CN204004331U - Gear reduction unit high speed shaft noncontact seal device - Google Patents
Gear reduction unit high speed shaft noncontact seal device Download PDFInfo
- Publication number
- CN204004331U CN204004331U CN201420389234.5U CN201420389234U CN204004331U CN 204004331 U CN204004331 U CN 204004331U CN 201420389234 U CN201420389234 U CN 201420389234U CN 204004331 U CN204004331 U CN 204004331U
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- CN
- China
- Prior art keywords
- high speed
- speed shaft
- ring
- bearing housing
- gear reduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model discloses a kind of gear reduction unit high speed shaft noncontact seal device, comprise high speed shaft, seal ring, transparent cover, stationary ring, rotating ring, drain pan, bearing and bearing housing, its middle (center) bearing is installed in bearing housing, transparent cover is fixed on the outer end of bearing housing and has the lower edge that stretches into bearing housing, between lower edge and bearing, be pressed with stationary ring, the rotating ring that is connected on high speed shaft, stationary ring and rotating ring form axial labyrinth; Seal ring is connected on high speed shaft, on the periphery wall of seal ring, have annular groove, the opening of seal ring and transparent cover forms radial labyrinth, between radial labyrinth and axial labyrinth, has cavity, on the inwall of lower edge and bearing housing, have axial drain pan, drain pan is communicated with cavity and box house.Mechanical structure of the present utility model is simple, easily processes and assembles, and cost is low, and can realize reliable sealing effect.
Description
Technical field
The utility model relates to a kind of shaft sealer, is specifically related to a kind of gear reduction unit high speed shaft noncontact seal device.
Background technique
Wheel speed reducer is widely used as gear drive, by different gear reduction ratio parameter designing, reaches the running rotating speed requirement of driven operation mechanism.Its input shaft is general is connected driving with motor (or oil hydraulic motor etc.) original machine output shaft by coupling, and rotating speed is higher, is generally called high speed shaft.
High speed shaft is supported by bearings at both ends, bearing adopts oil lubrication, for preventing oil leak, need sealing mechanism with original machine output shaft connecting end, the contact seal that sealing configuration generally adopts rubber rotating seal ring (oil sealing) and high speed shaft to form, or disc and rubber rotating seal ring (oil sealing) combination seal mode.
In gear reduction unit operation process, often because of the quality of rubber rotating seal ring (oil sealing) own, reliable life and installation question, cause seal failure and leak.And rubber rotating seal ring was when losing efficacy necessary replacing, need dismounting half-coupling (coupling is is generally connected and composed by two half-couplings), limited by installing space, take gear reduction box apart, high speed shaft is split out to rear maintenance, or mobile motor (prime mover), just can complete more and change jobs.Cause the workload of replacing larger, engineering time is long, and can cause shutdown loss.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the utility model provides a kind of high durability, non-maintaining gear reduction unit high speed shaft noncontact seal device.
Technological scheme: for solving the problems of the technologies described above, the gear reduction unit high speed shaft noncontact seal device that the utility model provides comprises high speed shaft, bearing, bearing housing and transparent cover, described bearing housing is fixed on gear reduction box body, described bearing is installed in bearing housing, described transparent cover is fixed on the outer end of bearing housing, and described transparent cover has the lower edge that stretches into bearing housing, between described lower edge and bearing, is pressed with stationary ring, the rotating ring that is connected on described high speed shaft, described stationary ring and rotating ring form axial labyrinth; Seal ring is connected on described high speed shaft, on the periphery wall of described seal ring, there is annular groove, the opening of described seal ring and transparent cover forms radial labyrinth, between described radial labyrinth and axial labyrinth, there is cavity, on the inwall of described lower edge and bearing housing, have axial drain pan, described drain pan is communicated with cavity and box house.
The utility model further improves, described rotating ring comprises upper ring body and lower ring body, the external diameter of described upper ring body is greater than the external diameter of described seal ring, between the outer edge of described upper ring body and described lower edge, there is the first gap, between the lower surface of described upper ring body and the upper surface of described stationary ring, there is the second gap, between the outer surface of described lower ring body and the endoporus of stationary ring, have third space, described axial labyrinth is comprised of the first gap, the second gap and third space.
It is that described rotating ring has internal thread, has the outside thread mating with internal thread on described high speed shaft that the utility model further improves.
It is that described seal ring and high speed shaft are interference fit or transition fit that the utility model further improves.
It is that described annular groove is parallel equally spaced 3 that the utility model further improves again.
Beneficial effect: the utility model adopts radial labyrinth and axial labyrinth to form two contactless sealing configurations by the utility model; and by drain pan, cavity is between the two communicated with box house; mechanical structure is simple; easily processing and assembling; cost is low; and can realize reliable sealing effect, and can realize non-maintaining work, while avoiding because of rubber rotating seal ring (oil sealing) seal failure, change the shutdown loss causing.The significant difference of further utilizing radial labyrinth and axial labyrinth linear velocity, progressively declines pressure from inside to outside, allows drain pan possess the flow tendency of ecto-entad, can effectively stop lubricant oil to external diffusion.
The technical problem solving except the utility model recited above is, the technical characteristics that forms technological scheme and the advantage brought by the technical characteristics of these technological schemes, the advantage that the other technologies feature comprising in the other technologies problem that gear reduction unit high speed shaft non-contacting sealing structure of the present utility model can solve, technological scheme and these technical characteristicss bring, is described in more detail in connection with accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment's structural representation;
Fig. 2 is the A-A view of Fig. 1;
Fig. 3 is the erection drawing of Fig. 1;
Fig. 4 is the use phase diagram of Fig. 1.
Embodiment
Embodiment: the gear reduction unit high speed shaft noncontact seal device of the present embodiment as depicted in figs. 1 and 2, comprises half-coupling 1, key 2, high speed shaft 3, seal ring 4, transparent cover 5, stationary ring 6, rotating ring 7, drain pan 8, gear reduction box body 9 and bearing housing 10.Half-coupling 1 is fixedly connected on the input end of high speed shaft 3 by key 2, bearing housing 10 is fixed on gear reduction box body 9.High speed shaft 3 is through the opening in transparent cover 3, and seal ring 4 external cylindrical surfaces have multiple tracks annular groove, adopts interference fit or transition fit to be loaded on high speed shaft 3.Transparent cover 5 is by bolton in the exterior edge face of bearing housing 10, and the perforate radial fit gap in seal ring 4 and transparent cover 5 is less, forms labyrinth seal structure radially.Stationary ring 6 is plate-like, is loaded between the lower edge and outer race of transparent cover 5.Rotating ring 7 is also plate-like, is tightened on high speed shaft 3 and is pressed against bearing inner ring end face by being threaded.The axial adjacent face of stationary ring 6 and rotating ring 7 forms less gap, forms axial labyrinth seal structure.Between labyrinth seal structure radially and axial labyrinth seal structure, have a cavity, on the lower edge of transparent cover 5 and the inwall of bearing housing, have axial drain pan 8, this drain pan 9 is communicated to cavity in gear reduction box body 9.
During assembling, as shown in Figure 3, first bearing is arranged between bearing housing 10 and high speed shaft 3, then stationary ring 6 is pressed in bearing housing 10, makes its root edge against the outer shroud of bearing, recycling screw thread by rotating ring 7 spinnings on high speed shaft 3, seal ring 4 is also installed on high speed shaft, transparent cover 5 is finally installed, and the fluting aliging on transparent cover 5 and bearing support 10, the drain pan 8 connecting formed.After above-mentioned sealing configuration assembling, utilize key 2 that half-coupling 1 is arranged on to high speed shaft 3 input ends.
During use, as shown in Figure 4, said gear speed reducer high speed shaft noncontact seal device is installed between the high speed shaft 3 and casing 9 of twin-screw impregnator gear reduction unit, prime mover adopts motor, and motor output shaft adopts crown gear coupling to be connected with high speed shaft.During equipment operation, seal ring rotates with the axis, and form labyrinth seal structure A radially with static transparent cover, the rotating ring of stationary ring and rotation forms axial labyrinth seal structure B, corresponding bearing housing and transparent cover bottom have drain pan, and two-in-series sealing configuration A, B and drain pan complete seal oil jointly.
Sealing principle: first, utilize the less labyrinth gap of the axial adjacent face formation of rotating ring of stationary ring and rotation to realize sealing; When the lubricant oil leaking by above-mentioned sealing configuration leaks again, because seal ring and transparent cover have radially formed less gap, need the passage forming by the throttle clearance on many seal ring external cylindrical surfaces and expansion cavity, through throttling repeatedly, can produce very large energy loss, fluid head greatly declines, and makes fluid be difficult to leak; Lubricant oil between two-in-series sealing configuration is back in machine by the drain pan on gear reduction box body, and two-in-series sealing configuration and drain pan are realized sealing effect jointly.
Below by reference to the accompanying drawings mode of execution of the present utility model is described in detail, but the utility model is not limited to described mode of execution.For those of ordinary skill in the art, in the scope of principle of the present utility model and technological thought, these mode of executions are carried out to mode of execution and carry out multiple variation, modification, replacement and modification and still fall in protection domain of the present utility model.
Claims (5)
1. a gear reduction unit high speed shaft noncontact seal device, comprise high speed shaft, bearing, bearing housing and transparent cover, described bearing housing is fixed on gear reduction box body, described bearing is installed in bearing housing, described transparent cover is fixed on the outer end of bearing housing, it is characterized in that: described transparent cover has the lower edge that stretches into bearing housing, between described lower edge and bearing, is pressed with stationary ring, the rotating ring that is connected on described high speed shaft, described stationary ring and rotating ring form axial labyrinth; Seal ring is connected on described high speed shaft, on the periphery wall of described seal ring, there is annular groove, the opening of described seal ring and transparent cover forms radial labyrinth, between described radial labyrinth and axial labyrinth, there is cavity, on the inwall of described lower edge and bearing housing, have axial drain pan, described drain pan is communicated with cavity and box house.
2. gear reduction unit high speed shaft noncontact seal device according to claim 1, it is characterized in that: described rotating ring comprises upper ring body and lower ring body, the external diameter of described upper ring body is greater than the external diameter of described seal ring, between the outer edge of described upper ring body and described lower edge, there is the first gap, between the lower surface of described upper ring body and the upper surface of described stationary ring, there is the second gap, between the outer surface of described lower ring body and the endoporus of stationary ring, have third space, described axial labyrinth is comprised of the first gap, the second gap and third space.
3. gear reduction unit high speed shaft noncontact seal device according to claim 1, is characterized in that: described rotating ring has internal thread on described high speed shaft, having the outside thread mating with internal thread.
4. gear reduction unit high speed shaft noncontact seal device according to claim 1, is characterized in that: described seal ring and high speed shaft are interference fit or transition fit.
5. gear reduction unit high speed shaft noncontact seal device according to claim 1, is characterized in that: described annular groove is parallel equally spaced 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420389234.5U CN204004331U (en) | 2014-07-14 | 2014-07-14 | Gear reduction unit high speed shaft noncontact seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420389234.5U CN204004331U (en) | 2014-07-14 | 2014-07-14 | Gear reduction unit high speed shaft noncontact seal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204004331U true CN204004331U (en) | 2014-12-10 |
Family
ID=52044334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420389234.5U Expired - Fee Related CN204004331U (en) | 2014-07-14 | 2014-07-14 | Gear reduction unit high speed shaft noncontact seal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204004331U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061317A (en) * | 2014-07-14 | 2014-09-24 | 江苏金沃机械有限公司 | Non-contact seal device for high-speed shaft of gear speed reducer |
-
2014
- 2014-07-14 CN CN201420389234.5U patent/CN204004331U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061317A (en) * | 2014-07-14 | 2014-09-24 | 江苏金沃机械有限公司 | Non-contact seal device for high-speed shaft of gear speed reducer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20170714 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |