Rotary joint for clutch pipeline

Abstract

The invention provides a rotary joint for a clutch pipeline, which comprises a rotary joint support, an air channel is arranged in the rotary joint support, a connecting shaft flange is fixedly arranged on the rotary joint support, a single exhaust bearing seat is sleeved on the basis of the connecting shaft flange, and the single exhaust bearing seat is fixed by an air inlet cover in a press fit manner. The connecting shaft flange and the air inlet connector are fixed in an embedded mode, and a silencer is fixedly connected to the single-exhaust bearing seat. Redundant seal combining elastic soft seal and hard seal is adopted between the valve element and the rotary connector support, the buffering effect between the valve element and the rotary connector support can be achieved, the reliability of initial sealing is improved, and the reliability of hard sealing in the middle and later periods of the rotary connector is improved along with increasing of actions and continuous running-in of a hard sealing face. In addition, the arranged bearing spacer bush assembly is different from an original bearing bush, the situation that the rotating joint cannot be used after a single-layer bearing fails can be effectively avoided through the double-layer structure, and the risk that the bearing flies out to hurt people can be reduced through the existence of the shaft sleeve.

Description

Technical Field

[0001] The invention relates to the technical field of clutch pipeline accessories, in particular to a clutch pipeline rotary joint. Background Art

[0002] A clutch pipeline rotary joint, Figure 1 Its cross-sectional structure is shown therein, including a rotary joint support, an air path channel is opened in the rotary joint support, and a coupling flange is fixedly arranged on the rotary joint support, a single exhaust bearing seat is arranged based on the coupling flange sleeve, and it is pressed and fixed with an air intake cover, and a muffler is connected and fixed on the single exhaust bearing seat; a first gap is arranged between the upper end of the coupling flange and the air intake cover, a second gap is arranged between the middle end of the coupling flange and the inner wall of the single exhaust bearing seat, and a bearing sleeve is arranged in the second gap for receiving the air intake cover and the coupling flange; a third gap is arranged between the lower section of the coupling flange and the rotary joint support, and the third gap is connected to the exhaust port arranged on the single exhaust bearing seat, and a valve core is also arranged between the coupling flange and the rotary joint support, and the valve core and the rotary joint support are tightly contacted to complete a rigid hard seal.

[0003] Based on the rigid hard sealing method between the valve core and the rotary joint support, the sealing effect of the valve core and the rotary joint support is poor due to the unclean air source, and the sealing method between the two requires the cooperation of the two to be supplemented with higher process requirements, which is difficult to process. In addition, only one shaft spring retaining ring is set in the first gap between the upper end of the coupling flange and the air inlet cover. Once it fails, the single exhaust bearing seat, the air inlet cover and the bearing will fly out of the coupling flange and injure people. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art. The present invention proposes a rotary joint for a clutch pipeline, which is used to increase the service life of the rotary joint and reduce the difficulty of the processing technology, while improving the safety performance of the rotary joint.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a clutch pipeline rotary joint, comprising a rotary joint support, an air path passage is opened in the rotary joint support, a coupling flange is fixedly arranged on the rotary joint support, a single exhaust bearing seat is sleeved on the coupling flange, the single exhaust bearing seat is fixed by pressing with an intake cover, the coupling flange is fixed by inserting with the intake cover, a muffler is fixed on the single exhaust bearing seat,

[0006] A first gap is provided between the upper section of the coupling flange and the air inlet cover, a second gap is provided between the middle section of the coupling flange and the inner wall of the single exhaust bearing seat, and a bearing spacer assembly is provided in the second gap;

[0007] A third gap exists between the lower section of the coupling flange and the rotary joint support, and the third gap is communicated with the exhaust port arranged on the single exhaust bearing seat. A valve core is also arranged between the coupling flange and the rotary joint support, and two sealing pairs, a soft elastic seal and a rigid hard seal, are arranged between the valve core and the rotary joint support;

[0008] The bearing spacer assembly comprises a spacer and deep groove ball bearings fixedly arranged at the upper and lower ends of the sleeve. The deep groove ball bearing is fixed in the first gap and the second gap by two shaft retaining rings.

[0009] Furthermore, the gas path channel includes a first channel and a second channel, the first channel runs through the radial direction of the rotary joint support, and the second channel is opened from the top of the rotary joint support and vertically penetrates the first channel.

[0010] Furthermore, an air inlet hole is opened through the thickness direction of the valve core, an inclined surface is provided on the side of the valve core facing the rotary joint support, an elastic sealing member is fixedly provided on the inclined surface, and an inclined groove is provided in the upper section of the second channel, and the inclined groove is tightly fitted with the inclined surface.

[0011] Furthermore, the elastic sealing member includes an engaging section and an elastic section, the engaging section is fixedly embedded on the inclined surface, and the elastic section faces the inclined groove.

[0012] Furthermore, the valve core is a cylindrical structure, a first groove is provided on the upper surface of the valve core, and a second groove is provided on the lower surface of the valve core, the second groove is a bowl-shaped structure, and the air inlet hole vertically penetrates the first groove and the second groove; a groove for embedding a fixed sealing ring is provided on the side of the valve core, and the valve core is movably fixed in the lower section of the connecting flange.

[0013] Furthermore, an exhaust cavity is provided in the single exhaust bearing seat, and the exhaust port is communicated with the exhaust cavity and the third gap.

[0014] Furthermore, a muffler is fixedly arranged at the outlet end of the exhaust port.

[0015] Furthermore, the coupling flange is a hollow structure, and an air intake interface is opened in the air intake cover, and the air intake interface is connected to the coupling flange.

[0016] Compared with the prior art, the beneficial effects of the present invention include: by using two seals, a soft elastic seal and a rigid hard seal, between the valve core and the rotary joint support, on the one hand, direct hard contact between the valve core and the rotary joint can be avoided, and the elastic seal can also play a buffering role between the two, thereby reducing the difficulty of the processing technology;

[0017] In addition, the two shaft retaining rings are redundantly fixed in the first gap and the second gap respectively, and can effectively avoid the risk of the single exhaust bearing seat, the air intake cover and the bearing flying out of the connecting shaft flange and injuring people after the original single shaft retaining ring fails. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them:

[0019] Figure 1 The schematic diagram shows the cross-sectional structure of the old clutch line rotary joint;

[0020] Figure 2 The cross-sectional structure of the rotary joint for the clutch line is schematically shown;

[0021] Figure 3 The partial enlarged structure of the bearing spacer assembly is schematically shown;

[0022] Figure 4 The locally enlarged structure of region A is schematically shown.

[0023] Numbers in the figure: 1-rotating joint support, 2-air path, 21-first channel, 22-second channel, 3-coupling flange, 31-coupling, 4-single exhaust bearing seat, 41-exhaust chamber, 5-intake cover, 51-intake interface, 6-muffler, 71-first gap, 72-second gap, 8-bearing spacer assembly, 81-spacer, 82-deep groove ball bearing, 83-shaft retaining ring, 9-third gap, 10-valve core, 101-first groove, 102-second groove, 103-intake hole, 104-elastic sealing member, 1041-mosaic section, 1042-elastic section. DETAILED DESCRIPTION

[0024] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the present invention.

[0025] A clutch pipeline rotary joint Figure 2 As shown, it includes a rotary joint support 1, an air path 2 is opened in the rotary joint support 1, a coupling flange 3 (formed by welding a coupling 31 and a flange) is fixedly arranged on the rotary joint support 1, a single exhaust bearing seat 4 is sleeved on the coupling flange 3, the aforementioned single exhaust bearing seat 4 is pressed and fixed with an air intake cover 5, the coupling flange 3 is fixed with the air intake cover 5, and a muffler 6 is fixed on the single exhaust bearing seat 4.

[0026] A first gap 71 is provided between the upper section of the aforementioned coupling flange 3 and the air intake cover 5, a second gap 72 is provided between the middle section of the coupling flange 3 and the inner wall of the single exhaust bearing seat 4, a bearing spacer sleeve assembly 8 is provided in the second gap 72, and the bearing spacer sleeve assembly 8 is used to receive the inner coupling flange 3 and the outer single exhaust bearing seat 4; a third gap 9 is provided between the lower section of the aforementioned coupling flange 3 and the rotary joint support 1, the third gap 9 is connected to the exhaust port provided on the single exhaust bearing seat 4, a valve core 10 is further provided between the coupling flange 3 and the rotary joint support 1, and the valve core 10 adopts two seals, a soft elastic seal (elastic sealing ring 104) and a rigid hard seal, between the rotary joint support 1, the elastic sealing method can also play a buffering role between the two, reduce the difficulty of the processing technology, and the combination of the soft elastic seal and the rigid hard seal can improve the service life. The aforementioned bearing spacer sleeve assembly 8 is first described in detail below.

[0027] The following first combines Figure 3 The aforementioned bearing spacer sleeve assembly 8 includes a spacer sleeve 81 and deep groove ball bearings 82 fixedly arranged at the upper and lower ends of the sleeve. The outer side of the deep groove ball bearing 82 is tightly fitted with the inner wall of the aforementioned single exhaust bearing seat 4, and the inner side thereof is tightly fitted with the outer edge surface of the coupling flange 3. The upper ends of the two deep groove ball bearings 82 are respectively fixed in the aforementioned first gaps 7 and 71 by two shaft retaining rings 83, and the two groups of deep groove ball bearings 82 are separated by the spacer sleeve 81. By setting the bearing spacer sleeve assembly 8, compared with the bearing sleeve fixedly arranged on the outer side of the coupling flange 3, the double-layer structure of the two shaft retaining rings 83 in the bearing spacer sleeve assembly 8 can effectively avoid the risk of the single exhaust bearing seat, the air intake cover and the bearing flying out of the coupling flange and injuring people after the failure of a single shaft retaining ring 83.

[0028] It is worth noting that the aforementioned gas path channel 2 includes a first channel 21 and a second channel 22. The first channel 21 runs through the radial direction of the rotary joint support 1, and there can be multiple first channels 21. The multiple first channels 21 are arranged at the same height of the rotary joint support 1. The present invention does not elaborate on the angular relationship between the multiple first channels 21. The aforementioned second channel 22 is opened vertically from the top of the rotary joint support 1 and vertically penetrates the midpoint position of the aforementioned multiple first channels 21.

[0029] The valve core 10 is described in detail below. The valve core 10 is a cylindrical structure as a whole, and an air inlet 103 is opened in the thickness direction of the valve core 10. An inclined surface is provided on the side of the valve core 10 facing the rotary joint support 1, and an elastic seal 104 is fixedly provided on the inclined surface. An inclined groove is provided at the upper end of the second channel 22, and the inclined groove cooperates with the inclined surface provided on the valve core 10, so that the valve core 10 can match the inclined groove on the rotary joint support 1 through the inclined surface. It is worth noting that the radial width of the valve core 10 is greater than the radial width of the second channel 22.

[0030] like Figure 4 As shown, the aforementioned elastic seal 104 includes a fitting section 1041 and an elastic section 1042, the fitting section 1041 is fixedly embedded on the aforementioned inclined surface, and the elastic section 1042 is arranged facing the inclined groove, that is, the elastic seal 104 used between the valve core and the rotary joint support has redundant seals of both elastic seal and hard seal, which can avoid rapid hard contact seal between the valve core and the rotary joint, play a corresponding buffering role, and increase the reliability of the initial seal; and with the wear caused by increased movement, the elastic seal of the elastic seal 104, that is, the elastic section 1042, will be worn flat due to wear. At this time, the fitting section and the inclined surface are matched with the inclined groove, so as to increase the reliability of the hard seal in the middle and late stages of the rotary joint. During maintenance, it is only necessary to replace the elastic seal 104, which greatly improves the reliability and durability of the product seal while reducing the maintenance cost.

[0031] The following is a supplementary description of the aforementioned valve core 10. A first groove 101 is provided on the upper surface of the aforementioned valve core 10, and a second groove 102 is provided on the lower surface of the valve core 10. The aforementioned first groove 101 is a circular structure, and the second groove 102 is a bowl-shaped structure, and the aforementioned first groove 101 and the second groove 102 are projected in the axial direction of the valve core 10 coincide, the aforementioned air inlet 103 vertically penetrates the first groove 101 and the second groove 102, and an embedding groove for embedding a fixed sealing ring is provided on the side of the valve core 10, and the valve core 10 is movably fixed in the lower section of the coupling flange 3.

[0032] Supplementary explanation: an exhaust cavity 41 is provided in the aforementioned single exhaust bearing seat 4, the exhaust port is connected to the exhaust cavity 41 and the second gap 9, and a muffler 6 is fixedly provided at the outlet end of the aforementioned exhaust port. In addition, the aforementioned coupling flange 3 is a hollow structure, an intake interface 51 is provided in the intake joint, the intake interface 51 is connected to the coupling flange 3, a steering channel is provided in the aforementioned intake joint, one end of the steering channel is connected to the aforementioned intake interface 51, and the other end faces the hollow cavity of the aforementioned coupling flange 3, and the intake joint is fixed to the single exhaust bearing seat 4.

[0033] During the assembly process, first install the valve core 10 with the sealing ring and then assemble it under the coupling flange 3. The coupling flange 3 is welded by the coupling 31 and the flange at the lower end. After infiltrating Loctite 290 at the weld to ensure air tightness, fix the coupling flange 3 on the top of the rotary joint support 1, and assemble the bearing spacer assembly 8, the single exhaust bearing seat 4 and the air inlet cover 5 in sequence. After completing the assembly, introduce 0.2MPa compressed air and the valve core 10 should move flexibly without jamming. After the test, use 0.6MPa air pressure to ensure that there is no air leakage at the sealing points of the rotary joint, and then maintain the pressure at 0.8MPa for 10 minutes. After ensuring that there is no air leakage at the rotary joint, apply an appropriate amount of Loctite 222 and assemble the muffler 6 at the exhaust port.

[0034] The technical scope of the present invention is not limited to the contents in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A clutch pipeline rotary joint, comprising a rotary joint support (1), an air path (2) being provided in the rotary joint support (1), a shaft coupling flange (3) being fixedly provided on the rotary joint support (1), a single exhaust bearing seat (4) being sleeved on the shaft coupling flange (3), the single exhaust bearing seat (4) being fixed by a press fit with an air inlet cover (5), a muffler (6) being connected and fixed on the single exhaust bearing seat (4), characterized in that: A first gap (71) is provided between the upper section of the coupling flange (3) and the inner wall of the single exhaust bearing seat (4). A second gap (72) is provided between the middle section of the coupling flange (3) and the inner wall of the single exhaust bearing seat (4), and a bearing spacer assembly (8) is provided in the first gap (7); A third gap (9) is provided between the lower section of the coupling flange (3) and the rotary joint support (1), the third gap (9) being communicated with an exhaust port provided on the single exhaust bearing seat (4), a valve core (10) is also provided between the coupling flange (3) and the rotary joint support (1), and an elastic seal is formed between the valve core (10) and the rotary joint support (1); The bearing spacer assembly (8) comprises a spacer (81) and deep groove ball bearings (82) fixedly arranged at the upper and lower ends of the sleeve, and the deep groove ball bearing (82) is redundantly fixed in the first gap (71) and the second gap (72) by two shaft retaining rings (83).

2. The clutch pipe rotary joint according to claim 1, characterized in that: The gas path channel (2) comprises a first channel (21) and a second channel (22), wherein the first channel (21) penetrates the radial direction of the rotary joint support (1), and the second channel (22) is opened from the top of the rotary joint support (1) and vertically penetrates the first channel (21).

3. The clutch pipe rotary joint according to claim 2, characterized in that: An air inlet hole (103) is provided through the thickness direction of the valve core (10), an inclined surface is provided on the side of the valve core (10) facing the rotary joint support (1), an elastic sealing member (104) is fixedly provided on the inclined surface, and an inclined groove is provided in the upper section of the second channel (22), the inclined groove being in close contact with the inclined surface.

4. The clutch pipeline rotary joint according to claim 3, characterized in that: The elastic sealing member (104) comprises an engaging section (1041) and an elastic section (1042); the engaging section (1041) is bonded and vulcanized and embedded on the inclined surface, and the elastic section (1042) faces the inclined groove.

5. The clutch pipe rotary joint according to claim 3, characterized in that: The valve core (10) is a cylindrical structure, a first groove (101) is provided on the upper surface of the valve core (10), and a second groove (102) is provided on the lower surface of the valve core (10), the second groove (102) is a bowl-shaped structure, and the air inlet (103) vertically penetrates the first groove (101) and the second groove (102); a groove for embedding a fixed sealing ring is provided on the side of the valve core (10), and the valve core (10) is movably fixed in the lower section of the coupling flange (3).

6. The clutch pipeline rotary joint according to claim 1, characterized in that: An exhaust cavity (41) is provided in the single exhaust bearing seat (4), and the exhaust port is in communication with the exhaust cavity (41) and the third gap (9).

7. The clutch pipe rotary joint according to claim 7, characterized in that: A muffler (6) is fixedly arranged at the outlet end of the exhaust port.

8. The clutch pipe rotary joint according to claim 1, characterized in that: The coupling flange (3) is a hollow structure, and an air intake interface (51) is provided in the air intake cover (5), and the air intake interface (51) is communicated with the coupling flange (3).

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