrel type, taking a two-way rotating body mandrel type rotary joint as an example, a mandrel of the rotary joint is fixed, relative rotation is realized between a rotating body and the mandrel through a bearing, 3 groups of sealing rings are arranged between the rotating body and the mandrel to realize sealing between the outside and a passage 1 and a passage 2, an end cover is closed on a mandrel shoulder, a gasket group for adjusting the clearance of the bearing is arranged in the middle of the end cover, the end cover is used as a process plug of 2 passages on the mandrel, and the rotating body and the passages on the mandrel are respectively connected through joints. On one hand, the rotating body is processed by hollow cylinder raw materials, the core shaft is processed by solid shaft raw materials, and the processing and removing materials are less, so that the finished product uses more materials; on the other hand, the height dimension of the rotary joint includes the dimensions of structural members such as a fixed base, a bearing, a fixed end cover, a passage, a seal and the like, wherein the heights required by the passage and the seal on the rotary body are overlapped according to the number, and the heights of corresponding mandrels are also increased, so that the rotary joint is heavy and high, and is not suitable for main equipment which requires light weight and limited height space.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application solves the problems that in the prior art, the rotary joint is heavy in weight, high in height and cannot adapt to main equipment with light weight and limited height space, lightens the weight of the rotary joint, reduces the height of the rotary joint and improves the adaptability of the equipment.

The embodiment of the utility model provides a multi-channel rotary joint, which comprises an upper turntable and a lower turntable capable of rotating relative to the upper turntable;

the lower end surface of the upper rotating disc is provided with at least two upper ring grooves concentric with the upper rotating disc, the upper end surface of the lower rotating disc is provided with at least two lower ring grooves concentric with the lower rotating disc corresponding to the upper ring grooves, and the upper ring groove buckles are correspondingly buckled with the lower ring grooves to form at least two closed ring cavities;

the bottom of each upper ring groove is communicated with an upper runner, the upper runner penetrates through the bottom of each upper ring groove to the side surface of the upper rotating disc, the bottom of each lower ring groove is communicated with a lower runner, and the lower runner penetrates through the bottom of each lower ring groove to the side surface of the lower rotating disc;

the upper runners are isolated, and the lower runners are isolated;

the upper flow passage, the annular cavity and the lower flow passage which are communicated form a fluid passage together.

Furthermore, a plurality of the upper runners are arranged along the circumferential direction of the side surface of the upper rotating disc at intervals, and a plurality of the lower runners communicated with the upper runners are arranged along the circumferential direction of the side surface of the lower rotating disc at intervals.

Furthermore, the multi-channel rotary joint further comprises a sealing element, wherein the sealing element is arranged between contact surfaces of the upper annular groove and the lower annular groove which form the annular cavities and used for sealing fluid in each annular cavity.

Furthermore, one sealing element is arranged between the contact surfaces of each upper annular groove and each lower annular groove, and each two adjacent annular cavities share one contact surface.

Furthermore, the multi-channel rotary joint also comprises a mandrel, wherein the mandrel penetrates through the centers of the upper rotary disc and the lower rotary disc, the upper rotary disc is fixed with the mandrel, or the upper rotary disc is integrally connected with the mandrel, and the lower rotary disc is connected with the mandrel through a bearing;

or the lower turntable is fixed with the mandrel, or the lower turntable is integrally connected with the mandrel, and the upper turntable is connected with the mandrel through a bearing.

Furthermore, the multi-channel rotary joint further comprises an end cover, wherein the end cover is mounted at the free end of the mandrel through a bolt and used for axially limiting the upper rotary disc or the lower rotary disc.

Furthermore, the free end of the mandrel is also sleeved with a supporting ring, and the supporting ring is positioned between the end cover and the upper rotating disc.

Furthermore, a gasket group is arranged between the bottom surface of the end cover and the free end of the mandrel.

Furthermore, the end cover is matched with the upper end face of the upper rotary disc through a labyrinth seal structure.

The embodiment of the utility model provides an in one or more technical scheme, following technological effect or advantage have at least:

the embodiment of the utility model provides a pair of multichannel rotary joint sets up a plurality of and the endocentric groove of fitting with a contraceptive ring of last carousel under last terminal surface of carousel, and the annular under a plurality of is seted up to the position that corresponds the groove of fitting with a contraceptive ring to the up end of carousel under, goes up the annular and corresponds the lock with lower annular, makes every closed annular chamber of going up the annular and forming with lower annular to the upper and lower both ends of annular chamber communicate an upward runner and a lower runner respectively, make this upward runner and this lower runner intercommunication, form a fluid passage. The annular cavities are respectively communicated with an upper runner and a lower runner which correspond to the annular cavities, adjacent upper runners are not communicated, adjacent lower runners are not communicated, adjacent annular cavities are not communicated, and the annular cavities are not communicated with the outside. When the rotary joint is used, a corresponding group of upper flow passage and lower flow passage are respectively connected and fixed on a relatively fixed rigid pipeline and a relatively rotating rigid pipeline on the main body equipment, then the relatively rotating rigid pipeline is rotated, and fluid in the relatively fixed rigid pipeline and fluid in the relatively rotating rigid pipeline respectively pass through the upper flow passage and the lower flow passage, so that the rigid pipeline conveying of the fluid on the rotary equipment is realized. Adopt the utility model discloses a multichannel rotary joint has effectively solved among the prior art rotary joint weight big, highly high, and unable adaptation requires the problem of light in weight, the limited main part equipment in high space, has alleviateed rotary joint's weight, has reduced rotary joint's height, has improved the adaptability of equipment.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front cross-sectional view of a two-way swivel provided in an embodiment of the present application;

FIG. 2 is a top view of the two-way swivel shown in FIG. 1 after the upper turntable has been rotated 90 counterclockwise;

FIG. 3 is a first cross-sectional view of a three-way swivel according to an embodiment of the present disclosure;

fig. 4 is a second main sectional view of the three-way swivel joint according to the embodiment of the present disclosure;

FIG. 5 is a top view of a three-way swivel provided by an embodiment of the present application;

fig. 6 is an enlarged view of the structure at a in fig. 1.

Icon: 1. a joint; 2. an upper turntable; 3. a lower turntable; 4. a mandrel; 5. a bearing; 6. a supporting ring; 7. an end cap; 8. a gasket set; 9. a bolt; 10. a seal member; 11. an upper ring groove; 12. a lower ring groove; 13. a labyrinth seal structure; 14. an upper flow passage; 15. and a lower runner.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; the connection can be mechanical connection or electric welding connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1-5, an embodiment of the present invention provides a multi-pass rotary joint, including an upper rotary table 2 and a lower rotary table 3 capable of rotating relative to the upper rotary table 2; the lower end surface of the upper rotating disc 2 is provided with at least two upper ring grooves 11 which are concentric with the upper rotating disc 2, the upper end surface of the lower rotating disc 3 is provided with at least two lower ring grooves 12 which are concentric with the lower rotating disc 3 corresponding to the upper ring grooves 11, and the upper ring grooves 11 and the lower ring grooves 12 are correspondingly buckled to form at least two closed ring cavities; the bottom of each upper ring groove 11 is communicated with an upper runner 14, the upper runner 14 penetrates through the side surface of the upper rotary table 2 from the bottom of the upper ring groove 11, the bottom of each lower ring groove 12 is communicated with a lower runner 15, and the lower runner 15 penetrates through the side surface of the lower rotary table 3 from the bottom of the lower ring groove 12; the upper flow passage 14 is isolated, and the lower flow passage 15 is isolated; the upper flow passage 14, the annular cavity and the lower flow passage 15 which are communicated form a fluid passage together.

The embodiment of the utility model provides a pair of multichannel rotary joint and fluid conveying method thereof, set up a plurality of and go up the concentric ring groove 11 of carousel 2 under last carousel 2's lower terminal surface, the upper end of carousel 3 corresponds the position of going up ring groove 11 and sets up a plurality of lower ring groove 12 under, it corresponds the lock with lower ring groove 12 to go up ring groove 11, make every pair corresponding ring groove 11 that goes up form a closed annular chamber with lower ring groove 12, and communicate runner 14 and runner 15 down on one respectively with the upper and lower both ends of annular chamber, make this go up runner 14 and this runner 15 intercommunication down, form a fluid passage. The annular cavities are respectively communicated with one upper runner 14 and one lower runner 15 corresponding to the annular cavities, the adjacent upper runners 14 are not communicated, the adjacent lower runners 15 are not communicated, the adjacent annular cavities are not communicated, and the annular cavities are not communicated with the outside. When the rotary joint is used, a corresponding group of upper flow passage 14 and lower flow passage 15 are respectively connected and fixed on a relatively fixed rigid pipeline on the main body equipment and a rigid pipeline rotating relative to the main body equipment, then the relatively rotating rigid pipeline is rotated and then rotated, and fluid in the relatively fixed rigid pipeline and fluid in the relatively rotating rigid pipeline respectively pass through the upper flow passage 14 and the lower flow passage 15, so that fluid is conveyed in the rotating equipment and the rigid pipeline. Adopt the utility model discloses a multichannel rotary joint and fluid delivery method thereof has effectively solved among the prior art rotary joint weight big, highly high, and the unable problem that requires light in weight, the limited main part equipment in high space of adaptation has alleviateed rotary joint's weight, has reduced rotary joint's height, has improved the adaptability of equipment.

Wherein, the edge of the upper ring groove 11 is designed to be a ring groove edge structure with thick root and thin top, for example, the section of the edge of the upper ring groove 11 is a Y-shaped structure; the groove edge of the lower ring groove 12 is also designed to be a ring groove edge structure with a thick root part and a slightly thin top part, and meanwhile, the groove edge of the lower ring groove 12 can be attached to the groove edge of the upper ring groove 11, for example, the section of the groove edge of the lower ring groove 12 is of a right-angled trapezoid structure. When 11 trough limits of last annular and 12 trough limits of lower annular are buckled mutually, laminate "Y" type structure and two perpendicular faces of right trapezoid structure, on the one hand, guaranteed the compactness of going up the annular 11 and 12 trough limits of annular of going up the laminating, it is the annular chamber that the fluid can not flow out easily, on the other hand, structurally so design, when satisfying intensity, can save the material as far as again, alleviateed revolution mechanic's weight.

Specifically, referring to fig. 1 and 2, when the rotary joint is a two-way joint, the lower end surface of the upper rotary table 2 is provided with two upper ring grooves 11 concentric with the upper rotary table 2, which are marked as a first upper ring groove and a second upper ring groove, the upper end surface of the lower rotary table 3 is provided with two lower ring grooves 12 corresponding to the upper ring grooves 11, which are marked as a first lower ring groove and a second lower ring groove, the first upper ring groove is buckled with the first lower ring groove, the second upper ring groove is buckled with the second lower ring groove to form a first annular chamber and a second annular chamber, the tank bottom of the first upper ring groove is communicated with the first upper runner, the tank bottom of the second upper ring groove is communicated with the second upper runner, the tank bottom of the first lower ring groove is communicated with the first lower runner, the tank bottom of the second lower ring groove is communicated with the second lower runner, wherein the first upper runner penetrates through the side surface of the upper rotary table 2 from the tank bottom of the first upper ring groove, and the second upper runner penetrates through the side surface of the upper ring groove 2 from the tank bottom of the second upper ring groove, the first lower runner penetrates through the side face of the lower rotary disk 3 from the groove bottom of the first lower ring groove, and the second lower runner penetrates through the side face of the lower rotary disk 3 from the groove bottom of the second lower ring groove, so that the first upper runner, the first annular cavity and the first lower runner are communicated to form a first fluid passage, and the second upper runner, the second annular cavity and the second lower runner are communicated to form a second fluid passage.

Referring to fig. 3-5, when the rotary joint is a three-way joint, the lower end surface of the upper rotary disk 2 is provided with three upper ring grooves 11 concentric with the upper rotary disk 2, which are marked as a first upper ring groove, a second upper ring groove and a third upper ring groove, the upper end surface of the lower rotary disk 3 is provided with three lower ring grooves 12 corresponding to the upper ring grooves 11, which are marked as a first lower ring groove, a second lower ring groove and a third lower ring groove, the first upper ring groove is buckled with the first lower ring groove, the second upper ring groove is buckled with the second lower ring groove, the third upper ring groove is buckled with the third lower ring groove, so as to form a first ring cavity, a second ring cavity and a third ring cavity, the first upper flow channel is communicated with the groove bottom of the first upper ring groove, the second upper flow channel is communicated with the groove bottom of the second upper ring groove, the third upper flow channel is communicated with the third upper flow channel, the first lower flow channel is communicated with the groove bottom of the first lower ring groove, the second lower flow channel is communicated with the second lower flow channel, The bottom of the third lower ring groove is communicated with a third lower runner, wherein the first upper runner penetrates through the side surface of the upper rotary table 2 from the bottom of the first upper ring groove, the second upper runner penetrates through the side surface of the upper rotary table 2 from the bottom of the second upper ring groove, the third upper runner penetrates through the side surface of the upper rotary table 2 from the bottom of the third upper ring groove, the first lower runner penetrates through the side surface of the lower rotary table 3 from the bottom of the first lower ring groove, the second lower runner penetrates through the side surface of the lower rotary table 3 from the bottom of the second lower ring groove, the third lower runner penetrates from the bottom of the third lower ring groove to the side face of the lower rotary disc 3, so that the first upper runner, the first annular cavity and the first lower runner are communicated to form a first fluid passage, the second upper runner, the second annular cavity and the second lower runner are communicated to form a second fluid passage, and the third upper runner, the third annular cavity and the third lower runner are communicated to form a third fluid passage.

By analogy, when the rotary joint is an N-way, the lower end surface of the upper rotary disk 2 is provided with N upper ring grooves 11 which are concentric with the upper rotary disk 2 and are marked as a first upper ring groove, a second upper ring groove, a third upper ring groove, … … and an Nth upper ring groove, the upper end surface of the lower rotary disk 3 is provided with N lower ring grooves 12 which are marked as a first lower ring groove, a second lower ring groove, a third lower ring groove, … … and an Nth lower ring groove, the first upper ring groove is buckled with the first lower ring groove, the second upper ring groove is buckled with the second lower ring groove, the third upper ring groove is buckled with the third lower ring groove, … … and the Nth upper ring groove is buckled with the Nth lower ring groove to form a first annular cavity, a second annular cavity, a third annular cavity, … … and an Nth annular cavity, the groove bottom of the first upper ring groove is communicated with the first upper flow passage, the groove bottom of the second upper ring groove is communicated with the second upper flow passage, and the groove bottom of the third upper flow passage is communicated with the third upper flow passage, the bottom of the first lower ring groove is communicated with a first lower flow channel, the bottom of the second lower ring groove is communicated with a second lower flow channel, the bottom of the third lower ring groove is communicated with a third lower flow channel, … …, the bottom of the Nth lower ring groove is communicated with an Nth lower flow channel, wherein the first upper flow channel penetrates through the side surface of the upper rotary table 2 from the bottom of the first upper ring groove, the second upper flow channel penetrates through the side surface of the upper rotary table 2 from the bottom of the second upper ring groove, the third upper flow channel penetrates through the side surface of the upper rotary table 2 from the bottom of the third upper ring groove, … …, the Nth upper flow channel penetrates through the side surface of the upper rotary table 2 from the bottom of the Nth upper ring groove, the first lower flow channel penetrates through the side surface of the lower rotary table 3 from the bottom of the first lower ring groove, the second lower flow channel penetrates through the side surface of the lower rotary table 3 from the bottom of the second lower ring groove, the third lower flow channel penetrates through the side surface of the lower rotary table 3 from the bottom of the third lower ring groove, … …, the Nth lower flow channel penetrates through the side surface from the bottom of the N lower ring groove to the side surface of the lower rotary table 3, and communicating the first upper flow channel, the first annular cavity and the first lower flow channel to form a first fluid passage, communicating the second upper flow channel, the second annular cavity and the second lower flow channel to form a second fluid passage, communicating the third upper flow channel, the third annular cavity and the third lower flow channel to form a third fluid passage, … …, communicating the nth upper flow channel, the nth annular cavity and the nth lower flow channel to form an nth fluid passage.

In the fluid flow direction of the rotary joint in this embodiment, after the fluid in each path enters the annular cavity from the upper flow passage 14 or the lower flow passage 15, the upper rotating disc 2 or the lower rotating disc 3 is rotated to any angle, and after the fluid in each path enters the annular cavity, the fluid can be divided into two paths to flow around the annular cavity to the corresponding lower flow passage 15 or the corresponding upper flow passage 14 to flow out, and the pressure of the fluid can be provided by the fluid pressure at the inlet end in the rigid pipeline.

Specifically, taking the passage 1 in fig. 1 as an example, the fluid flows in from the lower flow passage 15, then enters the annular cavity, flows to the upper flow passage 14 along the annular cavity, and finally flows out from the upper flow passage 14, so that the delivery of the fluid in the rigid pipelines on the main body equipment and the rotating equipment is realized.

Referring to fig. 2 and 5, a plurality of upper runners 14 are provided at intervals in the circumferential direction of the side surface of the upper turn table 2, and a plurality of lower runners 15 communicating with the upper runners 14 are provided at intervals in the circumferential direction of the side surface of the lower turn table 3.

In this embodiment, a plurality of upper runners 14 may be disposed on the upper turntable 2, a plurality of lower runners 15 may be disposed on the lower turntable 3, the plurality of upper runners 14 are distributed on the circumferential surface of the upper turntable 2, the plurality of lower runners 15 are distributed on the circumferential surface of the lower turntable 3, the upper runners 14 are not intersected with each other, and the lower runners 15 are not intersected with each other, so as to ensure that different fluid passages are not interfered with each other, and thus, the fluid in multiple passages is transported on the equipment and the pipeline.

With reference to fig. 1, 3 and 4, a seal 10 is further included, the seal 10 being disposed between contacting surfaces of an upper annular groove 11 and a lower annular groove 12 forming annular chambers for sealing fluid in each annular chamber.

In this embodiment, a notch is formed on a matching surface formed by contacting the groove edges of each corresponding upper ring groove 11 and lower ring groove 12, and the sealing element 10 is filled in the notch, so that a group of corresponding upper ring grooves 11 and lower ring grooves 12 are buckled to form a sealed annular cavity. It should be noted that the surface of the contact position of the groove edge of each corresponding upper ring groove 11 and lower ring groove 12 is designed as a vertical cylindrical surface, according to the flow characteristic of the fluid, a notch is formed on the cylindrical surface, and the sealing element 10 is filled in the notch formed on the cylindrical surface, instead of forming the notch on the inclined surface and filling the sealing element 10, so that the sealing effect in each fluid passage can be more effectively ensured.

With reference to fig. 1, 3 and 4, a sealing element 10 is arranged between the contact surfaces of each upper annular groove 11 and each lower annular groove 12, and each two adjacent annular cavities share one contact surface.

In this embodiment, on the basis of the above embodiment, each upper ring groove 11 has two groove edges, and each lower ring groove 12 has two groove edges, so that after the upper ring groove 11 and the lower ring groove 12 are fastened, two annular cavities are formed by every three adjacent groove edges, so that three mating surfaces, i.e., contact surfaces are provided, and a sealing element 10 is disposed between each mating surface, so that one sealing element 10 is shared between every two adjacent annular cavities. It should be noted that the size of the sealing element 10 is specifically set according to the size of the contact surface to be sealed, and it is necessary to ensure that the sealing effect between the two mating surfaces is good.

Taking fig. 1 as an example, fig. 1 is a main sectional view of a two-way rotary joint, because the section of the groove edge of an upper ring groove 11 is a Y-shaped structure, the section of the groove edge of a lower ring groove 12 is a right trapezoid structure, in order to further ensure the sealing performance of an annular cavity formed by the upper ring groove 11 and the lower ring groove 12 and ensure the convenient installation of a sealing element 10, the sealing element 10 is arranged between the vertical binding surfaces of the upper ring groove 11 and the lower ring groove 12, so that the circumferential side surfaces of the annular cavity are all sealed, and according to the structural characteristics, one sealing element 10 can be shared between two adjacent annular cavities, the sealing effect is ensured, the number of the sealing elements 10 is also reduced, and the space of a fluid channel is not occupied.

Referring to fig. 1, 3 and 4, the device further comprises a mandrel 4, wherein the mandrel 4 passes through the centers of the upper rotating disc 2 and the lower rotating disc 3, the upper rotating disc 2 is fixedly or integrally connected with the mandrel 4, and the lower rotating disc 3 is connected with the mandrel 4 through a bearing 5. Or the lower turntable 3 is fixedly or integrally connected with the mandrel 4, and the upper turntable 2 is connected with the mandrel 4 through a bearing 5.

In this embodiment, in order to ensure that the upper turntable 2 and the lower turntable 3 rotate relatively, the height position is kept stationary, so that a mandrel 4 passes through the center positions of the upper turntable 2 and the lower turntable 3, one end of the mandrel 4 is fixed through a fixing seat, the lower turntable 3 is fixed or integrally connected with the mandrel 4, the upper turntable 2 is connected with the mandrel 4 through a bearing 5, or the upper turntable 2 is fixed or integrally connected with the mandrel 4, and the lower turntable 3 is connected with the mandrel 4 through the bearing 5, so that the rotation of the upper turntable 2 relative to the lower turntable 3 is realized.

Referring to fig. 1, 3 and 4, the device further comprises an end cover 7, wherein the end cover 7 is mounted at the free end of the mandrel 4 through a bolt 9 and used for axially limiting the upper turntable 2 or the lower turntable 3.

In this embodiment, in order to ensure that the upper turntable 2 or the lower turntable 3 cannot slide out along the free end of the spindle 4 when the upper turntable 2 or the lower turntable 3 is rotated, an end cover 7 is installed at the free end of the spindle 4, and the end cover 7 is fixed to the spindle 4 through a bolt 9, so that the upper turntable 2 or the lower turntable 3 is axially limited.

As shown in fig. 1, the free end of the spindle 4 is further sleeved with a support ring 6, and the support ring 6 is located between the end cover 7 and the upper turntable 2.

In this embodiment, a supporting ring 6 is sleeved on the free end of the mandrel 4, and the supporting ring 6 is located between the end cover 7 and the upper rotary disk 2, so that the end cover 7, the gasket group 8 and the mandrel 4 are fixed into a whole by the bolts 9, the upper rotary disk 2 or the lower rotary disk 3 rotates relative to the end cover 7, but the upper rotary disk 2 or the lower rotary disk 3 is not completely positioned in the axial direction, and can jump upwards, and in order to prevent the upper rotary disk 2 or the lower rotary disk 3 from rubbing against the end cover 7, the supporting ring 6 is arranged to separate the upper rotary disk 2 or the lower rotary disk 3 from the end cover 7.

As shown in fig. 1, a gasket set 8 is further provided between the bottom surface of the end cap 7 and the free end of the mandrel 4.

In this embodiment, the gasket group 8 is disposed between the bottom surface of the end cover 7 and the free end of the mandrel 4, and the up-down position of the end cover 7 can be adjusted by adjusting the number of the gaskets, that is, the size of the gap between the end cover 7 and the upper turntable 2 or the lower turntable 3 is adjusted. Because machining always has errors, the clearance between the end cover 7 and the upper rotary disc 2 is difficult to ensure to be right, sometimes too small or even not, and the end cover and the upper rotary disc are closed by the bolt 9, so that the rotary disc cannot rotate; sometimes the clearance is too big, gets into the dust easily, adjusts with gasket group 8 of this scheme, does not need too high precision, just can guarantee to have a little clearance between end cover 7 lower extreme face and the carousel top surface again, can not frictional contact.

As shown in fig. 6, the end cover 7 is engaged with the upper end surface of the upper rotary disk 2 through a labyrinth structure 13.

In this embodiment, its labyrinth seal structure 13 specifically is type of "bow" style of calligraphy structure matched with structure, with the contact surface between end cover 7 and the last carousel 2 so design, can prevent that external dust from falling into in the clearance between dabber 4 and the carousel after long-time the use, and then influences the rotatory effect of carousel.

Referring to fig. 1-5, as a further optimization of the present solution, the ports of the upper flow passage 14 and the lower flow passage 15 are both connected with the joint 1. In this embodiment, the runner port of each ring groove of the two turntables is respectively connected with one joint 1, so that the connection of an external pipeline can be facilitated, and the quick installation of the rotary joint can be realized.

With the rotary joint of the present embodiment, on the one hand, when the number of passages increases, it is only necessary to increase the diameter of the rotary table, and add the corresponding ring groove, joint 1, and the connecting section of the ring groove and joint 1 on the rotary table, and the material for making the housing required for each unit sectional area of the fluid passage formed by the rotary table is significantly less than the material for making the housing required for each unit sectional area of the fluid passage of the rotor spindle type rotary joint, so that the weight is reduced as a whole, and the material is saved. On the other hand, the height dimension of the rotary joint of the embodiment includes the depth of the fixed base (the lower end flange of the spindle 4), the depth of the grooves of the two rotary discs, the height required by the diameter of one passage, the physical dimension of the materials required by the end cover 7 and each part, when the number of the passages is increased, the dimension is only increased in the diameter direction, the height does not need to be increased too much, the structure is only strengthened, compared with the rotary body spindle type rotary joint, the height of the rotary joint is not increased by one passage and one sealing ring every time one passage is added, and therefore the total height is greatly reduced. In addition, as the diameter of the turntable increases, the corresponding structure of the turntable should be enlarged or strengthened.

In addition, in this embodiment, the width of the annular grooves of the upper rotary disk 2 and the lower rotary disk 3 can be widened, the size of the joint between the joint 1 and the upper rotary disk 2 and the joint between the joint 1 and the lower rotary disk 3 can be widened, and the overall height of the rotary joint is not increased or slightly increased, so that the sectional area of the fluid passage can be increased, and the flow conveying capacity of the rotary joint can be improved.

The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure.

Claims (9)

1. A multi-way rotary joint is characterized by comprising an upper rotary table (2) and a lower rotary table (3) capable of rotating relative to the upper rotary table (2);

the lower end face of the upper rotating disc (2) is provided with at least two upper ring grooves (11) which are concentric with the upper rotating disc (2), the upper end face of the lower rotating disc (3) is provided with at least two lower ring grooves (12) which are concentric with the lower rotating disc (3) and correspond to the upper ring grooves (11), and the upper ring grooves (11) and the lower ring grooves (12) are correspondingly buckled to form at least two closed ring cavities;

an upper flow channel (14) is communicated with the bottom of each upper annular groove (11), the upper flow channel (14) penetrates through the bottom of each upper annular groove (11) to the side surface of the upper rotary table (2), a lower flow channel (15) is communicated with the bottom of each lower annular groove (12), and the lower flow channel (15) penetrates through the bottom of each lower annular groove (12) to the side surface of the lower rotary table (3);

the upper flow channels (14) are isolated, and the lower flow channels (15) are isolated;

the upper flow passage (14), the annular cavity and the lower flow passage (15) which are communicated form a fluid passage together.

2. The multi-way rotary joint according to claim 1, wherein a plurality of the upper flow channels (14) are arranged at intervals in a circumferential direction of a side surface of the upper rotary disk (2), and a plurality of the lower flow channels (15) communicating with the upper flow channels (14) are arranged at intervals in a circumferential direction of a side surface of the lower rotary disk (3).

3. The multi-way swivel according to claim 1, further comprising a seal (10), said seal (10) being arranged between the contact surfaces of said upper ring groove (11) and said lower ring groove (12) forming said annular chambers for sealing fluid in each of said annular chambers.

4. A multi-way swivel according to claim 3, wherein one said sealing member (10) is arranged between the contact surfaces of each said upper ring groove (11) and said lower ring groove (12), and one said contact surface is shared by each two adjacent said ring cavities.

5. The multi-way rotary joint according to claim 1, further comprising a mandrel (4), wherein the mandrel (4) passes through the centers of the upper rotary table (2) and the lower rotary table (3), the upper rotary table (2) is fixedly or integrally connected with the mandrel (4), and the lower rotary table (3) is connected with the mandrel (4) through a bearing (5);

or the lower turntable (3) is fixedly or integrally connected with the mandrel (4), and the upper turntable (2) is connected with the mandrel (4) through a bearing (5).

6. The multi-way swivel according to claim 5, further comprising an end cap (7), the end cap (7) being mounted to the free end of the spindle (4) by means of a bolt (9) for axially limiting the upper (2) or lower (3) turntable.

7. Multi-way swivel according to claim 6, wherein the free end of the spindle (4) is further sleeved with a support ring (6), the support ring (6) being located between the end cap (7) and the upper turn disc (2).

8. Multi-way rotary joint according to claim 6, wherein a shim pack (8) is further provided between the bottom face of the end cap (7) and the free end of the spindle (4).

9. Multi-way rotary joint according to claim 6, wherein the end cap (7) cooperates with the upper end face of the upper rotary disc (2) by means of a labyrinth seal (13).

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