CN213018268U

CN213018268U - Central authorities' swivel joint seal structure

Info

Publication number: CN213018268U
Application number: CN202021740284.5U
Authority: CN
Inventors: 杨慎伟; 曹守国; 秦士河; 廉庆慧; 赵志忠
Original assignee: SHANDONG DORSON HYDRAULIC CO Ltd
Current assignee: SHANDONG DORSON HYDRAULIC CO Ltd
Priority date: 2020-08-19
Filing date: 2020-08-19
Publication date: 2021-04-20
Anticipated expiration: 2030-08-19

Abstract

The utility model discloses a sealing structure of a central rotary joint, which comprises a rotary shell, a rotary shaft and a sealing assembly, wherein the rotary shaft is transversely movably arranged in the rotary shell, bearing grooves are vertically formed at two ends in the rotary shell, a ball bearing is vertically fixedly connected in each bearing groove, and a sleeve is transversely fixedly connected in an inner ring of each ball bearing; a plurality of oil way interfaces penetrating into the rotary shell are equidistantly arranged on the surface of the rotary shell, a circle of annular sealing groove is respectively arranged on the inner wall of the rotary shell at two sides of each oil way interface, and a sealing assembly is arranged in each sealing groove; the utility model has simple structure, and solves the problem of poor stability and sealing performance of the existing central swivel joint during rotation through the sleeve, the ball bearing and the sealing retainer ring; through seal assembly and O type circle, solved the short problem of current central authorities swivel joint life-span.

Description

Central authorities' swivel joint seal structure

Technical Field

The utility model relates to a central authorities 'swivel joint sealed technical field especially relates to a central authorities' swivel joint seal structure.

Background

As the engineering machinery industry is rapidly developed at home in recent years, the central swivel joint belongs to an important part in hydraulic parts of large-scale engineering machinery, plays an important role in connecting an upper hydraulic pipeline and a lower hydraulic pipeline, and plays an especially important role in the stable rotation of the engineering machinery and the smoothness of an oil way; the existing central swivel joint has the following problems when in use: (1) the existing central rotary joint has poor stability and sealing performance during rotation, so that the problem of oil leakage of the central rotary joint is easy to occur; (2) the sealing structure in the existing central swivel joint is easy to wear, so that the sealing performance is low, and the service life of the central swivel joint is shortened; therefore, there is a need for an improved optimization of the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a central authorities' swivel joint seal structure in order to solve the not good shortcoming of practicality that exists among the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a sealing structure of a central rotary joint comprises a rotary shell, a rotary shaft and a sealing assembly, wherein the rotary shell is horizontally arranged in a cylindrical shape, a circular blocking plate is vertically arranged at an opening at one end of the rotary shell, the rotary shaft is transversely and movably arranged in the rotary shell, bearing grooves are vertically formed in two ends in the rotary shell, a ball bearing is vertically and fixedly connected in each bearing groove, a sleeve is transversely and fixedly connected in an inner ring of each ball bearing, and two ends of a shaft body of the rotary shaft are fixedly inserted in the sleeves; the surface of the rotary shell is equidistantly provided with a plurality of oil way interfaces penetrating into the rotary shell, the inner walls of the rotary shell on two sides of each oil way interface are respectively provided with a circle of annular sealing grooves, and each sealing groove is internally provided with a sealing assembly.

Preferably, a circle of annular oil collecting grooves are formed in both sides of the middle of the rotating shaft body, and the oil collecting grooves are vertically and correspondingly formed in the inner ends of the oil way interfaces; and O-shaped rings are fixedly sleeved on the rotating shaft bodies on the two sides of each oil collecting groove.

Preferably, seal assembly includes first sealing washer, second sealing washer, ball and rubber column, at every equal vertical rigid coupling has annular first sealing washer in the seal groove, at every equal vertical activity is equipped with the second sealing washer on the medial surface of first sealing washer, at every round annular cavity has all been seted up to both sides in the first sealing washer, every equal equidistance activity is equipped with a plurality of balls in the annular cavity, at every round annular strip opening has all been seted up to annular cavity's interior bottom surface, at every equidistant rigid coupling has the rubber column of a plurality of perpendicular to second sealing washers in the second sealing washer outer lane, every the one end of rubber column all extends into the annular cavity through the strip opening, and every the one end that the rubber column is located the annular cavity is respectively with every ball rigid coupling.

Preferably, a circle of arc-shaped extrusion groove is formed in the inner ring of each second sealing ring in a matched mode with the O-shaped ring; and a sealing check ring is fixedly sleeved on the rotating shaft body at the inner side of each sleeve.

Preferably, a plurality of circular oil outlet holes are formed in the surface of the rotating shaft in the oil collecting tank at equal intervals; and one end of the rotating shaft is coaxially and fixedly connected with a vertically arranged flange.

Preferably, a plurality of threaded holes are transversely formed in the edge of one side face of the plugging plate at equal intervals, a locking bolt is spirally connected in each threaded hole, an oil drainage pipe is transversely arranged in the rotating shaft, and one end of the oil drainage pipe penetrates out of the middle part of the handle plate body of the plugging plate; the side wall of one end of the rotary shell is provided with a plurality of thread grooves in a matched mode through locking bolts, and the inner end of each locking bolt is spirally connected into each thread groove.

Compared with the prior art, the beneficial effects of the utility model are that: in the utility model, the water-saving device is provided with a water-saving valve,

1. the stability of the rotating shaft in the rotating shell is effectively improved through the sleeve and the ball bearing; the sealing ring is convenient to prevent the occurrence of large abrasion of the sealing ring caused by axial deviation of the rotating shaft, the smoothness of the rotating shaft during rotation is effectively improved, and hydraulic oil is convenient to prevent from overflowing into the bearing groove through the sealing retainer ring; the problem that the existing central rotary joint is poor in stability and sealing performance during rotation is solved;

2. the sealing assembly is matched with the O-shaped ring, so that the abrasion of the sealing ring caused by the rotation of the rotating shaft is reduced conveniently, and the sealing performance of the central rotating joint during the rotation is facilitated; thereby effectively preventing the central swivel joint from being unusable due to poor sealing performance; effectively prolonged central authorities swivel joint's life, solved current central authorities swivel joint and leaded to the problem that life shortens because of the leakproofness is not good.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limitation. In the drawings:

fig. 1 is a schematic view of a front view structure provided by the present invention;

fig. 2 is a schematic view of a front view cross-sectional structure provided by the present invention;

fig. 3 is an enlarged schematic view of a portion a in fig. 2 according to the present invention;

fig. 4 is a schematic top view of a cross-sectional structure of a first sealing ring and a second sealing ring of the present invention;

number in the figure: the oil-gas separation device comprises a rotary shell 1, a rotary shaft 2, a sleeve 3, a ball bearing 4, an oil way interface 5, a plugging plate 6, a locking bolt 7, an oil drain pipe 8, an oil collecting tank 9, an O-shaped ring 10, a sealing retainer ring 11, a sealing groove 12, a first sealing ring 13, a second sealing ring 14, a round ball 15, a rubber column 16, a flange plate 17 and an oil outlet 18.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Example 1: referring to fig. 1-4, a central swivel joint sealing structure in the present invention includes a swivel housing 1, a swivel shaft 2 and a sealing assembly, wherein the swivel housing 1 is horizontally arranged in a cylindrical shape, a circular blocking plate 6 is vertically arranged at an opening at one end of the swivel housing 1, the swivel shaft 2 is horizontally movably arranged in the swivel housing 1, bearing grooves are vertically arranged at two ends in the swivel housing 1, a ball bearing 4 is vertically fixedly connected in each bearing groove, a sleeve 3 is horizontally fixedly connected in an inner ring of each ball bearing 4, and two ends of a shaft body of the swivel shaft 2 are fixedly inserted in the sleeve 3; the surface of the rotary shell 1 is equidistantly provided with a plurality of oil way interfaces 5 penetrating into the rotary shell 1, the inner walls of the rotary shell 1 at two sides of each oil way interface 5 are respectively provided with a circle of annular sealing grooves 12, and each sealing groove 12 is internally provided with a sealing assembly.

In the utility model, the sealing component comprises a first sealing ring 13, a second sealing ring 14, a round ball 15 and a rubber column 16, an annular first sealing ring 13 is vertically and fixedly connected in each sealing groove 12, a second sealing ring 14 is vertically and movably arranged on the inner side surface of each first sealing ring 13, a circle of annular cavity is arranged on both sides in each first sealing ring 13, a plurality of round balls 15 are movably arranged in each annular cavity at equal intervals, a circle of annular strip-shaped opening is formed in the inner bottom surface of each annular cavity, a plurality of rubber columns 16 perpendicular to the second sealing rings 14 are fixedly connected to the outer rings of the second sealing rings 14 at equal intervals, one end of each rubber column 16 extends into the annular cavity through the strip-shaped opening, one end of each rubber column 16 positioned in the annular cavity is fixedly connected with each round ball 15; the sealing assembly is matched with the O-shaped ring 10, so that the abrasion of the sealing ring caused by the rotation of the rotary shaft 2 is reduced, and the sealing performance of the central rotary joint during rotation is facilitated; thereby effectively preventing the central swivel joint from being unusable due to poor sealing performance; effectively prolongs the service life of the central swivel joint.

In the utility model, two sides of the middle part of the shaft body of the revolving shaft 2 are both provided with a circle of annular oil collecting grooves 9, and the oil collecting grooves 9 at the inner ends of the oil circuit interfaces 5 are vertically arranged correspondingly; an O-shaped ring 10 is fixedly sleeved on the shaft body of the rotating shaft 2 on two sides of each oil collecting groove 9; an arc-shaped extrusion groove is formed in the inner ring of each second sealing ring (14) in a matched mode with the O-shaped ring (10); a sealing retainer ring 11 is fixedly sleeved on the shaft body of the rotating shaft 2 at the inner side of each sleeve 3; a plurality of circular oil outlet holes 18 are formed in the surface of the rotating shaft 2 in the oil collecting tank 9 at equal intervals; a vertically arranged flange plate 17 is coaxially and fixedly connected with one end of the rotating shaft 2; a plurality of threaded holes are transversely formed in the edge of one side face of the blocking plate 6 at equal intervals, a locking bolt 7 is spirally connected in each threaded hole, an oil drainage pipe 8 is transversely arranged in the rotating shaft 2, and one end of the oil drainage pipe 8 penetrates out of the middle part of the plate body of the blocking plate 6; the side wall of one end of the rotary shell 1 is provided with a plurality of thread grooves matched with the locking bolts 7, and the inner end of each locking bolt 7 is spirally connected in each thread groove.

Example 2: when the utility model is used, the flange 17 is firstly used for fixing the revolving shaft 2, and then the oil circuit control device is respectively connected into each oil circuit interface 5; then the rotary shell 1 is fixedly connected with the upper structure; the oil drain pipe 8 is connected with an external oil return tank; then, hydraulic oil is filled into the oil filling pore channel in the rotating shaft 2, and then the hydraulic oil enters the oil collecting tank 9 through the oil outlet hole 18; then, when the rotating shaft 2 rotates, the stability of the rotating shaft 2 in rotation in the rotating shell 1 is effectively improved through the sleeve 3 and the ball bearing 4; the sealing ring is convenient to prevent the situation that the sealing ring is greatly abraded due to the axial deviation of the rotating shaft 2, the smoothness of the rotating shaft 2 during rotation is effectively improved, and the hydraulic oil is convenient to prevent from overflowing into the bearing groove through the sealing retainer ring 11; the problem that the existing central rotary joint is poor in stability and sealing performance during rotation is solved;

the O-shaped ring 10 and the sealing retainer ring 11 on the rotating shaft 2 are convenient to effectively improve the sealing performance of the rotating shaft 2 during rotation; the first sealing ring 13 and the second sealing ring 14 are arranged in a separated mode; the abrasion of the second sealing ring 14 caused by the rotation of the rotary shaft 2 is effectively reduced, so that the sealing performance in the rotary shell 1 is reduced; the second sealing ring 14 is matched with the O-shaped ring 10 to form an arc-shaped extrusion groove, so that the sealing property between the second sealing ring 14 and the O-shaped ring 10 is effectively improved, and the hydraulic oil is prevented from overflowing from the gap; the sealing assembly is matched with the O-shaped ring 10, so that the abrasion of the sealing ring caused by the rotation of the rotary shaft 2 is reduced, and the sealing performance of the central rotary joint during rotation is facilitated; thereby effectively preventing the central swivel joint from being unusable due to poor sealing performance; the service life of the central rotary joint is effectively prolonged, and the reliability of the central rotary joint in use is improved; the problem of current central authorities rotary joint inner seal structure's the not good leakproofness is solved.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a central authorities swivel joint seal structure, includes gyration casing (1), pivot (2) and seal assembly, its characterized in that: the rotary shell (1) is horizontally arranged in a cylindrical shape, a round blocking plate (6) is vertically arranged at an opening at one end of the rotary shell (1), the rotary shaft (2) is transversely and movably arranged in the rotary shell (1), bearing grooves are vertically formed in two ends of the rotary shell (1), a ball bearing (4) is vertically and fixedly connected in each bearing groove, a sleeve (3) is transversely and fixedly connected in an inner ring of each ball bearing (4), and two ends of a shaft body of the rotary shaft (2) are fixedly inserted in the sleeve (3); the surface of the rotary shell (1) is equidistantly provided with a plurality of oil way connectors (5) penetrating into the rotary shell (1), the inner walls of the rotary shell (1) on two sides of each oil way connector (5) are respectively provided with a circle of annular sealing grooves (12), and each sealing groove (12) is internally provided with a sealing assembly.

2. A central swivel joint seal arrangement according to claim 1, wherein: a circle of annular oil collecting grooves (9) are formed in both sides of the middle of the shaft body of the rotating shaft (2), and the oil collecting grooves (9) are vertically and correspondingly formed in the inner ends of the oil way interfaces (5); and O-shaped rings (10) are fixedly sleeved on the shaft bodies of the rotating shafts (2) on two sides of each oil collecting groove (9).

3. A central swivel joint seal arrangement according to claim 1, wherein: the sealing component comprises a first sealing ring (13), a second sealing ring (14), a round ball (15) and a rubber column (16), an annular first sealing ring (13) is vertically and fixedly connected in each sealing groove (12), a second sealing ring (14) is vertically and movably arranged on the inner side surface of each first sealing ring (13), a circle of annular cavity is arranged on both sides in each first sealing ring (13), a plurality of round balls (15) are movably arranged in each annular cavity at equal intervals, a circle of annular strip-shaped opening is formed in the inner bottom surface of each annular cavity, a plurality of rubber columns (16) perpendicular to the second sealing rings (14) are fixedly connected to the outer ring of each second sealing ring (14) at equal intervals, one end of each rubber column (16) extends into the annular cavity through the strip-shaped opening, and one end of each rubber column (16) positioned in the annular cavity is fixedly connected with each round ball (15) respectively.

4. A central swivel joint seal arrangement according to claim 3, wherein: an arc-shaped extrusion groove is formed in the inner ring of each second sealing ring (14) in a matched mode with the O-shaped ring (10); and a sealing retainer ring (11) is fixedly sleeved on the shaft body of the rotating shaft (2) at the inner side of each sleeve (3).

5. A central swivel joint seal arrangement according to claim 2, wherein: a plurality of round oil outlet holes (18) are formed in the surface of the rotating shaft (2) in the oil collecting tank (9) at equal intervals; one end of the rotating shaft (2) is coaxially and fixedly connected with a vertically arranged flange plate (17).

6. A central swivel joint seal arrangement according to claim 1, wherein: a plurality of threaded holes are transversely formed in the edge of one side face of the blocking plate (6) at equal intervals, a locking bolt (7) is spirally connected in each threaded hole, an oil drainage pipe (8) is transversely arranged in the rotating shaft (2), and one end of the oil drainage pipe (8) penetrates out of the middle part of the plate body of the blocking plate (6); a plurality of thread grooves are formed in the side wall of one end of the rotary shell (1) in a matched mode with the locking bolts (7), and the inner end of each locking bolt (7) is spirally connected into each thread groove.