CN209990905U

CN209990905U - Easy-to-maintain rotary sealing joint with axial positioning function

Info

Publication number: CN209990905U
Application number: CN201821767150.5U
Authority: CN
Inventors: 郑义吉; 刘培柱; 张思勤
Original assignee: China Petrochemical Corp
Current assignee: China Petroleum and Chemical Corp; China Petrochemical Corp
Priority date: 2018-10-29
Filing date: 2018-10-29
Publication date: 2020-01-24
Anticipated expiration: 2028-10-29

Abstract

The utility model discloses a rotary seal joint of easy maintenance with axial positioning, install two bearings side by side in rotary seal joint's casing, two bearing support live rotary seal joint's pivot, separate the formation interval through the spacer between two bearings, the pipe form connector of outer end for being equipped with the external screw thread of pivot, the ball of two bearings exposes from the terminal surface in the face of each other of two bearings respectively, be equipped with first grease adding mouth on the corresponding casing in interval between two bearings, the afterbody of connector is equipped with spacing bulge loop, the terminal surface of spacing bulge loop towards the front end of connector is the spacing plane with the axle center vertically of connector, the utility model discloses long service life.

Description

Easy-to-maintain rotary sealing joint with axial positioning function

Technical Field

The present invention relates to a rotary seal joint, and more particularly to a rotary seal joint with axial positioning and easy maintenance.

Background

The field of application of rotary seal joints covers almost every manufacturing industry. The rotary sealing joint is a joint with double sealing bearings, namely a left bearing and a right bearing, and the rotary sealing joint is frequently damaged due to the fact that the bearings lack grease during continuous operation and cannot meet the requirement of long-period operation of equipment.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an easily maintained rotary seal joint with axial positioning is provided.

Solve above-mentioned technical problem, the utility model discloses a technical scheme as follows:

the utility model provides a rotary seal joint of easy maintenance with axial positioning, install two bearings side by side in rotary seal joint's casing, rotary seal joint's pivot is lived to two bearing support, separate through the spacer and form the interval between two bearings, the outer end of pivot is the pipe form connector that is equipped with the external screw thread, the ball of two bearings exposes from the terminal surface that faces mutually of two bearings respectively, be equipped with first grease adding mouth on the casing that the interval between two bearings is corresponding, the afterbody of connector is equipped with spacing bulge loop, the terminal surface of spacing bulge loop towards the front end of connector is the spacing plane with the axle center vertically of connector.

In the use process of the rotary sealing joint, the bearings bear most of force, and if lubrication is insufficient, the service life of the rotary sealing joint is easily influenced, so that lubricating oil added from the first grease adding port flows into the balls from the end faces, facing to each other, of the two bearings through the first grease adding port, and the bearings are fully lubricated. The limiting convex ring can position a rotating shaft of an external device connected with the connector, and the swinging caused by the misalignment of the axis between the rotating shaft of the external device and the connector is avoided.

Furthermore, a sealing ring connected with the inner end of the rotating shaft is further arranged in the shell, and a second grease adding port is formed in the shell corresponding to the joint of the sealing ring and the rotating shaft.

Lubricating oil fed from the second grease adding port can lubricate the space between the seal ring and the rotating shaft.

Furthermore, the end surfaces of the two bearings facing to the two sides are provided with dustproof covers for preventing dust from entering the bearings from the side surfaces.

Furthermore, the thickness of spacing bulge loop is 3 mm.

Further, the housing is made of an aluminum alloy material.

Furthermore, an annular groove is arranged between the connector and the limiting convex ring.

Further, the first grease adding port and the second grease adding port are located on the same side.

Furthermore, the inlets of the first grease adding port and the second grease adding port are both in a horn shape.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses expose the ball of two bearings respectively from the terminal surface that faces mutually of two bearings to be equipped with first greasing mouth on the corresponding casing in interval between two bearings, make from the lubricating grease that first greasing mouth added can follow between the ball that the interval got into two bearings, reach lubricated effect to the ball, first greasing mouth makes the workman maintain inside the rotary seal joint more easily, has prolonged rotary seal joint's life.

2. The utility model discloses still set up spacing bulge loop simultaneously at the afterbody of connector, after the external screw thread connection of connector is passed through in the pivot of external device and this rotary seal joint's pivot, the terminal surface of external device's pivot will hug closely on the spacing plane of spacing bulge loop, realize axial positioning, axial positioning to the pivot of external device through external screw thread and spacing plane for the pivot of rotary seal joint can be better aligns with external device's pivot, avoided because of the not swing condition that leads to the fact of the axle center is not aligned.

3. Lubricating oil fed from the second grease adding port can lubricate the space between the seal ring and the rotating shaft.

4. The dust cover prevents dust from entering the bearing from the side.

Drawings

Fig. 1 is a cross-sectional view of an easy to maintain rotary seal joint with axial positioning of the present invention.

The reference numerals in the drawings mean:

1-a shell; 2-a sealing ring; 3-a second grease adding port; 4-a first grease adding port; 5-a rotating shaft; 6-a limit convex ring; 7-external threads; 8-a connector; 9-end faces facing both sides; 10-facing end faces; 11-spacer bush; 12-a bearing; 13-limit plane.

Detailed Description

The first embodiment is as follows:

as shown in figure 1, the rotary sealing joint with axial positioning and easy maintenance is characterized in that two bearings 14 are arranged in a shell 1 of the rotary sealing joint side by side and support a rotating shaft 5 of the rotary sealing joint, the outer end of the rotating shaft 5 is a circular tubular connector 8 provided with external threads 7, the connector 8 is used for being connected with a rotating shaft of an external device, and the shell 1 is made of an aluminum alloy material.

The two bearings 14 are separated by the spacer 11 to form a space, the opposite end faces 10 of the two bearings are not provided with dust covers, so that the balls of the two bearings 12 are exposed to the outside from the opposite end faces 10 of the two bearings respectively, lubricating grease can enter the balls through the space, and the shell 1 corresponding to the space between the two bearings 12 is provided with a first grease adding port 4. And a sealing ring 2 connected with the inner end of the rotating shaft 5 is further arranged in the shell, and a second grease adding port 3 is arranged on the shell 1 corresponding to the joint of the sealing ring 2 and the rotating shaft 5. The utility model discloses a first grease adding mouth 4 and second add fat mouth 3 and made things convenient for the inside maintenance of workman's pairing rotation sealing joint, in the use, keep adding fat mouth 4 and second and adding fat mouth 3 and adding lubricating grease to first, reducible rotary seal joint's wearing and tearing prolong rotary seal joint's life, guarantee the long period running of unit. First currying mouth and second currying mouth lie in same one side, all lie in rotary seal joint's upside, and the import of first currying mouth and second currying mouth is loudspeaker form.

The tail part of the connector 8 is provided with a limiting convex ring 6, the end surface of the limiting convex ring 6 facing the front end of the connector 8 is a limiting plane 13 vertical to the axis of the connector, and the thickness of the limiting convex ring 6 is 3 mm. The pivot of external device screws into from the head of connector 8, and when the complete connection was screwed up, the terminal surface and the spacing plane 13 of external device's pivot were flat paste to keep certain pressure to spacing plane 13, reach further spacing effect, realize axial positioning, make two pivots keep coaxial, reduce and shake and get. An annular groove is arranged between the connector and the limiting convex ring.

Example two:

the main difference between the easy-to-maintain rotary seal joint with axial positioning of the second embodiment and the easy-to-maintain rotary seal joint with axial positioning of the first embodiment is that: the end faces 9 of the two bearings 14 facing to the two sides are provided with dust covers which can prevent dust from entering the bearings from the side, and the service life of the bearings is prolonged. The remaining structure of the easy-to-maintain rotary seal joint with axial positioning of the second embodiment is the same as that of the easy-to-maintain rotary seal joint with axial positioning of the first embodiment.

The above embodiments of the present invention are not right the utility model discloses the limited protection scope, the utility model discloses an embodiment is not limited to this, all kinds of basis according to the above-mentioned of the utility model discloses an under the above-mentioned basic technical thought prerequisite of the utility model, right according to ordinary technical knowledge and the conventional means in this field the modification, replacement or the change of other multiple forms that above-mentioned structure made all should fall within the protection scope of the utility model.

Claims

1. The utility model provides a rotary seal joint who easily maintains with axial positioning install two bearings side by side in rotary seal joint's the casing, two bearing support live rotary seal joint's pivot, separate through the spacer formation interval between two bearings, the outer end of pivot is for being equipped with the pipe form connector of external screw thread, its characterized in that: the ball of two bearings is followed respectively the terminal surface that faces mutually of two bearings exposes interval between two bearings is corresponding be equipped with first grease adding mouth on the casing, the afterbody of connector is equipped with spacing bulge loop, spacing bulge loop towards the terminal surface of the front end of connector be with the axle center vertically spacing plane of connector.

2. The easy to maintain rotary seal joint with axial positioning of claim 1, wherein: and a sealing ring connected with the inner end of the rotating shaft is further arranged in the shell, and a second grease adding port is formed in the shell corresponding to the joint of the sealing ring and the rotating shaft.

3. An easily serviceable rotary seal joint with axial positioning as set forth in claim 1 or 2 wherein: and the end surfaces of the two bearings facing to the two sides are provided with dustproof covers for preventing dust from entering the bearings from the side surfaces.

4. The easy to maintain rotary seal joint with axial positioning of claim 1, wherein: the thickness of spacing bulge loop is 3 mm.

5. The easy to maintain rotary seal joint with axial positioning of claim 1, wherein: the shell is made of an aluminum alloy material.

6. The easy to maintain rotary seal joint with axial positioning of claim 1, wherein: an annular groove is arranged between the connector and the limiting convex ring.

7. The easy to maintain rotary seal joint with axial positioning of claim 2, wherein: the first grease adding port and the second grease adding port are located on the same side.

8. An easily serviceable rotary seal joint with axial positioning as set forth in claim 2 or 7 wherein: and inlets of the first grease adding port and the second grease adding port are both in a horn shape.