CN217633866U - Non-contact rotary sealing mechanism - Google Patents
Non-contact rotary sealing mechanism Download PDFInfo
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- CN217633866U CN217633866U CN202221260529.3U CN202221260529U CN217633866U CN 217633866 U CN217633866 U CN 217633866U CN 202221260529 U CN202221260529 U CN 202221260529U CN 217633866 U CN217633866 U CN 217633866U
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Abstract
The utility model relates to a non-contact rotary sealing mechanism, which comprises a rotary shaft, a bearing seat, a bearing end cover and a gas pipe joint; the rotating shaft comprises a first sealing part, a second sealing part and a bearing connecting part; an annular first sealing groove is formed in the end face of the first sealing part, one end of the second sealing part is fixedly connected with one end of the first sealing part, and one end of the bearing connecting part is fixedly connected with the other end of the second sealing part; the bearing sleeve is arranged on the position of the bearing connecting part close to the second sealing part; the bearing block is sleeved on the outer side of the rotating shaft, a sealing bulge is fixedly connected to the bearing block and positioned in the first sealing groove, an annular second sealing groove is formed in the inner side of the bearing block, the inner side of the bearing sleeve is fixedly connected with the outer ring of the bearing, and the bearing block is provided with an air hole which is communicated with the second sealing groove; the bearing end cover is fixedly connected with one end of the bearing seat close to the compression nut; the air pipe connector is fixedly connected with the bearing seat and communicated with the air holes.
Description
Technical Field
The utility model relates to a machine tool makes the field, concretely relates to non-contact rotary seal mechanism.
Background
For mechanical products, the more compact the structure, the better. Also, bearings that are rotatably supported in mechanical products are structurally required to have a seal to eliminate an additional seal assembly in order to ensure a compact structure. The bearing with the sealing device can be pre-filled with corresponding lubricating grease according to the use condition of the bearing so as to enhance the working function and prolong the service life. In the existing bearing, a sealing ring is generally fixed in a sealing groove of an outer ring of the bearing. The sealing ring is divided into a contact type sealing and a non-contact type sealing according to whether the sealing ring is contacted with the inner ring. The contact type sealing structure has good sealing effect but large friction torque, and is not suitable for high-speed occasions; the non-contact sealing structure has small friction torque but poor sealing effect, and is only suitable for occasions with better environment and low sealing requirement.
The existing sealing bearing applied to the working condition of high-speed rotation needs a non-contact structural form and requires a good sealing effect, and the existing sealing structure cannot meet the requirement.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a non-contact rotary seal mechanism to solve non-contact seal structure, sealed not good problem of effect.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a non-contact rotary sealing mechanism comprises a rotary shaft, a bearing seat, a bearing end cover and an air pipe joint; the rotating shaft comprises a first sealing part, a second sealing part and a bearing connecting part; an annular first sealing groove is formed in the end face of the first sealing part, one end of the second sealing part is fixedly connected with one end, provided with an annular groove, of the first sealing part, and one end of the bearing connecting part is fixedly connected with the other end of the second sealing part; the bearing sleeve is arranged at the position, close to the second sealing part, of the bearing connecting part, the other end of the bearing connecting part is in threaded connection with a compression nut, and the compression nut is used for fixing the second sealing part; the bearing block is sleeved on the outer side of the rotating shaft, a sealing bulge is fixedly connected to the bearing block, the sealing bulge is located in the first sealing groove, an annular second sealing groove is formed in the inner side, close to the second sealing part, of the bearing block, the inner side of the bearing block is fixedly connected with the outer ring of the bearing, a vent hole is formed in the bearing block, and the vent hole is communicated with the second sealing groove; the bearing end cover is fixedly connected with one end, close to the compression nut, of the bearing seat; the air pipe connector is fixedly connected with the bearing seat and communicated with the air holes.
Further, the number of the first seal groove and the seal protrusion is two.
Further, a gap is formed between the first sealing groove and the sealing bulge.
Further, the number of the second sealing grooves is multiple.
Further, the compression nut is a precision nut.
Furthermore, the bearing end cover and one end of the bearing seat close to the compression nut are fixedly connected through a bolt.
The utility model has the advantages that:
through first seal groove and the protruding cooperation of sealed, realize labyrinth seal, aerify in to the second seal groove through the air pipe connection for the air is spout in the gap between bearing frame and the rotation axis, thereby realized the atmospheric pressure and sealed, when rotation axis quiescent condition, through aerifing in the gap between bearing frame and the rotation axis, prevent that impurity from entering into on the bearing, realize sealed, when rotation axis rotation state, can form the vortex in the second seal groove, can realize sealed equally. The labyrinth seal and the positive pressure seal are combined, dynamic and static non-contact seal can be achieved, the higher the rotating speed is, the better the sealing effect is, the lower the friction damping is, the output torque of the motor can be ensured to the maximum extent, and meanwhile, the bearing failure caused by the seal can be effectively reduced.
Drawings
FIG. 1 is a schematic view of the overall structure of a non-contact rotary seal mechanism;
fig. 2 is a schematic cross-sectional structure diagram of a non-contact rotary sealing mechanism.
Names corresponding to the marks in the figure:
11-a first seal; 12-a second seal; 13-a bearing connection; 14-a first seal groove; 2-a bearing; 3-bearing seat; 31-sealing projection; 32-a second seal groove; 4-pressing the nut; 5-bearing end cap; 6-air pipe joint.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
The embodiment of the utility model provides a:
referring to fig. 1-2, a non-contact rotary seal mechanism comprises a rotary shaft, a bearing 2, a bearing seat 3, a bearing end cover 5 and a gas pipe joint 6; the rotating shaft comprises a first sealing part 11, a second sealing part 12 and a bearing connecting part 13; an annular first sealing groove 14 is formed in the end face of the first sealing part 11, one end of the second sealing part 12 is fixedly connected with one end, provided with an annular groove, of the first sealing part 11, and one end of the bearing connecting part 13 is fixedly connected with the other end of the second sealing part 12; the bearing 2 is sleeved on the position, close to the second sealing part 12, of the bearing connecting part 13, the other end of the bearing connecting part 13 is in threaded connection with the compression nut 4, and the compression nut 4 is used for fixing the second sealing part 12; the bearing seat 3 is sleeved on the outer side of the rotating shaft, a sealing bulge 31 is fixedly connected to the bearing seat 3, the sealing bulge 31 is located in the first sealing groove 14, an annular second sealing groove 32 is formed in the inner side, close to the second sealing part 12, of the bearing seat 3, the inner side of the bearing 2 sleeve is fixedly connected with the outer ring of the bearing 2, a vent hole is formed in the bearing seat 3, and the vent hole is communicated with the second sealing groove 32; the bearing end cover 5 is fixedly connected with one end of the bearing seat 3 close to the compression nut 4; the air pipe joint 6 is fixedly connected with the bearing seat 3, and the air pipe joint 6 is communicated with the air holes.
Through the cooperation of first seal groove 14 and sealed arch 31, realize labyrinth seals, aerify in to second seal groove 32 through air pipe connector 6, make the air spout in the gap between bearing frame 3 and the rotation axis, thereby realized the atmospheric pressure seal, when rotation axis quiescent condition, through aerifing in the gap between bearing frame 3 and the rotation axis, prevent that impurity from entering into on the bearing 2, realize sealedly, when the rotation axis rotation state, can form the vortex in second seal groove 32, can realize sealedly equally. The labyrinth seal and the positive pressure seal are combined, dynamic and static non-contact seal can be achieved, the higher the rotating speed is, the better the sealing effect is, the lower the friction damping is, the output torque of the motor can be ensured to the maximum extent, and meanwhile, the failure of the bearing 2 caused by the seal can be effectively reduced.
The number of the first sealing grooves 14 and the sealing protrusions 31 is two, so that the sealing effect is better.
A gap is formed between the first sealing groove 14 and the sealing protrusion 31, so that the rotating shaft and the bearing seat 3 are not in direct contact, and friction is reduced.
The number of the second sealing grooves 32 is three, so that the sealing effect is better.
The compression nut 4 adopts a precision nut which can more effectively prevent the bearing 2 from loosening.
And the bearing end cover 5 is fixedly connected with one end of the bearing seat 3 close to the compression nut 4 by adopting a bolt. The bolt fastening makes it easier to dismount the bearing end cap 5.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.
Claims (6)
1. A non-contact rotary sealing mechanism is characterized by comprising a rotary shaft, a bearing seat, a bearing end cover and an air pipe joint;
the rotating shaft comprises a first sealing part, a second sealing part and a bearing connecting part; an annular first sealing groove is formed in the end face of the first sealing part, one end of the second sealing part is fixedly connected with one end, provided with an annular groove, of the first sealing part, and one end of the bearing connecting part is fixedly connected with the other end of the second sealing part;
the bearing sleeve is arranged at the position, close to the second sealing part, of the bearing connecting part, the other end of the bearing connecting part is in threaded connection with a compression nut, and the compression nut is used for fixing the second sealing part;
the bearing block is sleeved on the outer side of the rotating shaft, a sealing bulge is fixedly connected to the bearing block and positioned in the first sealing groove, an annular second sealing groove is formed in the inner side, close to the second sealing part, of the bearing block, the inner side of the bearing block is fixedly connected with the outer ring of the bearing, a vent hole is formed in the bearing block, and the vent hole is communicated with the second sealing groove;
the bearing end cover is fixedly connected with one end, close to the compression nut, of the bearing seat;
the air pipe connector is fixedly connected with the bearing seat and communicated with the air holes.
2. The non-contact rotary seal mechanism of claim 1 wherein said first seal groove and said seal projection are two in number.
3. The non-contact rotary seal mechanism of claim 1 wherein said first seal groove is spaced from said seal lobe.
4. The non-contact rotary seal mechanism of claim 1 wherein said second seal groove is plural in number.
5. The non-contact rotary seal mechanism of claim 1 wherein said compression nut is a precision nut.
6. The non-contact rotary seal mechanism of claim 1 wherein the bearing end cap is fixedly connected to the end of the bearing housing adjacent to the compression nut by a bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221260529.3U CN217633866U (en) | 2022-05-23 | 2022-05-23 | Non-contact rotary sealing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221260529.3U CN217633866U (en) | 2022-05-23 | 2022-05-23 | Non-contact rotary sealing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217633866U true CN217633866U (en) | 2022-10-21 |
Family
ID=83656325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221260529.3U Active CN217633866U (en) | 2022-05-23 | 2022-05-23 | Non-contact rotary sealing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217633866U (en) |
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2022
- 2022-05-23 CN CN202221260529.3U patent/CN217633866U/en active Active
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