CN210318646U

CN210318646U - Automatic switch rotary joint

Info

Publication number: CN210318646U
Application number: CN201921138231.3U
Authority: CN
Inventors: 周存华; 戴永斌; 汤磊; 庄凤娜
Original assignee: Wuxi Aike Sealing Technology Co ltd
Current assignee: Wuxi Aike Sealing Technology Co ltd
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-04-14
Anticipated expiration: 2029-07-18

Abstract

The utility model discloses an automatic switch rotary joint, which comprises a mandrel, a rotor, a shell, a channel distribution shaft, a stator ring seat and a rotor ring seat, wherein the mandrel and the rotor are assembled by a bearing group in a rotating way, the channel distribution shaft is fixed on the mandrel in a way of being attached to the stator ring seat, the shell is fixed on the outer surface of the mandrel, the rotor ring seat is sleeved on the rotor and attached to the stator ring seat, N channels are evenly distributed on the channel distribution shaft along the axial center circumference, a first interface and a second interface are arranged on the shell, the first interface is communicated with one channel, a single hole communicated with the channel is arranged on the stator ring seat, the second interface is communicated with the rest N-1 channels, a kidney-shaped groove simultaneously communicated with the rest channels is arranged on the stator ring seat, N work position holes are evenly distributed on the end surface of the rotor ring seat attached to the stator ring seat along the axial center circumference, the N working position holes are arranged on the same circumferential surface with the single hole and the kidney-shaped groove, and the target working position hole is selected to be connected with the single hole by rotating the rotor ring seat.

Description

Automatic switch rotary joint

Technical Field

The utility model relates to a rotary joint who uses in the rotary seal trade especially relates to an automatic switch rotary joint.

Background

At present, in an automatic control rotary worktable, a plurality of stations are connected with air supply, and when air supply of a certain station needs to be stopped, a common conventional realization method is to use an electromagnetic directional valve to synchronously rotate on a platform and equipment and control the platform one by one through a PLC control system. However, the structure of the control mode is complex, when the speed of the rotary worktable is high, the instability of the worktable under vibration affects the control action precision, a certain reaction time is needed in the process of electronic element feedback signal, PLC operation and electromagnetic reversing valve reversing, the phenomena of control action delay and abnormity can occur in the high-speed rotation state, and the air supply of the target station cannot be effectively stopped.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an automatic switch rotary joint to above-mentioned condition, through designing mechanical type seal structure, improves the sealed effect of runner to opening and closing of simple control runner, the accurate target station air feed that stops.

In order to achieve the purpose, the utility model adopts the following technical proposal:

an automatic switch rotary joint comprises a mandrel, a rotor, a shell, a channel distribution shaft, a stator ring seat and a rotor ring seat, wherein the mandrel and the rotor are rotatably assembled through a bearing group, the channel distribution shaft and the stator ring seat are fixed on the mandrel in a leaning manner, the shell is fixed on the outer surface of the mandrel, the rotor ring seat is sleeved on the rotor and is leaned against the stator ring seat, N channels are uniformly distributed on the channel distribution shaft along the axial center circumference, a first interface and a second interface are arranged on the shell, the first interface is communicated with one channel, a single hole communicated with the channel is arranged on the stator ring seat, the second interface is communicated with the rest N-1 channels, a kidney-shaped groove simultaneously communicated with the rest channels is arranged on the stator ring seat, N station holes are uniformly distributed on the end surface of the rotor ring seat leaning against the stator ring seat along the axial center circumference, and the N station holes are communicated with the single hole, The kidney-shaped grooves are arranged on the same circumferential surface, and the target station hole is selected to be connected with the single hole by rotating the rotor ring seat.

Furthermore, a stator sealing ring surrounding the kidney-shaped groove and the single hole is arranged on the end face, attached to the rotor ring seat, of the stator ring seat, and a rotor sealing ring surrounding the station hole is arranged on the end face, attached to the stator ring seat, of the rotor ring seat.

Further, the stator sealing ring and the rotor sealing ring are made of wear-resistant silicon carbide and carbon graphite materials.

Furthermore, a plurality of positioning holes are formed in the end face, attached to the rotor, of the rotor ring seat, cylindrical pins extending into the positioning holes are arranged on the rotor, springs are sleeved on the cylindrical pins, and the springs apply pressure to the rotor ring seat in the axial direction.

Furthermore, two annular grooves are formed in the inner wall, attached to the channel distribution shaft, of the shell, the two annular grooves are correspondingly communicated with the first interface and the second interface, N channel ports are formed in the inner wall, attached to the shell, of the channel distribution shaft, one channel port and one annular groove are located in the same plane perpendicular to the axis, and the rest N-1 channel ports and the other annular groove are located in the same plane perpendicular to the axis.

Further, sealing rings are arranged between the channel distribution shaft and the shell and positioned on two sides of the two annular grooves.

Furthermore, the first interface is communicated with compressed air, and the second interface is connected with a vacuum generator.

Furthermore, the mandrel is provided with a limit step and a limit stop, the bearing group is positioned between the limit step and the limit stop, and the limit step and the limit stop are respectively limited on two sides of the bearing group.

Further, the bearing set includes a thrust ball bearing that receives an axial load and a deep groove ball bearing that receives a radial load.

To sum up, the beneficial effects of the utility model are that, compared with the prior art, automatic switch rotary joint adopts mechanical type seal structure, through the relative position of rotatory rotor ring seat and stator ring seat, realize the butt joint in haplopore and target station hole to realize the special action requirement of target station, it is simple to switch, and control is convenient, in addition, the butt joint department of rotor ring seat and stator ring seat adopts the carbonaceous sealing ring sealed, carbonaceous sealing ring is excellent in performance, and heat resistance is good, and contact friction is little, and the cooperation spring action guarantees sealed effect, stable in structure, low in manufacturing cost, the life-span is permanent, has sufficient economic benefits.

Drawings

Fig. 1 is a schematic structural diagram of an automatic switch rotary joint provided by an embodiment of the present invention;

FIG. 2 is a schematic structural view of the stator seal ring of FIG. 1;

fig. 3 is a schematic structural view of the rotor seal ring of fig. 1.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, 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 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, and are only for convenience of description and simplification of 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; 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 present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 3, the present embodiment provides an automatic switching rotary joint, which includes a core shaft 1, a rotor 2, a housing 3, a channel distribution shaft 4, a stator ring seat 5, and a rotor ring seat 6.

The mandrel 1 and the rotor 2 are assembled in a rotating mode through a bearing set 7, and the bearing set 7 comprises a thrust ball bearing axial load and a deep groove ball bearing radial load. The mandrel 1 is provided with a limit step 8 and a limit stop 9, the bearing group 7 is positioned between the limit step 8 and the limit stop 9, and the limit step 8 and the limit stop 9 are respectively limited on two sides of the bearing group 7.

The channel distribution shaft 4 is fixed on the mandrel 1 in a manner of being attached to the stator ring seat 5, the shell 3 is fixed on the outer surface of the mandrel 1, and the rotor ring seat 6 is sleeved on the rotor 2 and is attached to the stator ring seat 5.

N channels 10(N is more than or equal to 2) are uniformly distributed on the channel distribution shaft 4 along the axial center circumference.

The housing 3 is provided with a first port 11 and a second port 12, the first port 11 is communicated with compressed air in the embodiment, and the second port 12 is connected with a vacuum generator. The first interface 11 is communicated with one of the channels 10, and the stator ring seat 5 is provided with a single hole 13 communicated with the channel 10 to form a compressed air output station. The second interface 12 is communicated with the rest N-1 channels 10, and a kidney-shaped groove 14 which is simultaneously communicated with the rest channels 10 is arranged on the stator ring seat 5 to form a vacuum adsorption station.

N station holes 15 are evenly distributed on the end face, attached to the stator ring seat 5, of the rotor ring seat 6 along the axial center circumference of the rotor ring seat, the N station holes 15, the single hole 13 and the kidney-shaped groove 14 are located on the same circumferential face, and the target station hole 15 is selected to be in butt joint with the single hole 13 by rotating the rotor ring seat 6. The N station holes 15 extend to the outer surface of the curved surface of the rotor ring seat 6 and are externally connected with corresponding vacuum chucks or other pneumatic components.

The end face of the stator ring seat 5, which is attached to the rotor ring seat 6, is provided with a stator sealing ring 16 surrounding the kidney-shaped groove 14 and the single hole 13, and the end face of the rotor ring seat 6, which is attached to the stator ring seat 5, is provided with a rotor sealing ring 17 surrounding the station hole 15. The stator sealing ring 16 and the rotor sealing ring 17 are made of wear-resistant silicon carbide and carbon graphite materials, and the sealing ring made of the materials is excellent in heat resistance, small in friction coefficient and good in sealing performance.

The end face, attached to the rotor 2, of the rotor ring seat 6 is provided with a plurality of positioning holes, the rotor 2 is provided with cylindrical pins extending into the positioning holes, springs 18 are sleeved on the cylindrical pins, and the springs 18 apply pressure to the rotor ring seat 6 axially. The cylindrical pin prevents the displacement between the rotor sealing ring 17 and the rotor 2, and the spring 18 is used for pressing the rotor ring seat 6 against the stator ring seat 5, so that the sealing effect is ensured.

Two annular grooves 19 are formed in the inner wall, attached to the channel distribution shaft 4, of the housing 3, the two annular grooves 19 are correspondingly communicated with the first connector 11 and the second connector 12, N channel ports are formed in the inner wall, attached to the housing 3, of the channel distribution shaft 4, one channel port and one annular groove 19 are located in the same plane perpendicular to the axis, and the remaining N-1 channel ports and the other annular groove 19 are located in the same plane perpendicular to the axis.

Sealing rings 20 are arranged between the channel distribution shaft 4 and the housing 3 on both sides of the two annular grooves 19 to ensure the sealing effect between the housing 3 and the channel distribution shaft 4.

During working, assuming that the station hole X on the rotor ring seat 6 is in butt joint with the single hole 13 of the stator ring seat 5, and the adjacent station hole Y and other holes are in butt joint with the kidney-shaped groove 14 of the stator ring seat 5, at the moment, compressed air is output from the station hole X, and the adjacent station hole Y and other holes are in a vacuum adsorption state;

when the station hole Y needs to be switched to output compressed air, the rotor ring seat 6 and the stator ring seat 5 are rotated to relatively displace an angle, at the moment, the station hole Y is butted with a single hole 13 of the stator ring seat 5, the vacuum working state of the station hole Y is changed into the working condition of compressed air, the station hole X is rotatably butted with the position of the kidney-shaped groove 14, the compressed air is closed and enters the vacuum working state, and other station holes cannot change the working state due to the structure of the kidney-shaped groove 14 on the stator ring seat 5, namely the vacuum working is always kept;

when the rotor ring seat 6 continues to rotate, the compressed air stations of the rotor ring seat 6 are switched in sequence.

In addition, the butt joint of the rotor ring seat and the stator ring seat is sealed by a carbon-containing sealing ring, the carbon-containing sealing ring is excellent in performance, good in heat resistance, small in contact friction, matched with the spring action, capable of guaranteeing the sealing effect, stable in structure, low in manufacturing cost, long in service life and sufficient in economic benefit.

The above embodiments have been merely illustrative of the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and does not depart from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An automatic switch rotary joint is characterized by comprising a mandrel, a rotor, a shell, a channel distribution shaft, a stator ring seat and a rotor ring seat, wherein the mandrel and the rotor are rotatably assembled through a bearing set, the channel distribution shaft is fixedly attached to the mandrel in a manner of being attached to the stator ring seat, the shell is fixedly arranged on the outer surface of the mandrel, the rotor ring seat is sleeved on the rotor and is attached to the stator ring seat,

n channels are uniformly distributed on the channel distribution shaft along the axial center of the channel distribution shaft in the circumferential direction,

the shell is provided with a first interface and a second interface, the first interface is communicated with one channel, the stator ring seat is provided with a single hole communicated with the channel, the second interface is communicated with the rest N-1 channels, the stator ring seat is provided with a kidney-shaped groove simultaneously communicated with the rest channels,

n station holes are uniformly distributed on the end face, attached to the stator ring seat, of the rotor ring seat along the axial center circumference of the rotor ring seat, the N station holes, the single hole and the kidney-shaped groove are located on the same circumferential surface, and the target station hole is selected to be in butt joint with the single hole by rotating the rotor ring seat.

2. The automatic switching rotary joint according to claim 1, wherein: the stator ring seat is provided with a stator sealing ring surrounding the kidney-shaped groove and the single hole on the end face attached to the rotor ring seat, and the rotor ring seat is provided with a rotor sealing ring surrounding the station hole on the end face attached to the stator ring seat.

3. The automatic switching rotary joint according to claim 2, wherein: the stator sealing ring and the rotor sealing ring are made of wear-resistant silicon carbide and carbon graphite materials.

4. The automatic switching rotary joint according to claim 1, wherein: the rotor ring seat is characterized in that a plurality of positioning holes are formed in the end face, attached to the rotor, of the rotor ring seat, cylindrical pins extending into the positioning holes are arranged on the rotor, springs are sleeved on the cylindrical pins, and the springs apply pressure to the rotor ring seat in the axial direction.

5. The automatic switching rotary joint according to claim 1, wherein: two annular grooves are formed in the inner wall, attached to the channel distribution shaft, of the shell, the two annular grooves are correspondingly communicated with the first interface and the second interface, N channel ports are formed in the inner wall, attached to the shell, of the channel distribution shaft, one channel port and one annular groove are located in the same plane perpendicular to the axis, and the rest N-1 channel ports and the other annular groove are located in the same plane perpendicular to the axis.

6. The automatic switching rotary joint according to claim 5, wherein: and sealing rings are arranged between the channel distribution shaft and the shell and positioned at two sides of the two annular grooves.

7. The automatic switching rotary joint according to claim 1, wherein: the first interface is communicated with compressed air, and the second interface is connected with a vacuum generator.

8. The automatic switching rotary joint according to claim 1, wherein: the mandrel is provided with a limit step and a limit stop, the bearing group is positioned between the limit step and the limit stop, and the limit step and the limit stop are respectively used for limiting two sides of the bearing group.

9. The automatic switching rotary joint according to claim 1, wherein: the bearing set comprises a thrust ball bearing for bearing axial load and a deep groove ball bearing for bearing radial load.