Damping type rotary joint structure

Abstract

The utility model relates to the technical field of rotary joints, and discloses a damping type rotary joint structure which comprises a shell and a rotary sleeve, a first channel is arranged on the shell, a second channel is arranged in the rotary sleeve, an annular step face is arranged on the inner wall of the shell, an annular groove is formed in the annular step face, and a first annular magnet is arranged in the annular groove. The inner wall of the inner end of the rotating sleeve extends to form a rotating ring in clearance fit with the inner wall of the shell, and a sealing ring is arranged on the outer wall of the rotating ring. A second annular magnet is arranged on the outer wall of the inner end of the rotating sleeve, the opposite side faces of the first annular magnet and the second annular magnet are the same in polarity, and an annular buffering gap is formed between the first annular magnet and the second annular magnet. A sliding sleeve is arranged between the outer side of the rotating sleeve and the shell, a bearing is arranged between the sliding sleeve and the rotating sleeve, the outer end of the rotating sleeve extends out of the shell, and an end cover arranged on the outer side of the rotating sleeve in a sleeving mode is arranged at the outer end of the shell. The utility model has the beneficial effects of axial buffering and energy absorption, and good damping effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to rotary joint technical field especially relates to a shock -absorbing type rotary joint structure. BACKGROUND

[0002] Rotary joint is a kind of pipeline connecting component, usually used to transport medium from static pipeline to rotary pipeline, and is widely used in chemical metallurgy, machining cooling, biological medicine field. Since rotary joint includes stationary shell and rotating body, the rotating body will produce certain vibration when rotating in the shell, or vibration will also occur when the rotating body is subjected to axial impact, and the rotating body and shell of ordinary rotary joint cannot produce only in the axial direction, which can easily lead to sealing failure when subjected to axial impact, and further cause rotary joint damage.

[0003] In order to be able to buffer vibration, some rotary joints are provided with springs for shock absorption, for example, Chinese patent No. 2022206824842 discloses a rotary joint with high shock absorption, which is provided with a spring inside for axial shock absorption. However, the spring directly contacts with the medium in the rotary joint, and some media are corrosive, which can easily cause damage to the spring, and further affect the service life of the rotary joint. UTILITY MODEL CONTENT

[0004] The utility model discloses in order to solve the above -mentioned problems existing in the prior art, provide a kind of shock -absorbing type rotary joint structure with good shock absorption performance of axial energy absorption and buffering.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A kind of shock -absorbing type rotary joint structure, including shell, the rotating sleeve rotationally connected with shell, the shell is equipped with first passageway, the rotating sleeve is equipped with second passageway, the inner wall of the shell is equipped with annular stepped surface, the annular stepped surface is equipped with annular groove, the first annular magnet is equipped in the annular groove, the inner end inner wall of the rotating sleeve is extended and is formed with the rotating ring that the inner wall of shell clearance cooperation, the outer wall of the rotating ring is equipped with sealing ring;The inner end outer wall of the rotating sleeve is equipped with the second annular magnet that is distributed with the first annular magnet, the polarity of the side of the first annular magnet, second annular magnet is same, annular buffer gap is formed between the first annular magnet and second annular magnet;The outer side of the rotating sleeve and shell are equipped with sliding sleeve, the bearing between the sliding sleeve and rotating sleeve, the outer end of the rotating sleeve is stretched out shell, the outer end of the shell is equipped with the end cover of the sleeve in the outer side of rotating sleeve.

[0007] By adopting the above technical scheme: the first annular magnet and the second annular magnet repel each other, so that the rotating sleeve is axially elastically limited, when the rotating sleeve is axially impacted, the rotating sleeve can be axially displaced and axially vibration energy can be absorbed through the annular buffer gap; the structure is used to replace the traditional spring structure, avoiding damage of components caused by medium corrosion, improving the service life of the rotary joint, and the magnetic force buffer has a non-contact characteristic, and the shock absorption loss is lower than that of a mechanical spring.

[0008] Preferably, the first annular magnet is fixedly connected with the bottom surface of the annular groove through a first bolt, and the second annular magnet is fixedly connected with the outer surface of the rotating sleeve through a second bolt. The first annular magnet and the second annular magnet are more convenient to install and dismount.

[0009] Preferably, an annular boss is arranged at the inner end outer wall of the rotating sleeve, the inner end surface of the annular boss abuts against the outer end surface of the second annular magnet, and a thrust bearing is arranged between the outer end surface of the annular boss and the end cover. The inner end surface of the thrust bearing abuts against the rotating sleeve to balance the repulsion of the first annular magnet and the second annular magnet, so that the rotating sleeve can stably rotate.

[0010] Preferably, a second stepped surface is arranged at the inner wall of the housing and corresponds to the inner end surface of the thrust bearing, the outer end of the annular boss exceeds the second stepped surface, a conical gasket is arranged between the second stepped surface and the thrust bearing, one end of the conical gasket elastically abuts against the second stepped surface, and the other end of the conical gasket elastically abuts against the end surface of the thrust bearing. The conical gasket is a kind of elastic gasket, and the thrust bearing is limited by the conical gasket, so that the thrust bearing can be stably positioned even if the rotating sleeve is axially displaced.

[0011] Preferably, an annular sealing gasket is arranged in the annular buffer gap, and a plurality of convex rings are arranged at both ends of the annular sealing gasket. The annular sealing gasket fills the annular buffer gap and has flexibility, which plays a sealing role on one hand, and when the rotating sleeve is axially displaced, the annular sealing gasket is extruded, which can further play a role in buffering and energy absorption, and the plurality of convex rings can better buffer.

[0012] Preferably, a dustproof baffle ring is arranged between the inner wall of the end cover and the outer wall of the rotating sleeve. The dustproof baffle ring plays a good dustproof role and prevents external dust from entering.

[0013] Preferably, a connecting sleeve for connecting with a pipeline is arranged at the inner end of the housing, and a flange is fixedly arranged at the outer end of the rotating sleeve. The connecting sleeve and the flange are convenient for connecting with external pipelines.

[0014] Therefore, the utility model has the beneficial effects of axial buffer energy absorption and good shock absorption effect. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A structural schematic view of the present application.

[0016] Figure 2 A Figure 1 sectional view.

[0017] Figure 3 A sectional view of the shell.

[0018] Figure 4 A sectional view of the rotating sleeve.

[0019] Figure 5 A Figure 2 enlarged view of part A in the figure.

[0020] Figure 6 A Figure 2 enlarged view of part B in the figure.

[0021] Figure 7 A sectional view of the annular sealing gasket. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial technical effects to be solved by the present application more clear and understandable, the present application will be further described in detail below in combination with the drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the protection scope of the present application.

[0023] It should be understood that, in this document, the expressions "first", "second", etc. are only used for descriptive purposes, and should not be understood as indicating or implying relative importance, nor should it be understood as implicitly indicating the number of the indicated technical features. The features limited by "first", "second" can be explicitly or implicitly indicated to include at least one of the features.

[0024] As Figures 1-6The damping type rotary joint structure shown comprises a shell 1, a rotating sleeve 2 rotationally connected with the shell 1, the shell 1 being provided with a first channel 100, the rotating sleeve 2 being provided with a second channel 200, characterized in that an annular stepped surface 101 is arranged at the inner wall of the shell 1, an annular groove 102 is arranged on the annular stepped surface 101, a first annular magnet 3 is arranged in the annular groove 102, a rotating ring 20 is formed at the inner end of the rotating sleeve 2 in extension with the inner wall of the shell 1 in clearance fit, a sealing ring 40 is arranged at the outer wall of the rotating ring 20, a second annular magnet 5 is arranged at the inner end of the rotating sleeve 2 in opposite distribution with the first annular magnet 3, the polarities of the opposite sides of the first annular magnet 3 and the second annular magnet 5 are the same, an annular buffer gap 35 is formed between the first annular magnet 3 and the second annular magnet 5, a sliding sleeve 6 is arranged between the outer side of the rotating sleeve 2 and the shell 1, a bearing 60 is arranged between the sliding sleeve 6 and the rotating sleeve 2, the outer end of the rotating sleeve 2 extends out of the shell 1, and an end cover 7 is arranged on the outer side of the rotating sleeve 2 in sleeving with the shell 1.

[0025] A dustproof baffle ring 70 is arranged between the inner wall of the end cover 7 and the outer wall of the rotating sleeve 2. The inner end of the shell 1 is provided with a connecting sleeve 10 for connecting with a pipeline, and the outer end of the rotating sleeve 2 is fixedly provided with a flange 22.

[0026] In order to increase the repulsive force of the first annular magnet 3 and the second annular magnet 5, in some embodiments, the first annular magnet 3 and the second annular magnet 5 are both made of neodymium iron boron magnet. In order to prevent the interference of the shell and the rotating sleeve to the first annular magnet 3 and the second annular magnet 5, in some embodiments, the materials of the shell and the rotating sleeve are selected to be non-ferromagnetic materials, such as aluminum, aluminum alloy, copper, copper alloy and other metal materials.

[0027] The first annular magnet 3 is fixedly connected with the bottom surface of the annular groove 102 through a first bolt 30, and the second annular magnet 5 is fixedly connected with the outer side of the rotating sleeve 2 through a second bolt 50. The inner end of the rotating sleeve 2 is provided with an annular boss 21, the inner end surface of the annular boss 90 abuts against the outer end surface of the second annular magnet 5, and a thrust bearing 8 is arranged between the outer end surface of the annular boss 90 and the end cover 7.

[0028] The inner end surface of the thrust bearing 8 corresponds to the second stepped surface 103 at the inner wall of the shell 1, the outer end of the annular boss 21 exceeds the second stepped surface 103, a conical gasket 104 is arranged between the second stepped surface 103 and the thrust bearing 8, one end of the conical gasket 104 elastically abuts against the second stepped surface 103, and the other end of the conical gasket 104 elastically abuts against the end surface of the thrust bearing 8.

[0029] An annular sealing gasket 9 is arranged in the annular buffer gap 35, as shown, the two ends of the annular sealing gasket 9 are both provided with a plurality of convex rings 90. The annular sealing gasket is made of flexible materials such as rubber or silicone, and can buffer and absorb energy when pressed. Figure 7 ​

[0030] The principle of the utility model is as follows in combination with the drawings: the repulsion principle of the first annular magnet and the second annular magnet is adopted, so that the inner end of the rotating sleeve is subjected to repulsion force, the outer end of the rotating sleeve abuts on the thrust bearing, and stable rotation of the rotating sleeve is ensured; meanwhile, the rotating sleeve is externally provided with a sliding sleeve, bearings (generally deep groove ball bearings) are arranged between the sliding sleeve and the rotating sleeve, so that the rotating sleeve and the sliding sleeve can smoothly rotate, the sliding sleeve and the inner wall of the shell can relatively slide, and the rotating sleeve can axially displace when subjected to axial force; when the rotating sleeve is axially subjected to impact, the rotating sleeve can axially displace, on one hand, the repulsion force of the magnet is used to buffer and absorb energy, and on the other hand, the annular sealing gasket is compressed to buffer and absorb energy. Double buffering and energy absorption are used to realize shock absorption, and since the magnetic force buffering has non-contact characteristics, the shock absorption loss is lower than that of mechanical spring shock absorption. Since the traditional spring structure is omitted, component damage caused by medium corrosion is avoided, and the utility model is particularly suitable for corrosive medium conveying scenes such as chemical industry, biological medicine and the like.

[0031] In the description of the utility model, it is understood that the directions or positional relationships indicated by up, down, left, right, inner end, outer end, one end and the other end are based on the positions or relationships shown in the drawings, and are only for the purpose of more clearly facilitating the description of the technical scheme of the utility model, and do not indicate or imply that the indicated devices or elements must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as a limitation on the utility model.

[0032] Although the specific embodiments of the utility model are described in detail herein, they are only given for the purpose of explanation, and should not be considered as limiting the scope of the utility model. Various substitutions, changes and modifications can be conceived without departing from the spirit and scope of the utility model.

Claims

1. A damping rotary joint structure, comprising a housing (1) and a rotating sleeve (2) connected with the housing (1), a first channel (100) is arranged on the housing (1), and a second channel (200) is arranged in the rotating sleeve (2), characterized in that, The inner wall of the shell (1) is provided with an annular stepped surface (101), the annular stepped surface (101) is provided with an annular groove (102), the first annular magnet (3) is arranged in the annular groove (102), the inner end of the rotating sleeve (2) is extended to form a rotating ring (20) matched with the inner wall of the shell (1), and the outer wall of the rotating ring (20) is provided with a sealing ring (40). The outer wall of the inner end of the rotating sleeve (2) is provided with the second annular magnet (5) distributed opposite to the first annular magnet (3), the polarities of the opposite sides of the first annular magnet (3) and the second annular magnet (5) are the same, and the annular buffer gap (35) is formed between the first annular magnet (3) and the second annular magnet (5). The outer side of the rotating sleeve (2) is provided with the sliding sleeve (6) between the shell (1), the bearing (60) is arranged between the sliding sleeve (6) and the rotating sleeve (2), the outer end of the rotating sleeve (2) is arranged outside the shell (1), and the outer end of the shell (1) is provided with the end cover (7) arranged outside the rotating sleeve (2).

2. A vibration-damping rotary joint structure according to claim 1, wherein The first annular magnet (3) is fixedly connected with the bottom surface of the annular groove (102) through the first bolt (30), and the second annular magnet (5) is fixedly connected with the outer side of the rotating sleeve (2) through the second bolt (50).

3. A vibration-damping rotary joint structure according to claim 1 or 2, characterized in that The inner end of the annular convex ring (90) is in abutment with the outer end of the second annular magnet (5), and the outer end of the annular convex ring (90) is provided with the thrust bearing (8) between the end cover (7).

4. A vibration-damping rotary joint structure according to claim 3, wherein The inner end of the thrust bearing (8) is arranged at the corresponding position of the second stepped surface (103) of the inner wall of the shell (1), the outer end of the annular convex ring (21) exceeds the second stepped surface (103), the tapered gasket (104) is arranged between the second stepped surface (103) and the thrust bearing (8), one end of the tapered gasket (104) is in elastic abutment with the second stepped surface (103), and the other end of the tapered gasket (104) is in elastic abutment with the end surface of the thrust bearing (8).

5. The shock-absorbing rotary joint structure according to claim 1, wherein The annular buffer gap (35) is provided with the annular sealing gasket (9), and the annular sealing gasket (9) is provided with a plurality of convex rings (90) at both ends.

6. The shock-absorbing rotary joint structure according to claim 1, wherein The inner wall of the end cover (7) is provided with the dustproof blocking ring (70) between the outer wall of the rotating sleeve (2).

7. The shock-absorbing rotary joint structure according to claim 1, wherein The inner end of the shell (1) is provided with the connecting sleeve (10) used for being connected with a pipeline, and the outer end of the rotating sleeve (2) is fixedly provided with the flange (22).

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