CN212004240U - Shaft end sealing device - Google Patents
Shaft end sealing device Download PDFInfo
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- CN212004240U CN212004240U CN202020322279.6U CN202020322279U CN212004240U CN 212004240 U CN212004240 U CN 212004240U CN 202020322279 U CN202020322279 U CN 202020322279U CN 212004240 U CN212004240 U CN 212004240U
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- rotating shaft
- assembling groove
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Abstract
A shaft end sealing device comprises a shaft seat provided with a rotating shaft, wherein the shaft seat is respectively provided with a first assembling groove and a second assembling groove; the front end of the rotating shaft is connected with a sealing disc, and the end surface of the rear side of the sealing disc is in contact with the inner wall surface of the first assembling groove; a flange is arranged on the outer side of the sealing disc, and a first sealing gasket and a first gland are sleeved on the sealing disc; the first pressing cover presses the first sealing gasket, and the first sealing gasket is respectively pressed on the flange of the sealing disc and the inner wall of the first assembling groove; the rotating shaft is sleeved with a second sealing gasket and a second gland, and the second gland presses the second sealing gasket on the inner wall of the second assembling groove and encircles the rotating shaft. Shaft end sealing device through installation closing disc, seal gasket and gland, constitutes labyrinth seal externally to make seal structure increase to two, make sealing device wholly have the redundancy performance, thereby strengthened sealing performance, and even take place wearing and tearing, also can keep the labyrinth structure, thereby provide stable sealed effect, make the life of device longer.
Description
Technical Field
The utility model belongs to the mechanical equipment field especially relates to a shaft end sealing device.
Background
In order to prevent material leakage, the end part of the stirring shaft of the double horizontal shaft stirrer is provided with a shaft end sealing device. When the double-horizontal-shaft stirrer works, the spiral blades on the stirring shaft not only realize the stirring and mixing effects on materials, but also can form axial pushing on the materials, so that the materials flow and are pushed to the shaft end sealing device.
The structure of the existing shaft end sealing device is mainly a sealing element sleeved on a stirring shaft, and the sealing element is fixed and extruded in the axial direction, so that the sealing element can be encircled on the stirring shaft to realize sealing. The sealing element is generally made of elastic colloid material, has soft texture, is easy to wear after being used for a long time, is easy to harden to reduce the elasticity, and cannot firmly surround and seal the stirring shaft. The material flowing to the shaft end sealing device is easily pushed by the larger thrust of the blades on the stirring shaft to deflect the sealing element, so that the sealing element is separated from the outer wall of the stirring shaft to ensure that the shaft end sealing fails.
SUMMERY OF THE UTILITY MODEL
The utility model discloses there is the problem of life-span weak point, easy wearing and tearing, sealing performance unstable to above-mentioned current axle head sealing device, provides a stable in structure and better axle head sealing device of sealing performance.
In order to achieve the above object, the utility model discloses a technical scheme be:
a shaft end sealing device comprises a shaft seat provided with a rotating shaft, wherein a first assembling groove and a second assembling groove are respectively formed in the front side and the rear side of the shaft seat;
the front end of the rotating shaft sequentially passes through the second assembling groove and the shaft hole arranged on the shaft seat and then is connected with the sealing disc;
the sealing disc is positioned in the first assembling groove, and the end surface of the rear side is in contact with the inner wall surface of the first assembling groove;
an annular flange is arranged on the outer side of the sealing disc, and the thickness of the flange is gradually reduced from inside to outside;
the sealing disc is sleeved with a first sealing gasket and a first gland;
the first sealing gasket is divided into a first contact part positioned on the inner side and a second contact part positioned on the outer side;
the first pressing cover presses the first sealing gasket to press the first contact part and the second contact part on the flange of the sealing disc and the inner wall of the first assembling groove respectively;
the rotating shaft is sleeved with a second sealing gasket and a second pressing cover, the second pressing cover presses the second sealing gasket to fix the second sealing gasket on the inner wall of the second assembling groove in a pressing mode, and the second sealing gasket surrounds the rotating shaft.
Preferably, the first gland is provided with a pressure holding portion, a rear side surface of which matches a front side surface of the flange.
Preferably, the outer wall of the first gland is in interference fit with the inner wall outside the first assembling groove.
Preferably, the front side surface of the flange is a sloped or arcuate surface.
Preferably, the inner wall of the shaft hole is provided with an installation groove, and a sealing ring is installed in the installation groove.
Preferably, two second sealing gaskets are arranged, a spacer ring is arranged between the two second sealing gaskets, the inner diameter of the spacer ring is larger than the outer diameter of the rotating shaft, and a containing cavity arranged between the spacer ring and the rotating shaft is filled with lubricating grease.
Preferably, the fastening bolt arranged on the shaft seat penetrates through the second gland and is provided with a fastening nut, and the fastening nut abuts against the second gland and is used for pressing, holding and fixing the second gland.
Preferably, the rotating shaft comprises a shaft body and a shaft sleeve sleeved and fixed on the shaft body.
Compared with the prior art, the utility model discloses an advantage lies in with positive effect:
1. the utility model discloses an axle head sealing device through installation seal dish, seal gasket and gland, constitutes labyrinth seal externally to make seal structure increase to two, make sealing device wholly have the redundancy performance, thereby strengthened sealing performance, and even take place wearing and tearing, also can keep the labyrinth structure, thereby provide stable sealed effect, make the life of device longer.
2. The first contact part at the inner side of the first sealing gasket deflects to one side under the pushing of the flange on the sealing plate, and generates elastic deformation, so that the first sealing gasket can be more firmly attached to the flange, a gap between the first gland and the flange can be firmly sealed, and the sealing effect is improved.
3. The pressing part of the first gland is matched with the shape of the flange, so that the gap between the pressing part and the flange is stable, and stable clamping force can be kept on the first sealing gasket, thereby ensuring the firmness of the sealing performance.
4. First gland can be fixed on the axle bed through interference fit, simple to operate makes the part processing easy to can provide sufficient pressure to seal gasket and hold the power.
5. The inclined surface of the flange can be a conical surface and can also be an arc surface, so that the local deformation degree of the first sealing gasket is increased, the fitting performance of the first sealing gasket is enhanced, and the sealing performance is further improved.
6. And a sealing ring is arranged between the shaft hole and the main shaft, so that the number of sealing structures is further increased, and the sealing performance is improved.
7. The second seal gasket sets up two, injects lubricating grease in the space that separates through the spacer ring, can make lubricating grease can play the lubrication action, reduces the wearing and tearing between second seal gasket and the pivot, forms the seal structure that the grease constitutes at the pivot outer wall simultaneously to improve sealing performance.
8. The second gland is pressed by the nut on the bolt and is held fixedly, can provide great pressure and hold power to firm play the pressure to the second seal gasket and hold the effect, thereby reinforcing the deformation of second seal gasket in radial ascending, guarantee that it can be firm encircle the pivot, guarantee sealing performance.
Drawings
Fig. 1 is a sectional structural view of the shaft end sealing device of the present invention;
in the above figures: 1. a rotating shaft; 11. a shaft body; 12. a shaft sleeve; 2. a shaft seat; 21. a first fitting groove; 22. a second assembly groove; 23. a shaft hole; 24. mounting grooves; 25. fastening a bolt; 26. fastening a nut; 3. sealing the disc; 31. a flange; 41. a first sealing gasket; 41a, a first contact portion; 41b, a second contact portion; 42. a second sealing gasket; 43. a spacer ring; 51. a first gland; 51a, a pressure holding part; 52. a second gland; 6. a seal ring; 7. a receiving cavity.
Detailed Description
The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1, the utility model provides a shaft end sealing device, which comprises a rotating shaft 1 and a shaft seat 2.
The rotating shaft 1 is installed in a shaft hole 23 provided in the shaft seat 2, and a first assembling groove 21 and a second assembling groove 22 are respectively provided on the front side and the rear side of the shaft seat 2.
The shaft hole 23 is located between the first assembling groove 21 and the second assembling groove 22, the front end of the rotating shaft 1 is connected with the sealing disc 3, and the sealing disc 3 is located in the first assembling groove 21. The rotating shaft 1 extends into the second assembling groove 22 and is connected with the sealing disc 3 after passing through the shaft hole 23.
The end face of the closing disk 3 on the rear side is in contact with the inner wall surface of the first fitting groove 21, so that the closing disk 3 can slide on the inner wall of the first fitting groove 21.
The outer side of the closing disk 3 is provided with an annular flange 31, and the thickness of the flange 31 is gradually reduced from inside to outside, so that the front side surface of the flange 31 is inclined.
The sealing plate 3 is sleeved with a first sealing gasket 41 and a first gland 51.
The first seal gasket 41 is a seal gasket and is divided into a first contact portion 41a located on the inner side and a second contact portion 41b located on the outer side.
The first cover 51 is pressed against the first sealing gasket 41, and the first contact portion 41a and the second contact portion 41b are pressed against the flange 31 of the closing disk 3 and the inner wall of the first fitting groove 21, respectively, thereby sealing the gap between the first cover 51 and the flange 31 and the gap between the first cover 51 and the inner wall of the first fitting groove 21.
The second sealing gasket 42 and the second gland 52 are sleeved on the rotating shaft 1.
The second sealing gasket 42 is a sealing rubber gasket, the second gland 52 presses on the second sealing gasket 42, and presses and fixes the second sealing gasket 42 on the inner wall of the second assembling groove 22, and meanwhile, the second sealing gasket 42 is flattened, and the inner diameter of the second sealing gasket is reduced, so that the second sealing gasket surrounds the rotating shaft 1, and the sealing of the rotating shaft 1 is realized.
The front side of the shaft seat 2 is an inner space for accommodating materials of the stirrer, and the rear side is an outer space of the stirrer.
The raised flange 31 on the outer wall of the closing disk 3 forms a zigzag labyrinth structure in the gap between the closing disk 3 and the first fitting groove 21 and the gap between the first gland 51 and the closing disk 3, and the first sealing gasket 41 is located in the labyrinth structure gap.
The material in the mixer can pass through the labyrinth gap between the seal disk 3 and the first gland 51, the labyrinth gap makes the liquid flow resistance large, and the first seal gasket 41 seals the labyrinth gap, so that the material is difficult to leak to the mixer outer space.
The second sealing gasket 42 tightly encircles the rotating shaft 1, seals the gap between the rotating shaft 1 and the shaft seat 2, and prevents the material from leaking.
When the rotating shaft 1 rotates, the second sealing gasket 42 is in sliding contact with the outer wall of the rotating shaft 1, so that the rotating shaft 1 is kept environment-friendly and sealed; when the sealing plate 3 rotates along with the rotating shaft 1, the front side surface of the flange 31 is in sliding contact with the surface of the first sealing gasket 41, and the first gland 51 is fixed, so that the first sealing gasket 41 is kept pressed, and the clearance of the labyrinth structure is always sealed.
Two sealing structures are formed on the front side and the rear side of the shaft seat 2, so that the stability of the sealing effect is ensured. The first gasket 41 has a large contact area with the first gland 51 and the flange 31, and the first gasket 41 is pushed by the flange 31 so that the inner first contact portion 41a is bent forward, and the generated elastic force presses the first gasket 41 more firmly against the flange, thereby providing a strong sealing performance. The thickness of the flange 31 is gradually reduced from inside to outside, so that the bent part of the first sealing gasket 41 is smooth, and can be in better surface contact with the flange 31, thereby ensuring good sealing performance.
In order to further ensure that the gap between the first gland 51 and the flange 31 can be satisfactorily sealed by the first pressure-holding gasket 41, the first gland 51 is provided with a pressure-holding portion 51 a.
The back side surface of the pressure holding part 51a is matched with the front side surface of the flange 31, so that the gaps of the pressure holding part and the flange 31 at the same radial position are always kept the same, the width of the gap is uniform, the two side surfaces of the first pressure holding gasket 41 can be fully contacted with the pressure holding part 51a and the flange 31, the pressure holding force is uniform, and both sides of the first pressure holding gasket 41 can be well sealed.
In order to achieve the fixation of the first gland 51, an outer wall of the first gland 51 is interference-fitted with an inner wall outside the first fitting groove 21.
Through interference fit, the first gland 51 can be firmly fixed in the first assembling groove 21 without a connecting piece, and the assembly is convenient and the processing is easy.
The first pressing cover 51 may be fixed in the first fitting groove 21 by a conventional connection means such as bolts and screw-fitting.
In order to incline the front side surface of the flange 31 and keep the forward support of the first pressure holding pad 41, the front side surface of the flange 31 may adopt an inclined surface, i.e. a conical surface structure; the front side surface of the flange 31 can also be an arc surface, the first pressing gasket 41 can generate arc deformation under the support of the flange 31 due to the sunken arc surface, the deformation degree is larger, and the generated elastic force can enable the gasket to be more firmly attached to the flange 31, so that the sealing performance is improved.
In order to further ensure the sealing performance, the inner wall of the shaft hole 23 is provided with a mounting groove 24, and a sealing ring 6 is mounted in the mounting groove 24.
The sealing ring 6 can play a role in sealing in the shaft hole 23, so that the number of sealing structures is increased, and the stability of the sealing effect is improved.
In order to further improve the sealing effect, two second sealing gaskets 42 are arranged at intervals.
A spacer ring 43 is provided between the two second sealing gaskets 42, and the two second sealing gaskets 42 clamp and fix the spacer ring 43 by the pressing of the second gland 52.
The spacer ring 43 has an inner diameter larger than the outer diameter of the rotating shaft 1, so that an annular space is formed therebetween as the accommodating chamber 7, and the accommodating chamber 7 is filled with grease.
Lubricating grease can closely wrap on the outer wall of the rotating shaft 1, and plays a role in sealing. Meanwhile, the lubricating grease can flow into the space between the second sealing gasket 42 and the outer wall of the rotating shaft 1, so that not only is the gap between the second sealing gasket 42 and the rotating shaft 1 sealed, but also the sliding of the second sealing gasket 42 on the rotating shaft 1 is lubricated, the abrasion of the second sealing gasket 42 is reduced, and the service life is prolonged. The grease can further flow into the labyrinth gap, and together with the first seal gasket 41, the labyrinth gap between the seal disk 3 and the first gland 51 can be sealed, thereby further improving the sealing performance of the seal structure.
In order to ensure the pressing firmness of the second sealing gasket 42, the fastening bolt 25 arranged on the shaft seat 2 penetrates through the second pressing cover 52 and is provided with the fastening nut 26.
The fastening nut 26 is tightened to abut against the rear side surface of the second gland 26 and press-holds the second gland 26 in place.
The fastening bolt 25 can also pass through the second sealing gasket 42 and the spacer ring 43 to position them radially.
Because 1 outer wall of pivot is easy wearing and tearing, in order to reduce the maintenance cost, pivot 1 includes axis body 11 and axle sleeve 12, and axle sleeve 12 suit is on axis body 11 to through current connecting piece such as bolt, with axle sleeve 12 and axis body 11 rigid coupling. When the outer wall of the rotating shaft 1 is abraded, the shaft sleeve 12 is replaced.
Claims (8)
1. The shaft end sealing device is characterized by comprising a shaft seat (2) provided with a rotating shaft (1), wherein the front side and the rear side of the shaft seat (2) are respectively provided with a first assembling groove (21) and a second assembling groove (22);
the front end of the rotating shaft (1) sequentially passes through a second assembling groove (22) and a shaft hole (23) formed in the shaft seat (2) and then is connected with a sealing disc (3);
the seal disc (3) is positioned in the first assembling groove (21), and the end surface of the rear side is in contact with the inner wall surface of the first assembling groove (21);
an annular flange (31) is arranged on the outer side of the sealing disc (3), and the thickness of the flange (31) is gradually reduced from inside to outside;
the sealing plate (3) is sleeved with a first sealing gasket (41) and a first gland (51);
the first sealing gasket (41) is divided into a first contact part (41a) positioned on the inner side and a second contact part (41b) positioned on the outer side;
the first gland (51) presses on the first sealing gasket (41) to press the first contact part (41a) and the second contact part (41b) on the flange (31) of the sealing plate (3) and the inner wall of the first assembling groove (21), respectively;
the rotating shaft (1) is sleeved with a second sealing gasket (42) and a second gland (52), and the second gland (52) is pressed on the second sealing gasket (42) to press and fix the second sealing gasket (42) on the inner wall of the second assembling groove (22) and surround the rotating shaft (1).
2. Shaft end seal according to claim 1, characterized in that the first gland (51) is provided with a pressure holding portion (51a), a rear side surface of the pressure holding portion (51a) matching a front side surface of the flange (31).
3. Shaft end seal according to claim 1, characterized in that the outer wall of the first gland (51) is in interference fit with the inner wall outside the first fitting groove (21).
4. Shaft end seal according to claim 1, characterized in that the front side surface of the flange (31) is a bevel or an arc.
5. Shaft end sealing device according to claim 1, characterized in that the inner wall of the shaft hole (23) is provided with a mounting groove (24), and the mounting groove (24) is internally provided with a sealing ring (6).
6. Shaft end sealing device according to claim 1, characterized in that two second sealing gaskets (42) are provided, and a spacer ring (43) is provided between the two second sealing gaskets (42), the inner diameter of the spacer ring (43) is larger than the outer diameter of the rotating shaft (1), and the accommodating cavity (7) provided between the spacer ring (43) and the rotating shaft (1) is filled with grease.
7. Shaft end seal according to claim 1, characterised in that the shaft seat (2) is provided with a fastening bolt (25) which passes through the second gland (52) and mounts a fastening nut (26), the fastening nut (26) bearing against the second gland (52) for holding the second gland (52) in compression.
8. Shaft end seal according to claim 1, characterized in that the rotary shaft (1) comprises a shaft body (11) and a sleeve (12) which is fitted around and fixed to the shaft body (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020322279.6U CN212004240U (en) | 2020-03-13 | 2020-03-13 | Shaft end sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020322279.6U CN212004240U (en) | 2020-03-13 | 2020-03-13 | Shaft end sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212004240U true CN212004240U (en) | 2020-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020322279.6U Active CN212004240U (en) | 2020-03-13 | 2020-03-13 | Shaft end sealing device |
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| CN (1) | CN212004240U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112719103A (en) * | 2020-11-30 | 2021-04-30 | 珠海格力智能装备有限公司 | Pipe expander joint fixing device and pipe expander |
-
2020
- 2020-03-13 CN CN202020322279.6U patent/CN212004240U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112719103A (en) * | 2020-11-30 | 2021-04-30 | 珠海格力智能装备有限公司 | Pipe expander joint fixing device and pipe expander |
| CN112719103B (en) * | 2020-11-30 | 2022-09-13 | 珠海格力智能装备有限公司 | Pipe expander joint fixing device and pipe expander |
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