CN101509555A - Self-pressing stern shaft filler seal - Google Patents
Self-pressing stern shaft filler seal Download PDFInfo
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- CN101509555A CN101509555A CNA2008100205472A CN200810020547A CN101509555A CN 101509555 A CN101509555 A CN 101509555A CN A2008100205472 A CNA2008100205472 A CN A2008100205472A CN 200810020547 A CN200810020547 A CN 200810020547A CN 101509555 A CN101509555 A CN 101509555A
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- gland
- self
- packing
- axle sleeve
- seal
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Abstract
The invention discloses a self-press packing seal device of a screw shaft, comprising a seal device body, a shaft sleeve and a packing gland; wherein, sealing packing is filled in a packing cavity surrounded by the shaft sleeve and the packing gland; the packing gland is loaded on the shaft sleeve via a connecting thread; a block device is arranged between the packing gland and the seal device body. The block device in the invention can adopt one-way pawl-ratchet type on-off devices and one-way roller overrunning clutches. The packing seal device of the screw shaft can automatically press the sealing packing, reliably eliminate wearing clearances of the packing in time and has the advantage of stable sealability.
Description
Technical field
The present invention relates to the screw shaft of ship seal arrangement, relate in particular to the improvement of stern shaft seal gland structure.
Background technique
Stern shaft seal is an indispensable vitals in the Ship Propeling power plant.Though stern shaft seal peculiar to vessel has multiple different structural type, the soft packing stern shaft seal is still simple in structure with it, mounting or dismounting are convenient and with low cost and be widely used.
The stern tube shaft packing seal normally by stern tube shaft cover, seal arrangement body sealing gland with and the Seal cage that surrounded in the suitable soft packing of filling constituted; Sealing gland compresses soft packing vertically, makes it produce radially elasto plastic deformation, plays seal action with the filling gap, after the slip surface filler is worn, must tighten gland bolt in time, and makes it recover sealability.
Because screw shaft of ship continuous operation often, and transferring power is powerful, and particularly along with the increase of modern ships propeller power, it is big that the stern tube shaft external diameter becomes, thereby filler wearing and tearing linear velocity increases, and wearing and tearing are accelerated, and more is prone to wearing clearance and causes leaking.In order to compensate the filler wearing clearance, traditional way is the operation conditions that will monitor stern shaft seal gland at any time, and by tightening gland bolt compensation adjustment filler space in time continually.This method not only troublesome poeration, workload is big, and is subjected to operator's artificial factor, is difficult to really guarantee the reliable and stable of seal arrangement sealability.
Summary of the invention
At the above-mentioned deficiency of existing in prior technology, technical problem to be solved by this invention provides a kind of can being in operation and compresses stuffing box packing automatically, thereby in time eliminates the self-pressing stern shaft filler seal of filler wearing clearance.
In order to solve the problems of the technologies described above, self-pressing stern shaft filler seal of the present invention, comprise seal arrangement body, axle sleeve and Gland, at described seal arrangement body, be filled with stuffing box packing in the packing cavity that axle sleeve and Gland surrounded, described Gland is loaded on the described axle sleeve by connecting thread, is provided with check device between Gland and seal arrangement body.
After adopting said structure, because Gland is loaded on the axle sleeve by connecting thread, and between Gland and seal arrangement body, also be provided with check device, thereby when rotation speed change such as screw shaft of ship startup, braking, effect at the Gland motional inertia, Gland can screw with inertia and at the axial unidirectional filler that compresses along connecting thread, make it produce radial elastic or plastic deformation, thereby the wearing clearance of soft packing is eliminated in compensation automatically, makes this packing seal remain excellent sealing performance.Also because Gland has comparatively suitable quality and boundary dimension, the rotary inertia of Gland is bigger, thereby it can provide enough impacting forces to eliminate the filler wearing clearance to filler.More owing between Gland and seal arrangement, be provided with check device, make the relative axle sleeve of Gland to compress moving axially of filler along connecting thread, and can not oppositely become flexible, guaranteed that Gland compresses timely compensating action with the gap automatically to filler.This structure also has reliable effect, effect simple in structure.
A kind of preferred embodiment of the present invention, check device in this self-pressing stern shaft filler seal comprises check pawl and non-return ratchet, and described check pawl is hinged on Gland, the non-return ratchet then is arranged on the seal arrangement body, and this check pawl is corresponding with non-return ratchet position.Adopt the pawl type check device, have reliable in action, Safety performance is good, advantages such as easy are keeped in repair in manufacturing.
The another kind of preferred embodiment of the present invention, the check device in this self-pressing stern shaft filler seal is unidirectional roller overrunning clutch, and it comprises roller, outer shroud and roller wedge surface, and this roller is arranged between outer shroud and the roller wedge surface.Adopt unidirectional roller to surmount the check device of centrifuge formula, not only pressuring action is reliable, compact structure, and can realize stepless the compressing of filler moved axially, can eliminate wearing clearance, stable performance in time, reliably.
Description of drawings
Below in conjunction with the drawings and specific embodiments self-pressing stern shaft filler seal of the present invention is described in further detail.
Fig. 1 is the structural representation of first kind of embodiment of the present invention.
Fig. 2 is the sectional view of A in the structure shown in Figure 1-A section.
Fig. 3 is the structural representation of the another kind of embodiment of the present invention.
Fig. 4 is the sectional view of B in the structure shown in Figure 3-B section.
Embodiment
In Fig. 1, self-pressing stern shaft filler seal structure shown in Figure 2, the folder axle collar 9 of split type structure is fixedly clamped on stern tube shaft 10, and rotates with stern tube shaft 10; Axle sleeve 8 closely is placed on the stern tube shaft 10 and by bolt fixedlys connected with the folder axle collar 9, and the outer cylinder of axle sleeve 8 is provided with outside thread.Gland 6 adopts disk-like structures, and its central position is provided with tapped hole, and Gland 6 is fastened to the outside thread position of axle sleeve 8 by this tapped hole, and the outside thread on the tapped hole of Gland 6 and the axle sleeve 8 constitutes connecting thread 7.Seal arrangement body 1 is placed on the stern tube shaft 10, sealing device body 1, axle sleeve 8 and Gland 6 surround a packing cavity, be filled with stuffing box packing 3 in this packing cavity, soft packing material commonly used such as natural fibre, synthetic fiber, rubber and soft metal is adopted in stuffing box packing 3.Between the inner of stuffing box packing 3 and seal arrangement body 1, be lined with filler end liner cover 2, also be provided with seal oil ring 4 separatedly at the middle section position of stuffing box packing 3.
Hinged symmetrically on the exterior edge face of Gland 6 have two check pawls 5; Corresponding with these check pawl 5 positions, on the outer cylinder of seal arrangement body 1, be provided with non-return ratchet 11, corresponding mutually check pawl 5 makes Gland 6 relative seal arrangement bodies 1 can only do unidirectional rotation with non-return ratchet 11, and oppositely turn.When stern tube shaft startup, braking or velocity variations, Gland 6 relative seal arrangement bodies 1 compress rotation, Gland 6 is pressed to stuffing box packing 3 one sidespins vertically by connecting thread 7, makes stuffing box packing 3 at the wearing clearance of axial compression with elimination stuffing box packing 3.
Above-mentioned check pawl 5 and non-return ratchet 11 another mode of executions are that check pawl 5 is hinged on seal arrangement body 1, and non-return ratchet 11 then places on the Gland 6, make check pawl 5 and non-return ratchet 11 form internal tooth Ratcheting one-way engaging and disengaging gear.
Fig. 3, shown in Figure 4 be the another kind of mode of execution of self-pressing stern shaft filler seal of the present invention, present embodiment is except that the structure of check device is different with above-mentioned two kinds of mode of executions, other structures are identical.In the present embodiment, on Gland 6, fixedly be embedded with outer shroud 13, on the outer circumferential face of axle sleeve 8, be evenly equipped with three roller wedge surfaces 15, between outer shroud 13 and roller wedge surface 15, be provided with roller 12, also pushing up on the cylinder of this roller 12 has roller spring 14, and roller spring 14 places the spring eye on the axle sleeve 8.In the present embodiment, roller wedge surface 15 can also be to be arranged to encircle in the star-wheel, and circumferential uniform five the roller wedge surfaces 15 of ring in the star-wheel encircle fixed cover and are loaded on the axle sleeve 8 in this star-wheel, the unidirectional roller overrunning clutch of ring formation in outer shroud 13, roller 12 and the star-wheel.
Claims (8)
1, a kind of self-pressing stern shaft filler seal, comprise seal arrangement body (1), axle sleeve (8) and Gland (6), at described seal arrangement body (1), be filled with stuffing box packing (3) in the packing cavity that axle sleeve (8) and Gland (6) are surrounded, it is characterized in that: described Gland (6) is loaded on the described axle sleeve (8) by connecting thread (7), is provided with check device between Gland (6) and seal arrangement body (1).
2, self-pressing stern shaft filler seal according to claim 1, it is characterized in that: described check device comprises check pawl (5) and non-return ratchet (11), described check pawl (5) is hinged on Gland (6), non-return ratchet (11) then is arranged on the seal arrangement body (1), and this check pawl (5) is corresponding with non-return ratchet (11) position.
3, self-pressing stern shaft filler seal according to claim 1, it is characterized in that: described check device comprises check pawl (5) and non-return ratchet (11), described check pawl (5) is hinged on seal arrangement body (1), non-return ratchet (11) then is arranged on the Gland (6), and this check pawl (5) is corresponding with non-return ratchet (11) position.
4, according to claim 2 or 3 described self-pressing stern shaft filler seals, it is characterized in that: described check pawl (5) has two and be symmetrical arranged.
5, self-pressing stern shaft filler seal according to claim 1, it is characterized in that: described check device is unidirectional roller overrunning clutch, it comprises roller (12), outer shroud (13) and roller wedge surface (15), and this roller (12) is arranged between outer shroud (13) and the roller wedge surface (15).
6, self-pressing stern shaft filler seal according to claim 5, it is characterized in that: described outer shroud (13) fixedly is flush-mounted in the Gland (6), described roller wedge surface (15) is arranged on the axle sleeve (8), and this roller wedge surface (15) has three and circumferentially uniform along axle sleeve (8).
7, self-pressing stern shaft filler seal according to claim 5, it is characterized in that: described outer shroud (13) fixedly is flush-mounted in the Gland (6), on described roller wedge surface (15) is arranged at and encircles in the star-wheel, this star-wheel inner ring sleeve is loaded on the axle sleeve (8), and roller wedge surface (15) has five and circumferentially uniform along ring in the star-wheel.
8, according to claim 1,2,3,5,6 or 7 described self-pressing stern shaft filler seals, it is characterized in that: described axle sleeve (8) is fixedly installed on the stern tube shaft (10) by the folder axle collar (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100205472A CN101509555A (en) | 2008-02-13 | 2008-02-13 | Self-pressing stern shaft filler seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100205472A CN101509555A (en) | 2008-02-13 | 2008-02-13 | Self-pressing stern shaft filler seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101509555A true CN101509555A (en) | 2009-08-19 |
Family
ID=41002044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100205472A Pending CN101509555A (en) | 2008-02-13 | 2008-02-13 | Self-pressing stern shaft filler seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101509555A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104972090A (en) * | 2015-07-13 | 2015-10-14 | 江苏联峰能源装备有限公司 | Fixed section carrier roller of continuous casting machine |
| CN111425595A (en) * | 2020-04-17 | 2020-07-17 | 中船黄埔文冲船舶有限公司 | Semi-ship floating stern shaft sealing tool and sealing method |
| CN112343811A (en) * | 2020-11-06 | 2021-02-09 | 常州拓川泵业科技有限公司 | Plunger metering pump packing compact structure |
-
2008
- 2008-02-13 CN CNA2008100205472A patent/CN101509555A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104972090A (en) * | 2015-07-13 | 2015-10-14 | 江苏联峰能源装备有限公司 | Fixed section carrier roller of continuous casting machine |
| CN111425595A (en) * | 2020-04-17 | 2020-07-17 | 中船黄埔文冲船舶有限公司 | Semi-ship floating stern shaft sealing tool and sealing method |
| CN111425595B (en) * | 2020-04-17 | 2022-05-10 | 中船黄埔文冲船舶有限公司 | Semi-ship floating stern shaft sealing tool and sealing method |
| CN112343811A (en) * | 2020-11-06 | 2021-02-09 | 常州拓川泵业科技有限公司 | Plunger metering pump packing compact structure |
| CN112343811B (en) * | 2020-11-06 | 2022-04-05 | 常州拓川泵业科技有限公司 | Plunger metering pump packing compact structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090819 |