Lubricating grease rotating joint for sealed connection

Abstract

The utility model discloses a sealing connection lubricating grease rotary joint, and relates to the technical field of rotary joints, the sealing connection lubricating grease rotary joint comprises an outer sleeve, an oil outlet joint and an auxiliary butt joint assembly, the inner part of the outer sleeve is provided with a rotating bearing, and the left side and the right side of the outer sleeve are respectively and fixedly provided with a sealing spacer bush; and sealing layers are arranged on the inner sides of the left sealing spacer bush and the right sealing spacer bush, the sealing layers are of annular structures, a fixed connecting pipe is fixed to one side of the sealing spacer bush on the left side, convex rings are fixed to the outer portion of the left side of the fixed connecting pipe and the outer portion of the right side of the sealing spacer bush on the left side, and lip-shaped sealing rings are embedded into the convex rings. According to the lubricating grease rotating joint in sealed connection, the oil outlet joint can be rotationally connected with the outer sleeve under the action of the rotating bearing, the sealing spacer bushes and the sealing layers on the two sides of the outer sleeve can play a dual-sealing role, and the lip-shaped sealing rings are embedded in the convex rings used for being connected with the oil outlet joint and the oil inlet joint on the two sides, so that the sealing effect can be further enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary joints, in particular to a grease rotary joint with a sealed connection. Background Technique

[0002] A rotary joint is a sealed rotary connector for rotating the conveying medium. Its main function is to input liquid from one side of the pipeline into a rotating or reciprocating device and then discharge it from the device. Its application fields almost cover various processing and manufacturing industries, such as metallurgy, machine tools, power generation, petroleum, rubber, plastics, textiles, printing and dyeing, pharmaceuticals, cigarettes, papermaking, food, feed processing, etc.

[0003] In the connection process of the existing grease rotary joint, the transportation of grease usually requires pressure bearing, and in the case of pressure increase, grease leakage at the connection is likely to occur, thus affecting the use.

[0004] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and a grease rotary joint with a sealed connection is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a grease rotary joint with a sealed connection to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A grease rotary joint with a sealed connection, including an outer sleeve, an oil outlet joint and an auxiliary docking component. A rotating bearing is installed inside the outer sleeve, and sealing sleeves are fixed on both the left and right sides of the outer sleeve. Sealing layers are arranged on the inner sides of the two sealing sleeves on the left and right, and the sealing layers are in an annular structure. A fixed connecting pipe is fixed on one side of the left sealing sleeve. Convex rings are fixed on the outer side of the left side of the fixed connecting pipe and the outer side of the right side of the left sealing sleeve, and lip seals are embedded inside the convex rings. An oil outlet joint is installed inside the rotating bearing, and an auxiliary docking component is installed inside the fixed connecting pipe and the oil outlet joint.

[0007] Further, three rotating bearings are equidistantly distributed, and bearing seals are correspondingly arranged for each rotating bearing.

[0008] Further, the auxiliary docking component includes an inner convex platform, a connecting cavity, an annular connecting groove and an elastic retaining ring. The inner convex platform is fixedly connected to the fixed connecting pipe, and a connecting cavity and an annular connecting groove are respectively arranged on the left and right sides of the inner convex platform, and an elastic retaining ring is embedded inside the annular connecting groove.

[0009] Further, the auxiliary docking component further includes a connecting inner pipe. A connecting inner pipe is fixed inside one end of the oil outlet joint, and the size between the connecting inner pipe and the annular connecting groove is matched.

[0010] Furthermore, a gland is fixed on the outer side of the oil outlet joint, and the gland is in close fit with the convex ring.

[0011] Furthermore, an oil inlet joint is installed on the outer side of the fixed connecting pipe, and the size of the oil inlet joint is in line with that of the connecting cavity. A butt joint plate is fixed on the outer side of the oil inlet joint, and the butt joint plate is bolted to the convex ring.

[0012] The utility model provides a grease swivel joint with sealed connection, having the following beneficial effects:

[0013] The utility model is provided with a sealing layer, a convex ring and a lip seal. The oil outlet joint can be rotatably connected with the outer sleeve pipe under the action of a rotating bearing. The sealing sleeves and the sealing layer on both sides of the outer sleeve pipe can play a dual sealing role. The convex rings connected to the oil outlet joints and the oil inlet joints on both sides are embedded with lip seals, which can further enhance the sealing effect, and the lip seals can prevent dust from entering. The gland of the oil outlet joint is in close fit with the corresponding convex ring. At the same time, the butt joint plate of the oil inlet joint is bolted to the corresponding convex ring, which is convenient for the installation of the oil outlet joint and the oil inlet joint at both ends of the outer sleeve pipe.

[0014] The utility model is provided with an auxiliary butt joint assembly. The connecting inner pipe of the oil outlet joint can be rotatably connected with the annular connecting groove of the inner convex platform. This connecting structure has a multi-layer stepped structure, which can extend the overflow flow path of the grease. At the same time, the elastic retaining ring embedded in the annular connecting groove can enhance the sealing performance, thus avoiding the leakage of grease, and facilitating the sealed butt joint between the outer sleeve pipe and the oil outlet joint. The setting of the connecting cavity is convenient for the butt joint of the oil inlet joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic semi-sectional structure view of a grease swivel joint with sealed connection according to the utility model;

[0016] Figure 2 is a schematic overall structure view of a grease swivel joint with sealed connection according to the utility model;

[0017] Figure 3 is an exploded structure view of a grease swivel joint with sealed connection according to the utility model.

[0018] In the figure: 1. Outer sleeve pipe; 2. Rotating bearing; 3. Sealing sleeve; 4. Sealing layer; 5. Fixed connecting pipe; 6. Convex ring; 7. Lip seal; 8. Oil outlet joint; 9. Gland; 10. Auxiliary butt joint assembly; 1001. Inner convex platform; 1002. Connecting cavity; 1003. Annular connecting groove; 1004. Elastic retaining ring; 1005. Connecting inner pipe; 11. Oil inlet joint; 12. Butt joint plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following further describes in detail the implementation manners of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0020] As Figure 1 - Figure 2 shown, a grease swivel joint with a sealed connection includes an outer sleeve 1, an oil outlet joint 8, and an auxiliary docking assembly 10. A rotating bearing 2 is installed inside the outer sleeve 1, and sealing sleeves 3 are fixed on both the left and right sides of the outer sleeve 1. There are three rotating bearings 2 evenly distributed, and bearing seals are correspondingly arranged for the rotating bearings 2. Sealing layers 4 are arranged on the inner sides of the left and right sealing sleeves 3, and the sealing layers 4 are in an annular structure. A fixed connecting pipe 5 is fixed on one side of the left sealing sleeve 3. Convex rings 6 are fixed on the outer side of the left side of the fixed connecting pipe 5 and the outer side of the right side of the left sealing sleeve 3, and lip seals 7 are embedded inside the convex rings 6; the oil outlet joint 8 can be rotatably connected to the outer sleeve 1 under the action of the rotating bearing 2. The sealing sleeves 3 and the sealing layers 4 on both sides of the outer sleeve 1 can play a dual-sealing role. Lip seals 7 are embedded in the convex rings 6 connected to the oil outlet joint 8 and the oil inlet joint 11 on both sides, which can further enhance the sealing effect, and the lip seals 7 can prevent dust from entering.

[0021] As Figure 1 - Figure 2 shown, an oil outlet joint 8 is installed inside the rotating bearing 2. A gland 9 is fixed on the outer side of the oil outlet joint 8, and the gland 9 is in close fit with the convex ring 6. An oil inlet joint 11 is installed on the outer side of the fixed connecting pipe 5, and the size between the oil inlet joint 11 and the connection cavity 1002 is in agreement. A docking plate 12 is fixed on the outer side of the oil inlet joint 11, and the docking plate 12 is bolted to the convex ring 6; the gland 9 of the oil outlet joint 8 is in close fit with the corresponding convex ring 6, and at the same time, the docking plate 12 of the oil inlet joint 11 is bolted to the corresponding convex ring 6, which is convenient for the installation of the oil outlet joint 8 and the oil inlet joint 11 at both ends of the outer sleeve 1. And when the connection part is damaged, only the outer sleeve 1 needs to be replaced, without replacing the entire oil inlet pipeline.

[0022] As Figure 1 and Figure 3As shown in the figure, an auxiliary docking assembly 10 is installed inside the fixed connecting pipe 5 and the oil outlet joint 8. The auxiliary docking assembly 10 includes an inner boss 1001, a connecting cavity 1002, an annular connecting groove 1003 and an elastic retaining ring 1004. The inner boss 1001 is fixedly connected to the fixed connecting pipe 5. Connecting cavities 1002 and annular connecting grooves 1003 are respectively arranged on the left and right sides of the inner boss 1001, and an elastic retaining ring 1004 is embedded inside the annular connecting groove 1003. The auxiliary docking assembly 10 further includes a connecting inner pipe 1005. One end of the oil outlet joint 8 is fixedly provided with the connecting inner pipe 1005, and the size between the connecting inner pipe 1005 and the annular connecting groove 1003 is matched; the connecting inner pipe 1005 of the oil outlet joint 8 can be rotatably connected to the annular connecting groove 1003 of the inner boss 1001. This connecting structure has a multi-layer stepped structure that can extend the overflow flow path of the grease. At the same time, the elastic retaining ring 1004 embedded in the annular connecting groove 1003 can enhance the sealing performance, thus avoiding the leakage of grease, facilitating the sealed docking between the outer sleeve 1 and the oil outlet joint 8, and the arrangement of the connecting cavity 1002 facilitates the docking of the oil inlet joint 11.

[0023] In summary, as Figure 1 - Figure 3 shown in the figure, for this grease rotary joint with sealed connection, during use, first, the oil outlet joint 8 can be connected to the outer sleeve 1, and the connecting inner pipe 1005 of the oil outlet joint 8 can be rotatably connected to the annular connecting groove 1003 of the inner boss 1001. This connecting structure has a multi-layer stepped structure that can extend the overflow flow path of the grease, facilitating the sealed docking between the outer sleeve 1 and the oil outlet joint 8. Then, make the gland 9 of the oil outlet joint 8 closely fit with the corresponding convex ring 6. Then, dock the oil inlet joint 11 with the connecting cavity 1002, and bolt the docking plate 12 of the oil inlet joint 11 to the corresponding convex ring 6, thus realizing the installation of the oil outlet joint 8 and the oil inlet joint 11 at both ends of the outer sleeve 1. During use, the oil outlet joint 8 can rotate with the outer sleeve 1 under the action of the rotating bearing 2. At this time, the sealing spacer sleeves 3 and the sealing layers 4 on both sides of the outer sleeve 1 can play a dual sealing role. At the same time, the elastic retaining ring 1004 embedded in the annular connecting groove 1003 can enhance the sealing performance, thus avoiding the leakage of grease. In addition, the lip seal 7 embedded in the convex ring 6 can further enhance the sealing effect, and the lip seal 7 can prevent dust from entering. In this way, the use process of this grease rotary joint with sealed connection is completed.

[0024] The embodiments of the present utility model are given for purposes of illustration and description, and are not exhaustive or limit the present utility model to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better explain the principles of the present utility model and its practical applications, and to enable those of ordinary skill in the art to understand the present utility model so as to design various embodiments with various modifications suitable for specific purposes.

Claims

1. A sealed grease rotary joint, comprising an outer sleeve (1), an oil outlet joint (8) and an auxiliary docking assembly (10), characterized in that: A rotating bearing (2) is installed inside the outer sleeve (1), and sealing sleeves (3) are fixed on both the left and right sides of the outer sleeve (1). A sealing layer (4) is provided on the inner sides of the two sealing sleeves (3), and the sealing layer (4) is in a ring-shaped structure. A fixed connecting pipe (5) is fixed on one side of the left sealing sleeve (3). A convex ring (6) is fixed on the left outer side of the fixed connecting pipe (5) and the right outer side of the left sealing sleeve (3), and a lip-shaped sealing ring (7) is embedded in the convex ring (6). An oil outlet joint (8) is installed on the inner side of the rotating bearing (2), and an auxiliary docking assembly (10) is installed on the inner sides of the fixed connecting pipe (5) and the oil outlet joint (8).

2. A sealed grease rotary joint according to claim 1, characterized in that: There are three rotating bearings (2) distributed at equal distances, and each rotating bearing (2) is correspondingly provided with a bearing seal.

3. A sealed grease rotary joint according to claim 1, characterized in that: The auxiliary docking assembly (10) comprises an inner boss (1001), a connecting cavity (1002), an annular connecting groove (1003) and an elastic retaining ring (1004); the inner boss (1001) is fixedly connected to the fixed connecting pipe (5); the connecting cavity (1002) and the annular connecting groove (1003) are respectively arranged on the left and right sides of the inner boss (1001); and the elastic retaining ring (1004) is embedded in the annular connecting groove (1003).

4. A sealed grease rotary joint according to claim 3, characterized in that: The auxiliary docking assembly (10) further comprises a connecting inner tube (1005), the connecting inner tube (1005) being fixed on the inner side of one end of the oil outlet joint (8), and the size of the connecting inner tube (1005) matches that of the annular connecting groove (1003).

5. The sealed grease rotary joint according to claim 1, characterized in that: A pressure cover (9) is fixed to one side of the outside of the oil outlet joint (8), and the pressure cover (9) and the convex ring (6) are tightly fitted.

6. A sealed grease rotary joint according to claim 1, characterized in that: An oil inlet joint (11) is installed on the outside of the fixed connecting pipe (5), and the size of the oil inlet joint (11) matches that of the connecting cavity (1002). A docking plate (12) is fixed on one side of the outside of the oil inlet joint (11), and the docking plate (12) and the convex ring (6) are connected by bolts.

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