CN218441197U - Three-gas-path rotary joint - Google Patents

Abstract

The utility model relates to a technical field of pipeline connecting piece, the utility model discloses a three gas circuit rotary joint, it includes the pipe box, the coaxial axle core that is provided with in the pipe box, the cover is equipped with the spacer ring on the axle core, a plurality of air inlet ring grooves have been seted up to the spacer ring inner wall, set up at least one second inlet port that runs through the inside and outside both sides of spacer ring on the air inlet ring groove, set up a plurality of first inlet ports that communicate with a plurality of second inlet ports on the pipe box, be provided with a plurality of skeleton oil blanket that are used for sealing between spacer ring and the pipe box, the skeleton oil blanket sets up in first inlet port both sides, seted up many first intercommunication gas circuits in the axle core, the first intercommunication gas circuit other end runs through one side of axle core, second intercommunication gas circuit has still been seted up in the axle core, the both sides that second intercommunication gas circuit runs through the axle core are seted up, one side that second intercommunication gas circuit was close to its admission sets up with the axle core is coaxial. This application has the damage that reduces the skeleton oil blanket to the countershaft outer wall and produce, ensures the effect of rotary joint's leakproofness.

Description

Three-gas-circuit rotary joint

Technical Field

The application relates to the technical field of pipeline connecting pieces, in particular to a three-gas-path rotary joint.

Background

At present, the rotary joint is used for conveying and rolling fluid media to be connected with equipment rotating, reciprocating or rotating at a certain angle, so that the continuous transmission of the fluid to the running equipment and pipelines is ensured, and the fluid media are prevented from being communicated and leaked mutually.

Among the correlation technique, a many gas circuits rotary joint, including pipe box and the pivot of wearing to locate in the pipe box, a plurality of inlet ports have been seted up along radial to the pipe box, the pipe box inner wall set up a plurality of with a plurality of inlet port one-to-ones admit air the annular, a plurality of intercommunication gas circuits have been seted up to the inside of pivot, a plurality of intercommunication gas circuits one end and a plurality of admit air annular intercommunication setting, the intercommunication gas circuit other end is seted up in pivot one side, be provided with a plurality of skeleton oil blanket that are used for sealing on the pipe box inner wall, the skeleton oil blanket adopts the plastic preparation, a string leads to the leakage each other for prevent gas.

To the correlation technique among the above-mentioned, the inventor thinks adopt skeleton oil blanket direct mount in the pipe box inner wall among the correlation technique, at the rotatory in-process of pivot, the friction in-process of skeleton oil blanket and pivot can produce certain heat, after pivot stall, the skeleton oil blanket of plastic preparation can shrink rapidly, can cause the skeleton oil blanket to hold the pivot tightly, will produce certain damage to the pivot surface after the pivot restarts, at the in-process of long-time use, can lead to the impaired serious sealing that can not guarantee the gas circuit of pivot, treat urgently and improve.

SUMMERY OF THE UTILITY MODEL

In order to reduce the damage that the skeleton oil blanket produced to the outer wall of the rotating shaft, ensure rotary joint's leakproofness, this application provides a three gas circuit rotary joint.

The application provides a three gas circuit rotary joint adopts following technical scheme:

the utility model provides a three gas circuit rotary joint, includes the pipe box, the coaxial axle core that is provided with in the pipe box, the cover is equipped with the divider ring on the axle core, a plurality of air inlet ring grooves have been seted up to the divider ring inner wall, set up at least one on the air inlet ring groove and run through the second inlet port of the inside and outside both sides of divider ring, set up a plurality ofly and a plurality ofly on the pipe box the first inlet port of second inlet port intercommunication, the divider ring with be provided with a plurality of skeleton oil blanket that are used for sealing between the pipe box, the skeleton oil blanket set up in first inlet port both sides, set up many first intercommunication gas circuits in the axle core, many first intercommunication gas circuit is with a plurality ofly air inlet ring groove one-to-one and be linked together and set up, the first intercommunication gas circuit other end runs through one side of axle core, second intercommunication gas circuit has still been seted up in the axle core, second intercommunication gas circuit runs through the both sides of axle core are seted up, second intercommunication gas circuit be close to its one side of admitting air with the coaxial setting of axle core.

By adopting the technical scheme, one end of the shaft core is fixed on rotating equipment during working, gas is injected into the first gas inlet hole and the second communicating gas path, and finally the gas is output from the same side of the shaft core, so that the working of the multi-gas path rotary joint is realized; by adopting the design, the framework oil seal sleeve is arranged on the separating ring, so that the direct contact between the framework oil seal and the shaft core can be avoided, the abrasion on the surface of the shaft core is reduced, the service life of the shaft core is ensured, the separating ring subjected to abrasion is better after long-time use, the cost of replacing parts of the rotary joint is reduced, the sealing performance of the rotary joint is also ensured, and the convenience of using the rotary joint is improved.

Preferably, the shaft core is sleeved with two rotating bearings, the two rotating bearings are respectively positioned on two sides of the pipe sleeve, and the outer wall of each rotating bearing is abutted to the inner wall of the pipe sleeve.

Through adopting above-mentioned technical scheme, use two rolling bearing can make axle core and pipe box coaxial rotation better, improve axle core pivoted stability.

Preferably, the inner wall of the pipe sleeve is provided with a limiting groove for clamping and fixing the rotating bearing, the limiting groove penetrates through the side wall of the pipe sleeve, one side of the rotating bearing, which is close to the separating ring, is abutted to the separating ring, one side of the rotating bearing, which is close to the separating ring, is also provided with a butt plate, and the butt plate is used for abutting and fixing the framework oil seal.

By adopting the technical scheme, the limit groove formed in the inner wall of the pipe sleeve is used for clamping the rotating bearing, the framework oil seal and the separating ring are respectively fixed by matching the rotating bearing, and the stability of fixing the framework oil seal and the separating ring is improved.

Preferably, the outer wall of the shaft core is integrally formed with a baffle ring, the baffle ring abuts against the rotating bearing, one side of the shaft core is connected with a fixed sealing plate through a bolt, and the fixed sealing plate abuts against the rotating bearing.

Through adopting above-mentioned technical scheme, use to keep off the ring and fix the shrouding and fix rolling bearing, avoid rolling bearing to take place to rock along the axial, improve the stability of pipe box inner structure.

Preferably, a plurality of air inlet sealing rings are embedded in the inner wall of the separating ring and are used for preventing air in a plurality of air inlet ring grooves from being communicated and leaking.

Through adopting above-mentioned technical scheme, adopt the sealing washer to separate a plurality of air inlet ring grooves, improve the inside leakproofness of rotary joint, ensure revolution mechanic output gas pressure.

Preferably, the pipe sleeve inner wall is provided with a plurality of support rings, the support ring with first inlet port one-to-one sets up, just skeleton oil blanket butt in the support ring both sides, the first intercommunication annular with first inlet port intercommunication is seted up to the support ring outer wall, the second intercommunication annular with the second inlet port intercommunication is seted up to the support ring inner wall, set up a plurality of being used for the intercommunication on the support ring first intercommunication annular with the opening of second intercommunication annular.

Through adopting above-mentioned technical scheme, use the support ring to transport gas, adopt first intercommunication annular and second intercommunication annular can make gas can be more in the same direction as flowing in the city, improve the convenience that uses rotary joint.

Preferably, a pneumatic cavity is formed in one side, close to the support ring, of the framework oil seal, pneumatic holes are formed in two sides of the support ring, and the pneumatic holes are used for communicating the pneumatic cavity with the circulation holes.

Through adopting above-mentioned technical scheme, with gaseous by pneumatic hole input pneumatic intracavity to make the skeleton oil blanket can take place certain deformation under the effect of gas pressure, make the skeleton oil blanket can be better support tight pipe box inner wall and spacer ring outer wall, improve rotary joint inner structure's leakproofness.

Preferably, the inner wall of the framework oil seal is integrally formed with a sealing ring for abutting against the outer wall of the separation ring, and the inner diameter of the sealing ring is gradually reduced along the direction close to the support ring.

Through adopting above-mentioned technical scheme, use the sealing ring can avoid the skeleton oil blanket when receiving gas pressure, the deformation volume is too big, leads to the tip of skeleton oil blanket to take place the turn-ups, influences rotary joint's leakproofness, improves leakproofness and the stability that the skeleton oil blanket used.

In summary, the present application includes at least one of the following beneficial technical effects:

the separating ring is sleeved on the shaft core, and the framework oil seal rotates on the separating ring, so that the framework oil seal can be prevented from being in direct contact with the shaft core, the surface abrasion of the shaft core can be effectively reduced, the service life of the shaft core is ensured, the abraded separating ring is better after long-time use, the cost for replacing parts of the rotary joint is reduced, the sealing performance of the rotary joint is ensured, and the convenience for using the rotary joint is improved;

the pneumatic holes communicated with the pneumatic cavity are formed in the two sides of the support ring, so that gas can be input into the pneumatic cavity, the framework oil seal can deform to a certain extent under the action of gas pressure, the framework oil seal can better abut against the inner wall of the pipe sleeve and the outer wall of the separation ring, and the sealing performance of the internal structure of the rotating structure is improved;

through having the sealing ring at skeleton oil blanket inner wall integrated into one piece, when the skeleton oil blanket receives gas pressure and takes place to warp, the condition that reduces the tip of skeleton oil blanket and roll up takes place, improves leakproofness and the stability that the skeleton oil blanket used.

Drawings

Fig. 1 is a schematic structural diagram of a three-gas-path rotary joint according to embodiment 1 of the present application.

Fig. 2 is a cross-sectional view of a three-air-passage rotary joint according to embodiment 1 of the present application.

Fig. 3 is an enlarged schematic view of a portion a of fig. 2.

Fig. 4 is a schematic cross-sectional view of a three-air-passage rotary joint according to embodiment 1 of the present application, which shows a first communicating air passage and a second communicating air passage in a highlighted manner.

Fig. 5 is a partial sectional view of a three gas circuit rotary joint according to embodiment 2 of the present application.

Reference numerals: 1. a shaft core; 2. pipe sleeve; 3. a rotating bearing; 4. fixing the closing plate; 5. a second communicating gas path; 6. a first air intake hole; 7. an oil inlet hole; 8. a spacer ring; 9. framework oil seal; 10. abutting against the plate; 11. a baffle ring; 12. a middle partition plate; 13. a first communicating ring groove; 14. a flow-through hole; 15. a second communicating ring groove; 16. a second air intake hole; 17. an air inlet ring groove; 18. an air inlet sealing ring; 19. a support ring; 20. a pressure coil spring; 21. a seal ring; 22. a pneumatic hole; 23. a pneumatic chamber; 24. a liquid inlet cavity; 25. the first communicating air path.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses three gas circuit rotary joint.

Example 1:

referring to fig. 2 and 3, the three-gas-path rotary joint comprises a pipe sleeve 2, wherein the pipe sleeve 2 is annular, a shaft core 1 is coaxially arranged in the pipe sleeve 2, the shaft core 1 is cylindrical, one end of the shaft core 1 is connected to rotary equipment through a bolt, a separating ring 8 is sleeved on the shaft core 1, two gas inlet ring grooves 17 are formed in the inner wall of the separating ring 8 at intervals, two second gas inlet holes 16 are formed in the gas inlet ring grooves 17 in a penetrating mode along the radial direction, a plurality of gas inlet sealing rings 21 are embedded in the inner wall of the separating ring 8, and the gas inlet sealing rings 18 are used for preventing gas in the two gas inlet ring grooves 17 from being communicated and leaking; the pipe sleeve 2 is provided with a first air inlet 6, the first air inlet 6 is communicated with a second air inlet 16, four framework oil seals 9 for sealing are fixed between the separating ring 8 and the pipe sleeve 2, the framework oil seals 9 are made of plastic, the framework oil seals 9 are fixed on two sides of the first air inlet 6, two first communicating air paths 25 are formed in the shaft core 1, the two first communicating air paths 25 are in one-to-one correspondence with the two air inlet ring grooves 17 and are communicated with each other, the other end of each first communicating air path 25 penetrates through one side, close to equipment, of the shaft core 1, a second communicating air path 5 is further formed in the shaft core 1, two sides, penetrating through an axis, of the second communicating air path 5 are formed, and one side, close to air inlet, of the second communicating air path 5 is formed coaxially with the shaft core 1.

Adopt such design, can realize the gas transportation of three gas circuits, improve the convenience of gas transportation, go up the cover with axle core 1 and be equipped with spacer ring 8, make skeleton oil blanket 9 rotate on spacer ring 8, can avoid skeleton oil blanket 9 and axle core 1's direct contact, thereby can reduce the damage to axle core 1 outer wall, improve the life of axle core 1, only need change spacer ring 8 after using for a long time, just can ensure the holistic leakproofness of rotary joint, improve the convenience of using skeleton oil blanket 9 to rotary joint sealing.

Referring to fig. 1 and 2, two rotating bearings 3 are sleeved on a shaft core 1, the two rotating bearings 3 are respectively located on two sides of a pipe sleeve 2, the outer walls of the rotating bearings 3 abut against the inner wall of the pipe sleeve 2, a separation ring 8 is sleeved between the two rotating bearings 3 and abuts against a fixed separation ring 8 through the two rotating bearings 3, a baffle ring 11 is integrally formed on the inner wall of the shaft core 1, one side, away from the pipe sleeve 2, of each rotating bearing 3 abuts against the baffle ring 11, one side of the shaft core 1 is in bolted connection with a fixed seal plate 4, the fixed seal plate 4 is cylindrical, and the fixed seal plate 4 abuts against one side, away from the pipe sleeve 2, of the other rotating bearing 3; the spacing groove that is used for fixed rolling bearing 3 of joint is offered to 2 inner walls of pipe box, and the spacing groove runs through 2 lateral walls of pipe box, and rolling bearing 3 is close to one side butt of spacer ring 8 and has butt joint board 10, and butt joint board 10 is the ring form, and butt joint board 10 is used for the fixed skeleton oil blanket 9 of butt joint.

By adopting the design, the shaft core 1 can rotate more stably, the separation ring 8 and the framework oil seal 9 can be prevented from sliding along the axial direction, and the stability of using a rotary joint is improved.

Referring to fig. 3 and 4, two support rings 19 are fixed on the inner wall of the pipe sleeve 2, the support rings 19 are arranged in one-to-one correspondence with the first air inlet holes 6, both sides of each support ring 19 abut against the framework oil seal 9, a first air inlet ring groove 17 communicated with the first air inlet hole 6 is formed in the outer wall of each support ring 19, a second communication ring groove 15 communicated with the second air inlet hole 16 is formed in the inner wall of each support ring 19, two circulation holes 14 used for communicating the first communication ring groove 13 with the second communication ring groove 15 are formed in each support ring 19, a middle partition plate 12 is fixed on the inner wall of the pipe sleeve 2, the middle partition plate 12 is C-shaped, a liquid inlet cavity 24 is formed in the middle partition plate 12, and an oil inlet hole 7 communicated with the air inlet cavity is formed in the pipe sleeve 2 in a radial penetrating manner.

By adopting the design, the framework oil seal 9 can be fixed more stably, the framework oil seal 9 can be better sealed, and the convenience of using a rotary joint is improved.

The implementation principle of the embodiment 1 is as follows: when the device works, the shaft core 1 is connected to a device for rotation through bolts, pressure gas is injected into the first air inlet 6 and the second communication air passage 5, and the pressure gas in the first air inlet 6 sequentially passes through the first communication annular groove 13, the circulation hole 14, the second communication annular groove 15, the second air inlet 16 and the air inlet annular groove 17 and finally enters the air passage of the first communication air passage 25 and is injected into the device; the first communicating air path 25 is directly injected into the equipment, thereby completing the air conveying work of the three-air path rotary joint. By adopting the design, the direct contact between the framework oil seal 9 and the shaft core 1 is avoided, the damage of the framework oil seal 9 to the shaft core 1 is reduced, the service life of the shaft core 1 is ensured, after a long time, the separation ring 8 can be replaced, so that the framework oil seal 9 can better seal the rotary joint, the sealing property of the rotary joint is ensured, the cost for maintaining the rotary joint can be reduced only by replacing the separation ring 8, and the convenience for using the rotary joint is improved.

Example 2:

referring to fig. 5, a three-gas-path rotary joint is different from embodiment 1 in that a cross section of a framework oil seal 9 is C-shaped, a pneumatic cavity 23 is formed on one side of the framework oil seal 9 close to a support ring 19, a pressure ring spring 20 for pressing the framework oil seal 9 onto a separation ring 8 is sleeved in the pneumatic cavity 23, a sealing ring 21 for abutting against an outer wall of the separation ring 8 is integrally formed on an inner wall of the framework oil seal 9, an inner diameter of the sealing ring 21 is gradually reduced along a direction close to the support ring 19, and one end of the sealing ring 21 close to the support ring 19 protrudes away from the framework oil seal 9; pneumatic holes 22 are formed in two sides of the support ring 19, and the pneumatic holes 22 are used for communicating the pneumatic cavity 23 with the circulation holes 14.

The implementation principle of the embodiment 2 is as follows: the difference from embodiment 1 is that when the first air inlet 6 injects air, the air will flow into the pneumatic cavity 23 through the pneumatic hole 22, and the pressure air will make the framework oil seal 9 abut against the inner wall of the pipe sleeve 2 and the outer wall of the separation ring 8, so as to improve the sealing effect of the framework oil seal 9 and ensure the pressure of the output pressure air.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a three gas circuit rotary joint which characterized in that: including pipe box (2), coaxial axle core (1) that is provided with in pipe box (2), the cover is equipped with spacer ring (8) on axle core (1), a plurality of annular (17) of admitting air have been seted up to spacer ring (8) inner wall, it runs through to have seted up at least one on annular (17) of admitting air second inlet port (16) of spacer ring (8) inside and outside both sides, set up a plurality ofly on pipe box (2) first inlet port (6) of second inlet port (16) intercommunication, spacer ring (8) with be provided with a plurality of skeleton oil blanket (9) that are used for sealing between pipe box (2), skeleton oil blanket (9) set up in first inlet port (6) both sides, set up many first air circuit (25) in axle core (1), many first air circuit (25) and a plurality of admitting air annular (17) one-to-one and be linked together, first air circuit (25) other end runs through one side of axle core (1), second intercommunication (5) has still been seted up in axle core (1), second air circuit (5) runs through second air circuit (5) coaxial air circuit intercommunication sets up its both sides of admitting air circuit (1), second air circuit (1) intercommunication sets up its both sides of admitting air circuit (1) intercommunication.

2. The three-gas path rotary joint according to claim 1, wherein: the shaft core (1) is sleeved with two rotating bearings (3), the two rotating bearings (3) are respectively located on two sides of the pipe sleeve (2), and the outer wall of each rotating bearing (3) is abutted to the inner wall of the pipe sleeve (2).

3. A three gas circuit rotary joint according to claim 2, wherein: the inner wall of the pipe sleeve (2) is provided with a limiting groove used for clamping and fixing the rotating bearing (3), the limiting groove penetrates through the side wall of the pipe sleeve (2), the rotating bearing (3) is close to one side of the separation ring (8) and abuts against the separation ring (8), a abutting plate (10) is further arranged on one side of the separation ring (8) and is close to the rotating bearing (3), and the abutting plate (10) is used for abutting and fixing the framework oil seal (9).

4. The three-gas path rotary joint according to claim 3, wherein: the outer wall of the shaft core (1) is integrally formed with a retaining ring (11), the retaining ring (11) is abutted to the rotating bearing (3), one side of the shaft core (1) is connected with a fixed sealing plate (4) through a bolt, and the fixed sealing plate (4) is abutted to the rotating bearing (3).

5. The three-gas path rotary joint according to claim 1, wherein: a plurality of air inlet sealing rings (18) are embedded in the inner wall of the separating ring (8), and the air inlet sealing rings (18) are used for preventing gas in a plurality of air inlet ring grooves (17) from being communicated and leaking.

6. The three gas circuit rotary joint of claim 1, wherein: pipe sleeve (2) inner wall is provided with a plurality of support rings (19), support ring (19) with first inlet port (6) one-to-one sets up, just skeleton oil blanket (9) butt in support ring (19) both sides, first intercommunication annular (13) with first inlet port (6) intercommunication are seted up to support ring (19) outer wall, second intercommunication annular (15) with second inlet port (16) intercommunication are seted up to support ring (19) inner wall, set up a plurality of being used for the intercommunication on support ring (19) first intercommunication annular (13) with opening (14) of second intercommunication annular (15).

7. The three-gas path rotary joint according to claim 6, wherein: the framework oil seal (9) is close to one side of the support ring (19) and is provided with a pneumatic cavity (23), pneumatic holes (22) are formed in two sides of the support ring (19), and the pneumatic holes (22) are used for communicating the pneumatic cavity (23) with the circulation hole (14).

8. The three-gas path rotary joint according to claim 7, wherein: the inner wall of the framework oil seal (9) is integrally formed with a sealing ring (21) used for being abutted to the outer wall of the separation ring (8), and the inner diameter of the sealing ring (21) is gradually reduced along the direction close to the support ring (19).

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