CN220850687U - Non-contact sealing mechanism for precision speed reducer - Google Patents
Non-contact sealing mechanism for precision speed reducer Download PDFInfo
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- CN220850687U CN220850687U CN202322886786.9U CN202322886786U CN220850687U CN 220850687 U CN220850687 U CN 220850687U CN 202322886786 U CN202322886786 U CN 202322886786U CN 220850687 U CN220850687 U CN 220850687U
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- 238000007789 sealing Methods 0.000 title claims abstract description 139
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 37
- 230000007246 mechanism Effects 0.000 title claims abstract description 28
- 230000003068 static effect Effects 0.000 claims abstract description 76
- 238000009434 installation Methods 0.000 claims abstract description 12
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 230000009467 reduction Effects 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 2
- 239000010687 lubricating oil Substances 0.000 abstract description 34
- 239000003921 oil Substances 0.000 abstract description 13
- 239000007788 liquid Substances 0.000 abstract description 2
- 230000001603 reducing effect Effects 0.000 abstract description 2
- 230000002452 interceptive effect Effects 0.000 abstract 1
- 239000004519 grease Substances 0.000 description 11
- 230000001050 lubricating effect Effects 0.000 description 10
- 230000001788 irregular Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model provides a non-contact sealing mechanism for a precision speed reducer, which relates to the technical field of precision speed reducers, wherein the precision speed reducer sequentially comprises a rotating shaft, a bearing and a shell which are coaxially arranged from inside to outside at an input end, a cavity is formed between the rotating shaft and the shell, the cavity is divided into an oil storage side and an installation side by taking the bearing as a boundary, and the non-contact sealing mechanism is arranged at the installation side and comprises: a non-contact sealing cover which is arranged in the groove of the bearing surface and seals the gap between the bearing and the rotating shaft; the sealing element moving element is coaxially arranged with the rotating shaft and is linked with the rotating shaft; the non-contact sealing static assembly is coaxially arranged and linked with the shell, and a cavity is formed between the non-contact sealing static assembly and the bearing; the sealing element moving part is arranged in the non-contact sealing static component in a penetrating way, and a labyrinth groove for guiding oil liquid is formed. The utility model has the advantages that on the premise of not interfering the normal work of the rotating shaft and ensuring the tightness of lubricating oil, the friction resistance of the non-contact sealing mechanism is smaller, thereby reducing the starting torque of the precision speed reducer.
Description
Technical Field
The utility model relates to the technical field of precision speed reducers, in particular to a non-contact sealing mechanism for a precision speed reducer.
Background
A precision speed reducer is a mechanical device specifically used for converting an input of high speed and low torque into an output of low speed and high torque. It is generally composed of a plurality of gears, and the speed reducing effect is achieved by engagement and rotation between the gears. Precision retarders play an important role in many industrial fields and applications, particularly in situations where precise control and high torque output are required.
The input end of the precision speed reducer is generally driven by a servo motor, the torque of the input end is small, and many of the precision speed reducer is only a few newtons meters. In order to provide effective sealing between a rotating shaft or a part inside the speed reducer and the external environment, a rotary sealing piece is adopted for dynamic sealing, and certain friction and sealing resistance are introduced into the rotary sealing piece during operation, so that the operation resistance is increased, the speed reducer can normally operate only by overcoming larger force when the precision speed reducer is started, and the starting torque of the precision speed reducer is increased.
Accordingly, there is a need for improvement in that the present utility model provides a non-contact sealing mechanism for a precision speed reducer based on the reduction of resistance by the precision speed reducer generally lubricated with grease.
Disclosure of utility model
Aiming at the defects existing in the prior art, the utility model aims to provide a non-contact sealing mechanism for a precision speed reducer, which comprises the following specific scheme:
a non-contact sealing mechanism for accurate reduction gear, accurate reduction gear is from inside to outside including coaxial rotation axis, bearing and the casing that sets up in proper order in input department, is formed with the cavity between rotation axis, the casing, and the cavity uses the bearing to divide to establish as oil storage side, installation side as the world, and non-contact sealing mechanism locates the installation side, includes:
a non-contact sealing cover which is arranged in the groove of the bearing surface and seals the gap between the bearing and the rotating shaft;
The sealing element moving element is coaxially arranged with the rotating shaft and is linked with the rotating shaft, and a gap is formed between the sealing element moving element and the surface of the shell;
The non-contact sealing static component is coaxially arranged and linked with the shell, a gap is arranged between the non-contact sealing static component and the surface of the rotating shaft, and a cavity is formed between the non-contact sealing static component and the bearing;
The sealing element moving part is arranged in the non-contact sealing static component in a penetrating way, and a labyrinth groove for guiding oil liquid is formed.
Therefore, when the input end of the precision speed reducer is vertically installed, the oil storage side is arranged below, the installation side is arranged above, and the non-contact sealing mechanism is arranged above, so that lubricating grease and lubricating oil separated from the lubricating grease can not seep out from a gap between the non-contact sealing cover and the bearing under the action of gravity due to small gap between the non-contact sealing cover and the bearing. On the basis of ensuring the tightness, when the sealing element moving element moves along with the rotating shaft, the sealing element moving element does not generate larger interference with the non-contact sealing static assembly to generate larger friction resistance.
When the input end of the precision speed reducer is horizontally installed, if part of lubricating grease and lubricating grease are separated out, the lubricating oil seeps out from gaps between the bearing and the rotating shaft and gaps between the bearing and the non-contact sealing cover, when the lubricating oil enters the lower part of a cavity between the bearing and the non-contact sealing static component, after the lubricating oil accumulates to a certain extent along with the time, the lubricating oil can creep into a labyrinth groove between the non-contact sealing static component and the sealing element moving part due to the arrangement of the gaps, the sealing element moving part is driven to rotate along with the rotation of the rotating shaft, the lubricating oil can be brought into the whole labyrinth groove by the sealing element moving part after the rotation of the rotating shaft by 180 degrees, and flows to the upper part of the cavity along with the labyrinth Gong Cao, so that the lubricating oil is temporarily stored in the cavity, and the possibility of seeping outwards is reduced. On the basis of ensuring the tightness, when the sealing element moving part moves along with the rotating shaft, lubricating oil can also lubricate the relative movement between the sealing element moving part and the non-contact sealing static assembly, so that the friction resistance is reduced.
Further, the non-contact seal static assembly comprises a seal inner static member and a seal outer static member;
the surface of the inner static piece of the sealing piece, which is close to the shell, and the surface of the outer static piece of the sealing piece are in interference fit with the shell.
Therefore, the static piece on the inner side of the sealing piece is installed on the shell in an interference manner, and the static piece on the outer side of the sealing piece is installed on the shell in an interference manner, so that linkage with the shell is realized. The sealing element moving part is installed on the rotating shaft in an interference mode, and linkage with the rotating shaft is achieved.
Further, a first labyrinth groove is formed between the inner side static part of the sealing element and the sealing element moving part, and a second labyrinth groove is formed between the outer side static part of the sealing element and the sealing element moving part.
Therefore, after the oil in the cavity spreads into the first labyrinth groove and the second labyrinth groove under the gravity, the first labyrinth groove and the second labyrinth groove are respectively positioned at two sides of the sealing element moving part, and when the sealing element moving part rotates, the oil in the two labyrinth grooves can be driven to displace simultaneously.
Further, an inner static part boss is formed in the direction of the inner static part of the sealing element, which faces the sealing element moving part, a sealing element moving part groove is formed in the direction of the sealing element moving part, which faces the sealing element outer static part, and the inner static part boss is located in the sealing element moving part groove.
Therefore, the cooperation of the inner static piece boss and the sealing piece moving piece groove enables the first labyrinth groove between the inner static piece and the sealing piece moving piece of the sealing piece to be irregular, so that lubricating oil is gentle in the flowing process, and an effective lubricating effect is generated between the sealing piece moving piece and the inner static piece boss.
Further, a diversion inclined plane is formed on the surface of the inner static part boss.
From this, the setting of water conservancy diversion inclined plane for the position of first labyrinth groove between inside quiet piece boss, sealing member moving part recess forms a great space, when lubricating oil passes here, can play a water conservancy diversion effect to lubricating oil, avoids lubricating oil to flow.
Further, the outer diameter of the inner stationary member boss gradually decreases in a direction approaching the seal moving member groove.
Therefore, the diversion inclined plane can be formed on the outer surface of the inner static piece boss.
Further, an outer static piece boss is formed on the outer static piece of the sealing piece, and the outer static piece boss is arranged far away from the sealing piece moving piece groove.
Therefore, the cooperation of the outer static piece boss and the sealing piece moving piece groove enables the second labyrinth groove between the sealing piece outer static piece and the sealing piece moving piece to be irregular, so that lubricating oil is gentle in the flowing process, and effective lubricating action is conveniently generated between the sealing piece outer static piece and the sealing piece moving piece.
Compared with the prior art, the utility model has the following beneficial effects:
When the precision speed reducer is used horizontally or the input end is upward, the non-contact sealing mechanism can be adopted, and the non-contact sealing cover, the non-contact sealing static component and the rotating shaft in the non-contact sealing mechanism can not be in direct contact, so that on the premise of not obstructing the normal work of the rotating shaft and ensuring the tightness of lubricating oil, the friction resistance generated by the lubricating oil can be reduced when the sealing element moving element rotates along with the rotating shaft, and the starting torque of the precision speed reducer is reduced.
Drawings
FIG. 1 is a schematic diagram of the working principle of an embodiment of the present utility model;
fig. 2 is a cross-sectional view of a non-contact seal stationary assembly, seal moving member.
Reference numerals: 1. a rotation shaft; 2. a housing; 3. a bearing; 4. a non-contact seal stationary assembly; 5. a seal inboard static; 51. an inner static piece boss; 6. a seal outside static member; 61. an outer static piece boss; 7. a seal member; 71. a seal member moving member groove; 8. a non-contact sealing cover; 9. a first labyrinth groove; 10. a second labyrinth groove; 11. and a diversion inclined plane.
Detailed Description
The present utility model will be described in further detail with reference to examples and drawings, but embodiments of the present utility model are not limited thereto.
In the prior art, the input of a precision retarder is referred to as the power input portion of the retarder, through which the driving force is typically transferred to the gear system inside the retarder. The input is typically coupled to a drive source (e.g., a motor) to enable the reducer to receive an external power input and convert it to a specific output. The precise speed reducer comprises a rotating shaft 1, a bearing 3 and a shell 2 which are coaxially arranged at an input end from inside to outside in sequence, wherein the rotating shaft 1, namely an input shaft, is connected to a driving source, the bearing 3 is used for supporting the rotation of the input shaft, friction and abrasion on the input shaft are reduced, and the shell 2 plays a role in protecting and supporting the input end.
The precision speed reducer is generally lubricated by grease, a cavity is formed between the rotating shaft 1 and the shell 2, the cavity is divided into an oil storage side and an installation side by taking the bearing 3 as a boundary, and the oil storage side is used for storing the grease.
In order to realize dynamic sealing of lubricating oil between the bearing 3 and the rotating shaft 1, the utility model provides a non-contact sealing mechanism which is arranged on the installation side, and the friction resistance of the non-contact sealing mechanism is small on the premise of not obstructing the normal operation of the rotating shaft 1 and ensuring the sealing performance of the lubricating oil, so that the starting torque of a precision speed reducer is reduced.
As shown in fig. 1, the non-contact sealing mechanism comprises a non-contact sealing cover 8, a sealing member moving member 7 and a non-contact sealing static assembly 4. It should be noted that, in this embodiment, the dynamic sealing is implemented by the sealing member moving member 7 and the non-contact sealing static assembly 4 in cooperation, and when the sealing member moving member 7 moves, the non-contact sealing static assembly 4 remains static, so as to implement the sealing effect.
The non-contact sealing cover 8 is annular and coaxially arranged with the bearing 3, the cross section of the non-contact sealing cover is U-shaped, as shown in fig. 1, an annular groove is formed on the surface of the bearing 3, the groove on the right side is abutted with a gap between the bearing 3 and the rotating shaft 1, the non-contact sealing cover 8 is embedded in the groove on the surface of the bearing 3, and the gap between the bearing 3 and the rotating shaft 1 is sealed.
The whole sealing element moving part 7 is annular and is coaxially arranged with the rotating shaft 1, a folded edge is formed on one side, close to the rotating shaft 1, of the sealing element moving part 7, and the folded edge is installed on the rotating shaft 1 in an interference mode, so that the sealing element moving part 7 and the rotating shaft 1 are in linkage, and when the rotating shaft 1 is in rotary motion, the sealing element moving part 7 can also be in rotary motion. In addition, a gap is formed between the seal moving member 7 and the surface of the housing 2, and the seal moving member 7 does not interfere with the housing 2 when performing rotational movement.
The non-contact seal static assembly 4 is annular in shape as a whole, is coaxially arranged with the shell 2 and is linked, namely the shell 2 and the non-contact seal static assembly 4 are kept static together. In this embodiment, the non-contact means that the non-contact seal stationary assembly 4 does not contact the rotating shaft 1, and a gap is provided between the non-contact seal stationary assembly 4 and the surface of the rotating shaft 1, so that the non-contact seal stationary assembly 4 does not interfere with the rotating shaft 1 during the rotation.
When the non-contact sealing static assembly 4 is installed on the shell 2, a certain distance exists between the non-contact sealing static assembly 4 and the bearing 3 and the non-contact sealing cover 8 on the bearing 3, so that a cavity is formed between the non-contact sealing static assembly 4 and the bearing 3. The sealing element moving part 7 is arranged in the non-contact sealing static assembly 4 in a penetrating way, and a labyrinth groove for guiding oil is formed.
Therefore, when the input end of the precision speed reducer is vertically installed, the oil storage side is arranged below, the installation side is arranged above, and the non-contact sealing mechanism is arranged above, so that lubricating grease and lubricating grease precipitated lubricating oil can not seep out from the gap between the non-contact sealing cover 8 and the bearing 3 under the action of gravity due to small gap between the non-contact sealing cover 8 and the bearing 3.
It should be noted that, when the input end of the precision reducer is vertically installed, the non-contact sealing cover 8 can be installed, and the sealing element moving element 7 and the non-contact sealing static assembly 4 can be installed without installation, so that certain flexibility is provided.
When the input end of the precision speed reducer is horizontally installed, the non-contact sealing cover 8, the sealing piece moving piece 7 and the non-contact sealing static assembly 4 are all required to be installed. If part of lubricating grease and lubricating oil separated out by the lubricating grease can seep out from gaps between the bearing 3 and the rotating shaft 1 and gaps between the bearing 3 and the non-contact sealing cover 8, when the lubricating oil enters the lower part of a cavity between the bearing 3 and the non-contact sealing static assembly 4, after the lubricating oil is accumulated to a certain degree along with the time, the lubricating oil can creep into a labyrinth groove between the non-contact sealing static assembly 4 and the sealing element moving part 7 due to the arrangement of the gaps, the sealing element moving part 7 is driven to rotate along with the rotation of the rotating shaft 1, the lubricating oil can be brought into the whole labyrinth groove by the sealing element moving part 7 after the rotation of the rotating shaft 1 by 180 degrees and flows to the upper part of the cavity along the labyrinth Gong Cao, so that the lubricating oil is temporarily stored in the cavity, and the possibility of seeping outwards is reduced.
In order to achieve the formation of the labyrinth grooves, referring to fig. 1 and 2, the non-contact seal static assembly 4 includes a seal inner static member 5 and a seal outer static member 6, and the surfaces of the seal inner static member 5 and the seal outer static member 6, which are close to the housing 2, are in interference fit with the housing 2, so that the two are installed on the housing 2 in an interference manner, and linkage with the housing 2 is achieved.
Wherein, a first labyrinth groove 9 is formed between the seal inner side static member 5 and the seal moving member 7, an inner side static member boss 51 is formed in the direction of the seal inner side static member 5 toward the seal moving member 7 in order to adjust the shape of the first labyrinth groove 9, a seal moving member groove 71 is formed in the direction of the seal moving member 7 toward the seal outer side static member 6, and the inner side static member boss 51 is in the seal moving member groove 71, whereby the shape of the first labyrinth groove 9 is irregular.
Next, a second labyrinth groove 10 is formed between the seal outside stator 6 and the seal mover 7, and in order to adjust the shape of the second labyrinth groove 10, an outside stator boss 61 is formed on the seal outside stator 6, and the outside stator boss 61 is disposed away from the seal mover groove 71, whereby the shape of the second labyrinth groove 10 is irregular.
Therefore, after the oil in the cavity spreads into the first labyrinth groove 9 and the second labyrinth groove 10 under the action of gravity and the self-fluidity, the shapes of the first labyrinth groove 9 and the second labyrinth groove 10 are irregular, so that the lubricating oil is gentle in the flowing process, and the first labyrinth groove 9 and the second labyrinth groove 10 are respectively positioned on two sides of the sealing element moving part 7, so that the oil in the two labyrinth grooves can be simultaneously driven to displace when the sealing element moving part 7 rotates. During the displacement, effective lubrication is facilitated between the seal moving part 7 and the inner static part boss 51.
Preferably, the outer diameter of the inner stator boss 51 is gradually reduced in a direction approaching the seal mover groove 71, so that the surface of the inner stator boss 51 is formed with the guide slope 11, and it can be seen from the upper side in fig. 1 that the guide slope 11 is in the lateral flow path of the lubricating oil. Therefore, the diversion inclined plane 11 is arranged, so that a larger space is formed at the position between the inner static piece boss 51 and the sealing piece moving piece groove 71 by the first labyrinth groove 9, when lubricating oil passes through the space, the phenomenon that the lubricating oil does not continue to flow downwards due to the fact that the upper surface of the inner static piece boss 51 is too horizontal is avoided, and the diversion inclined plane 11 can play a diversion role on the lubricating oil, so that the phenomenon that the lubricating oil flows is avoided.
Similarly, an inclined surface may be disposed on the inner surface of the outer stationary member boss 61 facing the seal moving member 7, so as to provide a larger space for the passing lubricant and facilitate the lubricant flow.
In summary, when the non-contact sealing mechanism is used, two use modes can be presented according to two different installation scenes of the precision speed reducer, and on the premise of not obstructing the normal work of the rotating shaft 1 and ensuring the tightness of lubricating oil, the lubricating oil generates a lubrication effect when the rotating shaft 1 rotates, and the non-contact sealing mechanism plays a sealing effect after the lubricating oil, meanwhile, the friction resistance of the non-contact sealing mechanism is smaller, so that the starting torque of the precision speed reducer is reduced.
The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.
Claims (7)
1. A non-contact sealing mechanism for accurate reduction gear, accurate reduction gear is from inside to outside including rotation axis (1), bearing (3) and casing (2) of coaxial setting in proper order in input department, is formed with the cavity between rotation axis (1), the casing (2), and the cavity is divided into oil storage side, installation side with bearing (3) as the boundary, its characterized in that, and non-contact sealing mechanism locates the installation side, includes:
A non-contact sealing cover (8) which is arranged in a groove on the surface of the bearing (3) and seals a gap between the bearing (3) and the rotating shaft (1);
the sealing element moving part (7) is coaxially arranged with the rotating shaft (1) and is linked with the rotating shaft, and a gap is formed between the sealing element moving part and the surface of the shell (2);
the non-contact sealing static assembly (4) is coaxially arranged and linked with the shell (2), a gap is arranged between the non-contact sealing static assembly and the surface of the rotating shaft (1), and a cavity is formed between the non-contact sealing static assembly and the bearing (3);
The sealing element moving part (7) is arranged in the non-contact sealing static component (4) in a penetrating way, and a labyrinth groove for guiding oil is formed.
2. The non-contact seal mechanism for a precision speed reducer according to claim 1, wherein the non-contact seal stationary assembly (4) comprises a seal inner stationary member (5), a seal outer stationary member (6);
The surfaces of the inner static part (5) and the outer static part (6) of the sealing element, which are close to the shell (2), are in interference fit with the shell (2).
3. The non-contact seal mechanism for a precision speed reducer according to claim 2, wherein a first labyrinth groove (9) is formed between the seal inner static member (5) and the seal moving member (7), and a second labyrinth groove (10) is formed between the seal outer static member (6) and the seal moving member (7).
4. A non-contact seal mechanism for a precision speed reducer according to claim 3, characterized in that the seal inner stationary member (5) is formed with an inner stationary member boss (51) in a direction toward the seal moving member (7), the seal moving member (7) is formed with a seal moving member groove (71) in a direction toward the seal outer stationary member (6), and the inner stationary member boss (51) is located in the seal moving member groove (71).
5. The non-contact seal mechanism for a precision speed reducer according to claim 4, wherein a diversion slope (11) is formed on a surface of the inner stationary member boss (51).
6. The non-contact seal mechanism for a precision speed reducer according to claim 5, wherein the outer diameter of the inner stationary member boss (51) gradually decreases in a direction approaching the seal moving member groove (71).
7. The non-contact seal mechanism for a precision speed reducer according to claim 4, wherein an outer stationary member boss (61) is formed on the seal outer stationary member (6), and the outer stationary member boss (61) is disposed away from the seal moving member groove (71).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322886786.9U CN220850687U (en) | 2023-10-26 | 2023-10-26 | Non-contact sealing mechanism for precision speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322886786.9U CN220850687U (en) | 2023-10-26 | 2023-10-26 | Non-contact sealing mechanism for precision speed reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220850687U true CN220850687U (en) | 2024-04-26 |
Family
ID=90746021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322886786.9U Active CN220850687U (en) | 2023-10-26 | 2023-10-26 | Non-contact sealing mechanism for precision speed reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220850687U (en) |
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2023
- 2023-10-26 CN CN202322886786.9U patent/CN220850687U/en active Active
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