CN215214658U - Speed reducer input shaft non-contact seal end cover - Google Patents
Speed reducer input shaft non-contact seal end cover Download PDFInfo
- Publication number
- CN215214658U CN215214658U CN202120817923.1U CN202120817923U CN215214658U CN 215214658 U CN215214658 U CN 215214658U CN 202120817923 U CN202120817923 U CN 202120817923U CN 215214658 U CN215214658 U CN 215214658U
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- end cover
- sealing
- speed reducer
- ring
- input shaft
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 44
- 238000007789 sealing Methods 0.000 claims abstract description 89
- 239000004519 grease Substances 0.000 claims abstract description 23
- 230000001050 lubricating effect Effects 0.000 claims abstract description 17
- 230000003068 static effect Effects 0.000 claims abstract description 16
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000005299 abrasion Methods 0.000 abstract description 4
- 239000010687 lubricating oil Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 239000003921 oil Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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- General Details Of Gearings (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Sealing Devices (AREA)
Abstract
The utility model relates to the technical field of shaft seal, in particular to a non-contact type sealing end cover of an input shaft of a speed reducer, which comprises a movable end cover and a static end cover, wherein the movable end cover is arranged on a shaft of the speed reducer, the static end cover is fixed on a box body of the speed reducer, at least two sealing grooves are arranged on the outer end surface of the static end cover along the radial direction at intervals, the sealing grooves are annular, at least two sealing rings are arranged on the inner end surface of the movable end cover along the radial direction at intervals, the sealing rings are inserted in the corresponding sealing grooves, each sealing groove corresponds to one sealing ring, lubricating grease is filled between the sealing ring and the sealing groove, the non-contact type sealing end cover of the input shaft of the speed reducer can adapt to the positive and negative rotation of the shaft in a clearance fit sealing mode of a labyrinth structure between the sealing grooves and the sealing rings and is non-contact type, the abrasion loss is small, and the service life is longer; grease sealing is realized by filling lubricating grease between the sealing groove and the sealing ring.
Description
Technical Field
The utility model belongs to the technical field of the axle seal technique and specifically relates to a speed reducer input shaft non-contact end cover.
Background
The speed reducer has wide application in industrial enterprises. Lubricating oil is generally used for lubricating and cooling in the speed reducer box body, the lubricating oil has a built-in type and an external circulation type according to the size and the structure of the speed reducer, and oil in two modes is basically kept in a non-pressure state and a low-pressure-difference state inside and outside the speed reducer. Because the pressure difference between the inside and the outside of the reduction box body is small, the reduction box generally adopts a simple skeleton sealing method, a labyrinth sealing method and a combined sealing method for sealing the outer shaft. The skeleton seal and other contact seals have certain loss, and a larger sealing gap is easily generated after a long time, so that the phenomena of oil leakage and oil leakage of the speed reducer occur; labyrinth seals are typically one of the seals in combination, with fewer of them being used individually. When the labyrinth seal is used in a combined mode, if the other sealing mode fails, the speed reducer still has the phenomenon of oil leakage.
The reduction gear input shaft generally has a high rotation speed, and therefore a spiral sealing method can be considered. The spiral seal is characterized by complex processing and requirement on the rotation direction. When the rotation direction is changed, the sealing effect is rather deteriorated. It is therefore necessary to consider designing a sealing structure that is a spiral seal concept regardless of the direction of rotation, instead of a spiral seal, and in combination with a labyrinth seal.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: in order to overcome the problems of insufficient sealing degree between a speed reducer shaft and a box body and insufficient use time efficiency in the prior art, the non-contact type sealing end cover for the input shaft of the speed reducer is provided.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a speed reducer input shaft non-contact seal end cover, includes movable end cover and quiet end cover, movable end cover installs on the axle of speed reducer, quiet end cover is fixed on the box of speed reducer, be provided with two at least seal grooves along radial interval on the outer end terminal surface of quiet end cover, the seal groove is the annular, be provided with two at least sealing rings along radial interval on the inner end terminal surface of movable end cover, the sealing ring inserts and establishes in its seal groove that corresponds, and each seal groove corresponds a sealing ring, it is filled with lubricating grease to fill between seal ring and the seal groove, the utility model provides a speed reducer input shaft non-contact seal end cover, through the clearance fit sealing mode of labyrinth structure between seal groove and the sealing ring can adapt to the positive derotation of axle, and be non-contact, the little life that wears and loses is longer; grease is filled between the sealing groove and the sealing ring.
In order to solve the problem of lubricating oil leakage in the box body, the lubricating oil leakage prevention device further comprises a center ring which extends into the box body of the speed reducer and is arranged on the inner end face of the movable end cover, the center ring penetrates through a center hole of the static end cover, the center ring and the sealing rings are coaxially arranged, the sealing rings are arranged on the outer sides of the center ring, the inner end face of the center ring axially protrudes out of the inner end face of the static end cover, a plurality of first grooves which are arranged at intervals are arranged on the outer peripheral face of the center ring, notches of the first grooves are arranged on the inner end face of the center ring, the first grooves form cavities in the gaps, and negative pressure is generated inside the cavities under the high-speed rotating state, so that lubricating oil in the gap layer can be thrown out of the speed reducer box body, the lubricating oil is prevented from advancing to a sealing groove on the outer ring, and the lubricating oil is prevented from leaking out of the speed reducer box body.
In order to solve the problem that the lubricating grease cannot stay in the sealing groove at the outermost side, the sealing structure further comprises a plurality of second grooves which are arranged at intervals on the outer peripheral surface of the sealing ring at the outermost side, notches of the second grooves are located on the end surface of the inner end of the sealing ring, acting force generated by the second grooves is not enough to enable the high-viscosity lubricating grease to continue to advance towards the inner sealing ring, and the lubricating grease only stays in the sealing groove at the outermost side to form grease sealing, so that external dust is prevented from entering the interior of the reduction gearbox.
In order to solve the problem that the movable end cover and the input shaft are fixed, the fixing device further comprises a locking boss arranged on the end face of the outer end of the movable end cover, a locking screw hole is arranged on the locking boss, and a bolt connected with a shaft thread is arranged in the locking screw hole to fix the movable end cover.
In order to solve the problem that the loss of the lubricating grease cannot be supplemented, the static end cover is provided with an injection hole, the injection hole is communicated with the sealing groove located on the outermost side, and the lubricating grease can be supplemented through the injection hole.
In order to solve the problem that the static end cover and the speed reducer box body are fixed, the speed reducer box body fixing device further comprises a plurality of bolt holes which are distributed circumferentially and are arranged on the outer ring of the static end cover, and bolts which are connected with the speed reducer box body in a threaded mode are arranged in the bolt holes to fix the static end cover.
The utility model has the advantages that: the utility model provides a non-contact type sealing end cover of an input shaft of a speed reducer, which can adapt to the positive and negative rotation of the shaft by a clearance fit sealing mode of a labyrinth structure between a sealing groove and a sealing ring, is non-contact, has small abrasion loss and longer service life; through filling lubricating grease between seal groove and the sealing ring, form the fat seal at the in-process that moves end cover and quiet end cover relative rotation, strengthened sealing performance, pin lubricating grease through first recess slot type structural arrangement, pin lubricating oil through second recess slot type structural arrangement, strengthened sealing performance.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a schematic perspective view of the assembled state of the movable end cap and the stationary end cap of the present invention;
FIG. 2 is a schematic view of the structure of the present invention showing the movable end cap and the stationary end cap separated from each other in a left-side view;
FIG. 3 is a schematic view of the structure of the present invention showing the movable end cap and the stationary end cap separated from each other in a right-looking perspective;
FIG. 4 is a schematic view of the front view structure of the present invention in a state where the movable end cap and the stationary end cap are separated;
FIG. 5 is a schematic view of the front view of the assembled state of the movable end cap and the stationary end cap of the present invention;
FIG. 6 is a schematic cross-sectional view at A-A of the present invention;
fig. 7 is an enlarged schematic structural diagram of the present invention at B.
In the figure: 1. the sealing device comprises a movable end cover, 11, a sealing ring, 111, a second groove, 12, a center ring, 121, a first groove, 13, a locking boss, 131, a locking screw hole, 2, a static end cover, 21, a sealing groove, 22, an injection hole, 23, a bolt hole, 3 and an input shaft.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
As shown in fig. 1, fig. 2, fig. 3, fig. 6 and fig. 7, a non-contact type end cover for an input shaft of a speed reducer comprises a movable end cover 1 and a stationary end cover 2, wherein the movable end cover 1 is installed on the input shaft 3 of the speed reducer, the stationary end cover 2 is fixed on a box body of the speed reducer, at least two seal grooves 21 are arranged on an outer end face of the stationary end cover 2 along a radial direction at intervals, the seal grooves 21 are annular, at least two seal rings 11 are arranged on an inner end face of the movable end cover 1 along a radial direction at intervals, the seal rings 11 are inserted into the corresponding seal grooves 21, each seal groove 21 corresponds to one seal ring 11, and lubricating grease is filled between each seal ring 11 and the seal groove 21. The device is in a non-contact type, has small abrasion loss and longer service life; grease is filled between the seal groove 21 and the seal ring 11.
As shown in fig. 2 and 4, a center ring 12 extending into the box body of the speed reducer is arranged on the inner end surface of the movable end cover 1, the center ring 12 penetrates through the center hole of the static end cover 2, the center ring 12 and the sealing ring 11 are coaxially arranged, the sealing rings 11 are all positioned outside the central ring 12, the inner end surface of the central ring 12 axially protrudes out of the inner end surface of the static end cover 2, a plurality of first grooves 121 which are arranged at intervals are arranged on the outer peripheral surface of the central ring 12, the notches of the first grooves 121 are located on the inner end surface of the center ring 12, the first grooves 121 form a hollow in the gap, the cavities generate negative pressure inside under the high-speed rotation state, so that lubricating oil in the gap layer can be thrown out into the speed reducer box body, the lubricating oil is prevented from advancing to the sealing groove 21 of the outer ring, the lubricating oil is prevented from leaking out of the speed reducer box body, and the lubricating oil is stored in the box body.
As shown in fig. 2 and 7, a plurality of second grooves 111 are arranged at intervals on the outer peripheral surface of the outermost sealing ring 11, the notches of the second grooves 111 are located on the inner end surface of the sealing ring 11, and the acting force generated by the second grooves 111 is not enough to enable high-viscosity lubricating grease to continue to advance towards the inner sealing ring and only stay in the outermost sealing groove 21 to form grease sealing, so that external dust is prevented from entering the interior of the reduction gearbox.
As shown in fig. 3 and 5, a locking boss 13 is provided on the outer end face of the movable end cover 1, a locking screw hole 131 is provided on the locking boss 13, and a bolt connected with a shaft thread is installed in the locking screw hole 121 to fix the movable end cover.
As shown in fig. 4, the stationary end cover 2 is provided with an injection hole 22, and the injection hole 22 communicates with the outermost seal groove 21, so that grease can be replenished through the injection hole 22.
As shown in fig. 3, a plurality of bolt holes 23 distributed circumferentially are formed in the outer ring of the stationary end cover 2, and bolts connected with the reducer case through threads are arranged in the bolt holes 23 to fix the stationary end cover.
Example (b): as shown in fig. 1-7, two sealing rings 11 are disposed on the movable end cover 1, two sealing grooves 21 are correspondingly disposed on the stationary end cover 2, the sealing grooves 21 have equal widths and equal heights, the length of the second groove 111 is one half to two thirds of the thickness of the sealing ring 11, the depth of the cavity formed by the first groove 121 is one half to two thirds of the depth of the center ring 12, when the movable end cover 1 is installed, the movable end cover 1 is sleeved with the input shaft 3, bolts are screwed into two symmetrical locking screw holes 131 on the locking boss 11 of the movable end cover 1 for fastening, eight uniformly distributed bolt holes 23 on the stationary end cover 2 are positioned through the bolt holes 23 to connect the stationary end cover 2 to the reducer casing, and during assembly, the filling hole 22 of the lubricating grease faces upward.
The utility model provides a non-contact type sealing end cover of an input shaft of a speed reducer, which can adapt to the positive and negative rotation of the shaft by a clearance fit sealing mode of a labyrinth structure between a sealing groove 21 and a sealing ring 11, is non-contact, has small abrasion loss and longer service life; through filling lubricating grease between seal groove 21 and sealing ring 11, form the grease seal at the relative pivoted in-process of moving end cap 1 and quiet end cap 2, strengthened sealing performance, arrange through first recess 121 slot type structure and lock lubricating grease, arrange through second recess 111 slot type structure and lock lubricating oil, strengthened sealing performance.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. The utility model provides a speed reducer input shaft non-contact end cover, characterized by, is including moving end cover (1) and quiet end cover (2), it installs on input shaft (3) of speed reducer to move end cover (1), quiet end cover (2) are fixed on the box of speed reducer, be provided with two at least seal grooves (21) along radial interval on the outer end terminal surface of quiet end cover (2), seal groove (21) are the annular, move and be provided with two at least sealing rings (11) along radial interval on the inner terminal surface of end cover (1), sealing ring (11) are inserted and are established in its seal groove (21) that corresponds, and each seal groove (21) correspond a sealing ring (11), it has lubricating grease to fill between sealing ring (11) and seal groove (21).
2. The speed reducer input shaft non-contact type sealing end cover according to claim 1, characterized in that: the inner end face of the movable end cover (1) is provided with a center ring (12) extending into a box body of the speed reducer, the center ring (12) penetrates through a center hole of the static end cover (2), the center ring (12) and the sealing ring (11) are coaxially arranged, the sealing ring (11) is located on the outer side of the center ring (12), the inner end face of the center ring (12) axially protrudes out of the inner end face of the static end cover (2), the outer peripheral face of the center ring (12) is provided with a plurality of first grooves (121) arranged at intervals, and notches of the first grooves (121) are located on the inner end face of the center ring (12).
3. The speed reducer input shaft non-contact type sealing end cover according to claim 1, characterized in that: the outer peripheral surface of the sealing ring (11) located on the outermost side is provided with a plurality of second grooves (111) which are arranged at intervals, and notches of the second grooves (111) are located on the inner end face of the sealing ring (11).
4. The speed reducer input shaft non-contact type sealing end cover according to claim 1, characterized in that: the end face of the outer end of the movable end cover (1) is provided with a locking boss (13), and the locking boss (13) is provided with a locking screw hole (131).
5. The speed reducer input shaft non-contact type sealing end cover according to claim 1, characterized in that: and the static end cover (2) is provided with an injection hole (22), and the injection hole (22) is communicated with the sealing groove (21) positioned on the outermost side.
6. The speed reducer input shaft non-contact type sealing end cover according to claim 1, characterized in that: and a plurality of bolt holes (23) which are circumferentially distributed are formed in the outer ring of the static end cover (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120817923.1U CN215214658U (en) | 2021-04-20 | 2021-04-20 | Speed reducer input shaft non-contact seal end cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120817923.1U CN215214658U (en) | 2021-04-20 | 2021-04-20 | Speed reducer input shaft non-contact seal end cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215214658U true CN215214658U (en) | 2021-12-17 |
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ID=79449754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120817923.1U Active CN215214658U (en) | 2021-04-20 | 2021-04-20 | Speed reducer input shaft non-contact seal end cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215214658U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458751A (en) * | 2022-01-27 | 2022-05-10 | 大连华锐重工集团股份有限公司 | Cooling system for shield machine main drive speed reducer |
-
2021
- 2021-04-20 CN CN202120817923.1U patent/CN215214658U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458751A (en) * | 2022-01-27 | 2022-05-10 | 大连华锐重工集团股份有限公司 | Cooling system for shield machine main drive speed reducer |
| CN114458751B (en) * | 2022-01-27 | 2023-08-18 | 大连华锐重工集团股份有限公司 | Cooling system for main driving speed reducer of shield tunneling machine |
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