CN204153150U - A kind of floating sealing device of rotating shaft - Google Patents
A kind of floating sealing device of rotating shaft Download PDFInfo
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- CN204153150U CN204153150U CN201420474461.8U CN201420474461U CN204153150U CN 204153150 U CN204153150 U CN 204153150U CN 201420474461 U CN201420474461 U CN 201420474461U CN 204153150 U CN204153150 U CN 204153150U
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- sealing
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- running shaft
- hole
- floating bushing
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Abstract
The utility model discloses a kind of floating sealing device of rotating shaft; It comprises running shaft and sealing gland, sealing gland is provided with the axis hole coordinated with running shaft, sealing gland is provided with mounting hole, the floating bushing coordinated with running shaft is provided with in mounting hole, floating bushing radially can move in mounting hole, the inner peripheral surface of floating bushing is provided with mounting groove, is provided with Sealing in mounting groove, Sealing and mounting groove interference fit; Sealing and mounting groove interference fit, make floating bushing and Sealing geo-stationary, floating bushing radially can move in mounting hole, make when running shaft produces circular runout because of concentricity tolerance, floating bushing can swing with Sealing together with running shaft, to realize floating seal, avoid the wearing and tearing of Sealing, extend the working life of Sealing, the utility model can realize floating seal, effectively reduce the impact because the concentricity tolerance between axis hole and running shaft produces sealing, improve sealability, extend the working life of Sealing.
Description
Technical field
The utility model relates to rotation axis seal technical field, particularly relates to a kind of floating sealing device of rotating shaft.
Background technique
Rotating sealing device appears in very many machinery.Due to the existence of machining tolerances and build-up tolerance, make to there is concentricity tolerance between running shaft and the axis hole of sealing gland, namely there is gap between running shaft and the axis hole of sealing gland, when gap is too small, the grinding of metal and metal can be there is, destroy sealing surface and the Sealing of running shaft, when excesssive gap, Sealing can get into the gap between running shaft and the axis hole of sealing gland, due to the existence of concentricity tolerance, gap length is alternately reciprocal, just as a scissors, Sealing bit by bit " is cut ", until lose sealability.
In prior art, for improving sealability, rotating seal upgrades to V-type or the lip-type packing of W type by O RunddichtringO.Although Sealing " is not cut ", concentricity tolerance still exists, the circular runout in gap, have impact on the stationarity of rotation, when rotational speed or sealed diameter increase, linear velocity increases immediately, Sealing is under fluctuation working state, and sealing lip can wear away very soon.When comprising the particle such as the grains of sand, mud in sealing medium, the wearing and tearing of sealing lip can be accelerated further.When after sealing lip wearing and tearing, sealability also can lose efficacy very soon.For offsetting the frictional loss of sealing lip, extend the working life of Sealing further.Designer replaces lip-type seal part with spring energy-storage Sealing, and the support force of spring can compensate the loss of a part of sealing lip, thus the object that realization increases the service life.In addition designer by adding lubricant oil, can also reduce the measures such as rotary seal surface roughness, reducing frictional loss.
The defect of prior art to break away from the restriction that concentricity tolerance causes working life of rotating seal, rotational speed, sealing load, become a technical bottleneck, especially for some main equipments, along with the change of ambient temperature, all can produce some unavoidable concentricity tolerances.Therefore, be necessary to develop a kind of impact that can reduce because the concentricity tolerance between axis hole and running shaft produces sealing, thus improve sealability, extend the working life of Sealing, to overcome the defect of prior art.
Model utility content
The purpose of this utility model is to provide a kind of floating sealing device of rotating shaft, the setting of its floating bushing can realize floating seal, effectively reduce the impact because the concentricity tolerance between axis hole and running shaft produces sealing, improve sealability, extend the working life of Sealing.
For reaching this object, the utility model by the following technical solutions:
A kind of floating sealing device of rotating shaft, comprise running shaft and sealing gland, sealing gland is provided with the axis hole coordinated with running shaft, sealing gland is provided with mounting hole, be provided with the floating bushing coordinated with running shaft in mounting hole, floating bushing radially can move in mounting hole, and the inner peripheral surface of floating bushing is provided with mounting groove, Sealing is provided with, Sealing and mounting groove interference fit in mounting groove.
Wherein, floating bushing is connected by locating stud with sealing gland, and sealing gland is provided with the first pin-and-hole with detent fit, locating stud and the first pin-and-hole interference fit, and floating bushing is provided with the second pin-and-hole with detent fit, locating stud and the second pin-and-hole Spielpassung.
Wherein, the internal diameter of floating bushing is slightly larger than the external diameter of running shaft.
Wherein, the gap between axis hole and running shaft is greater than the gap between the internal diameter of floating bushing and running shaft.
Wherein, the gap between axis hole and running shaft is greater than the gap between locating stud and the second pin-and-hole.
Wherein, the gap between mounting hole and the external diameter of floating bushing is greater than the gap between locating stud and the second pin-and-hole.
Wherein, the bottom of mounting hole is provided with annular groove, is provided with O RunddichtringO in annular groove.
Wherein, the below of sealing gland is provided with annular gland, and annular gland is fixedly connected with sealing gland.
The beneficial effects of the utility model: a kind of floating sealing device of rotating shaft, comprise running shaft and sealing gland, sealing gland is provided with the axis hole coordinated with running shaft, sealing gland is provided with mounting hole, be provided with the floating bushing coordinated with running shaft in mounting hole, floating bushing radially can move in mounting hole, and the inner peripheral surface of floating bushing is provided with mounting groove, Sealing is provided with, Sealing and mounting groove interference fit in mounting groove; Sealing and mounting groove interference fit, make floating bushing and Sealing geo-stationary, floating bushing radially can move in mounting hole, make when running shaft produces circular runout because of concentricity tolerance, floating bushing can swing with Sealing together with running shaft, to realize floating seal, avoid the wearing and tearing of Sealing, extend the working life of Sealing, the utility model can realize floating seal, effectively reduce the impact because the concentricity tolerance between axis hole and running shaft produces sealing, improve sealability, extend the working life of Sealing.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art.
Fig. 2 is structural representation of the present utility model.
Fig. 3 is the partial enlarged drawing at A place in Fig. 2.
Reference character is as follows:
1-running shaft; 2-sealing gland; 21-axis hole; 22-mounting hole; 23-first pin-and-hole; 3-Sealing; 4-floating bushing; 41-mounting groove; 42-second pin-and-hole; 5-annular gland; 6-locating stud; 7-O RunddichtringO
Embodiment
The technical solution of the utility model is further illustrated by specific embodiment below in conjunction with Fig. 1 to Fig. 3.
A kind of floating sealing device of rotating shaft, comprise running shaft 1 and sealing gland 2, sealing gland 2 is provided with the axis hole 21 coordinated with running shaft 1, sealing gland 2 is provided with mounting hole 22, be provided with the floating bushing 4 coordinated with running shaft 1 in mounting hole 22, floating bushing 4 radially can move in mounting hole 22, and the inner peripheral surface of floating bushing 4 is provided with mounting groove 41, Sealing 3 is provided with, Sealing 3 and mounting groove 41 interference fit in mounting groove 41.Sealing 3 and mounting groove 41 interference fit, make floating bushing 4 and Sealing 3 geo-stationary, floating bushing 4 radially can move in mounting hole 22, make when running shaft 1 produces circular runout because of concentricity tolerance, floating bushing 4 can swing with Sealing 3 together with running shaft 1, to realize floating seal, avoid the wearing and tearing of Sealing, extend the working life of Sealing, the utility model can realize floating seal, effectively reduce because the concentricity tolerance between axis hole 21 and running shaft 1 is on sealing the impact produced, improve sealability, extend the working life of Sealing.
In the present embodiment, floating bushing 4 is connected by locating stud 6 with sealing gland 2, sealing gland 2 is provided with the first pin-and-hole 23 coordinated with locating stud 6, locating stud 6 and the first pin-and-hole 23 interference fit, floating bushing 4 is provided with the second pin-and-hole 42 coordinated with locating stud 6, locating stud 6 and the second pin-and-hole 42 Spielpassung.Locating stud 6 be arranged so that floating bushing 4 can radially move by opposing seal gland 2, to realize floating seal.
In the present embodiment, the internal diameter of floating bushing 4 is slightly larger than the external diameter of running shaft 1.The internal diameter of floating bushing 4, slightly larger than the external diameter of running shaft 1, makes to have very little gap between the external diameter of the internal diameter of floating bushing 4 and running shaft 1.Due to Sealing 3 and running shaft 1 close-fitting, Sealing 3 and mounting groove 41 interference fit, i.e. geo-stationary between floating bushing 4 and Sealing 3, and there is between the external diameter of the internal diameter of floating bushing 4 and running shaft 1 very little gap, when running shaft 1 produces circular runout because of concentricity tolerance, floating bushing 4 can swing with running shaft 1 with Sealing 3, to realize floating seal, and there is between the external diameter of the internal diameter of floating bushing 4 and running shaft 1 gap, the rigidity between floating bushing 4 and running shaft 1 can be avoided to grind; Gap between the internal diameter of floating bushing 4 and the external diameter of running shaft 1 is very little, can improve sealability, and preferably, the fit tolerance between the internal diameter of floating bushing 4 and running shaft 1 can refer to the fit tolerance between sliding bearing and axle.
In the present embodiment, the gap between axis hole 21 and running shaft 1 is greater than the gap between the internal diameter of floating bushing 4 and running shaft 1.Preferably, the gap between axis hole 21 and running shaft 1 is greater than the concentricity tolerance between axis hole 21 and running shaft 1, and during to ensure the circular runout when running shaft 1 produces because of concentricity tolerance, running shaft 1 can not produce rigidity with sealing gland 2 and grind; Further preferably, the gap between axis hole 21 and running shaft 1 equals 1.25 ~ 1.5 times of the concentricity tolerance between axis hole 21 and running shaft 1.
In the present embodiment, the gap between axis hole 21 and running shaft 1 is greater than the gap between locating stud 6 and the second pin-and-hole 42, and the gap between the external diameter of mounting hole 22 and floating bushing 4 is greater than the gap between locating stud 6 and the second pin-and-hole 42.Preferably, gap between locating stud 6 and the second pin-and-hole 42 is greater than the concentricity tolerance between axis hole 21 and running shaft 1, to ensure when the circular runout that running shaft 1 produces because of concentricity tolerance, floating bushing 4 radially moves and can not produce rigidity with locating stud 6 and grind.Meanwhile, for avoiding the rigidity occurred between sealing gland 2 and running shaft 1 to grind, the gap between axis hole 21 and running shaft 1 should be greater than floating bushing 4 can the distance of radially movement, is namely greater than the gap between locating stud 6 and the second pin-and-hole 42; For avoiding the rigidity occurred between sealing gland 2 and floating bushing 4 to grind, the gap between the external diameter of mounting hole 22 and floating bushing 4 should be greater than floating bushing 4 can the distance of radially movement, is namely greater than the gap between locating stud 6 and the second pin-and-hole 42.
In the present embodiment, the bottom of mounting hole 22 is provided with annular groove, is provided with O RunddichtringO 7 in annular groove.The setting of O RunddichtringO 7 achieves the end face seal of floating bushing 4 and sealing gland 2, avoiding axial clearance between floating bushing 4 and sealing gland 2 to sealing the impact produced, improve sealability.The below of sealing gland 2 is provided with annular gland 5, and annular gland 5 is fixedly connected with sealing gland 2.Sealing gland 2 achieves the axially locating of floating bushing 4 together with annular gland 5, annular gland 5 be arranged so that the easier for installation of floating bushing 4.
Floating seal of the present utility model, the floating seal of running shaft 1 can be realized, not only efficiently reducing because the concentricity tolerance between axis hole 21 and running shaft 1 is on sealing the impact produced, improve the working life of Sealing 3, avoid the rigidity grinding between metal and metal, improve sealability, and structure is simple, accuracy of manufacturing is lower, is convenient to produce in enormous quantities, dismounting simultaneously easily, is convenient to field maintenance.Can be used in most common rotary sealing mechanism, especially too fast at linear velocity, sealing load is too high, and containing in the harsh environments of particulate matter in sealing medium, effect is particularly evident.
The technical solution of the utility model can be used for oil and natural gas drilling applications, such as down-hole equipment, wellhead blowout preventor, well mouth rotary water-tight equipment and ground test tree etc., also can be used for building field (as screw type cement pumping equipment), universal industrial mechanical field (as screw type high-pressure delivery equipment) etc.
Above content is only preferred embodiment of the present utility model, for those of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, this description should not be construed as restriction of the present utility model.
Claims (8)
1. a floating sealing device of rotating shaft, comprise running shaft (1) and sealing gland (2), described sealing gland (2) is provided with the axis hole (21) coordinated with described running shaft (1), it is characterized in that, described sealing gland (2) is provided with mounting hole (22), the floating bushing (4) coordinated with described running shaft (1) is provided with in described mounting hole (22), described floating bushing (4) radially can move in described mounting hole (22), the inner peripheral surface of described floating bushing (4) is provided with mounting groove (41), Sealing (3) is provided with in described mounting groove (41), described Sealing (3) and described mounting groove (41) interference fit.
2. a kind of floating sealing device of rotating shaft according to claim 1, it is characterized in that, described floating bushing (4) is connected by locating stud (6) with described sealing gland (2), described sealing gland (2) is provided with the first pin-and-hole (23) coordinated with described locating stud (6), described locating stud (6) and described first pin-and-hole (23) interference fit, described floating bushing (4) is provided with the second pin-and-hole (42) coordinated with described locating stud (6), described locating stud (6) and described second pin-and-hole (42) Spielpassung.
3. a kind of floating sealing device of rotating shaft according to claim 1, is characterized in that, the internal diameter of described floating bushing (4) is slightly larger than the external diameter of described running shaft (1).
4. a kind of floating sealing device of rotating shaft according to claim 1, it is characterized in that, the gap between described axis hole (21) and described running shaft (1) is greater than the gap between the internal diameter of described floating bushing (4) and described running shaft (1).
5. a kind of floating sealing device of rotating shaft according to claim 2, it is characterized in that, the gap between described axis hole (21) and described running shaft (1) is greater than the gap between described locating stud (6) and described second pin-and-hole (42).
6. a kind of floating sealing device of rotating shaft according to claim 2, it is characterized in that, the gap between the external diameter of described mounting hole (22) and described floating bushing (4) is greater than the gap between described locating stud (6) and described second pin-and-hole (42).
7. a kind of floating sealing device of rotating shaft according to claim 1, is characterized in that, the bottom of described mounting hole (22) is provided with annular groove, is provided with O RunddichtringO (7) in described annular groove.
8. a kind of floating sealing device of rotating shaft according to claim 1, it is characterized in that, the below of described sealing gland (2) is provided with annular gland (5), and described annular gland (5) is fixedly connected with described sealing gland (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420474461.8U CN204153150U (en) | 2014-08-21 | 2014-08-21 | A kind of floating sealing device of rotating shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420474461.8U CN204153150U (en) | 2014-08-21 | 2014-08-21 | A kind of floating sealing device of rotating shaft |
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| CN204153150U true CN204153150U (en) | 2015-02-11 |
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| CN201420474461.8U Active CN204153150U (en) | 2014-08-21 | 2014-08-21 | A kind of floating sealing device of rotating shaft |
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| CN (1) | CN204153150U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050248A (en) * | 2016-07-20 | 2016-10-26 | 江苏腾旋科技股份有限公司 | Soil chamber sealing device for tunnel boring machine |
| CN106948830A (en) * | 2017-05-16 | 2017-07-14 | 郎溪腾旋科技有限公司 | A kind of native storehouse sealing device of novel shield machine |
| CN109603993A (en) * | 2018-06-19 | 2019-04-12 | 微思行（北京）科技有限公司 | Self-sealing cover-like tool magazine |
| CN111571635A (en) * | 2019-02-18 | 2020-08-25 | 沈阳新松机器人自动化股份有限公司 | Forearm structure of horizontal joint robot |
-
2014
- 2014-08-21 CN CN201420474461.8U patent/CN204153150U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050248A (en) * | 2016-07-20 | 2016-10-26 | 江苏腾旋科技股份有限公司 | Soil chamber sealing device for tunnel boring machine |
| CN106948830A (en) * | 2017-05-16 | 2017-07-14 | 郎溪腾旋科技有限公司 | A kind of native storehouse sealing device of novel shield machine |
| CN109603993A (en) * | 2018-06-19 | 2019-04-12 | 微思行（北京）科技有限公司 | Self-sealing cover-like tool magazine |
| CN109603993B (en) * | 2018-06-19 | 2024-02-06 | 微思行（北京）科技有限公司 | Self-sealing cup cover type tool magazine |
| CN111571635A (en) * | 2019-02-18 | 2020-08-25 | 沈阳新松机器人自动化股份有限公司 | Forearm structure of horizontal joint robot |
| CN111571635B (en) * | 2019-02-18 | 2022-08-02 | 沈阳新松机器人自动化股份有限公司 | Forearm structure of horizontal joint robot |
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