Airtight shaft end labyrinth seal structure

Abstract

The utility model discloses an airtight shaft end labyrinth sealing structure which is arranged on a rotating shaft, a sealing moving ring, a sealing static ring, a plurality of sealing fillers and a sealing gland are sleeved on the rotating shaft, the sealing moving ring and the rotating shaft are fixed in a clasping mode, and the end face of the sealing static ring and the end face of the sealing moving ring are attached and compressed to form a sealing face. The sealing seat is provided with an air hole, the inner side of the air hole leads to the outer end face of the sealing static ring, and the air hole is provided with a quick-plug connector which is externally connected with a compressed air source. The sealing static ring is arranged for sealing, even if the sealing static ring is abraded, the sealing static ring and the sealing moving ring can be attached through automatic adjustment of compressed air, so that the sealing effect continues to be achieved, meanwhile, the compressed air can drive away materials on the sealing face, abrasion of the sealing face is delayed, and the sealing effect is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing components, in particular to an airtight shaft end labyrinth sealing structure. Background Art

[0002] Existing sealing structures generally include:

[0003] 1. Packing seal: It is easy to wear when used on the shaft end. After wear, the seal will fail quickly and have a short service life;

[0004] 2. End face gas seal: difficult to maintain and replace, high installation precision, once worn, it needs to be replaced, otherwise the seal will fail quickly;

[0005] 3. Labyrinth seal: It has high installation accuracy, but the sealing effect is poor for materials with good fluidity. Utility Model Content

[0006] The utility model aims to provide an airtight shaft end labyrinth seal structure in view of the defects and shortcomings of the prior art.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an airtight shaft end labyrinth seal structure, which is arranged on a rotating shaft, and its innovation lies in: a sealing dynamic ring, a sealing static ring, a plurality of sealing fillers and a sealing gland are sleeved on the rotating shaft, the sealing dynamic ring is tightly fixed to the rotating shaft, the sealing static ring and the sealing dynamic ring end face are pressed together to form a sealing surface, the sealing static ring has a boss, and the sealing dynamic ring has a groove, the boss and the groove form a concave-convex fit, thereby forming a labyrinth seal, the outer sleeve of the sealing dynamic ring is sleeved on the sealing end face, the sealing dynamic ring and the sealing static ring are tightly pressed together to form a sealing surface, And the outsides of multiple sealing fillers are sleeved with the same sealing seat, the outer ring of the sealing static ring is provided with a positioning surface, and the inner side of the sealing seat is provided with a positioning block, the positioning surface and the positioning block are matched, so that after the sealing static ring and the sealing seat are fixed, the sealing static ring does not rotate with the rotating shaft, the sealing seat is fixed to the sealing end face by a fixing bolt, the sealing gland is pressed and fixed to the sealing seat by a clamping bolt, an air hole is provided on the sealing seat, the inner side of the air hole leads to the outer end face of the sealing static ring, the air hole is provided with a quick-plug connector, and the quick-plug connector is externally connected to a compressed air source.

[0008] Furthermore, a sealing gasket is arranged between the sealing seat and the sealing end surface, and the inner side of the sealing gasket is firmly attached to the sealing dynamic ring.

[0009] Furthermore, the sealing filler is located between the sealing static ring and the sealing gland, and is compressed and fixed by the sealing gland.

[0010] Furthermore, the sealing static ring adopts a split structure.

[0011] Furthermore, the sealing static ring is made of polymer wear-resistant material.

[0012] After adopting the above structure, the utility model has the following beneficial effects:

[0013] 1. The utility model seals by setting a sealing static ring. Even if the sealing static ring is worn, the compressed air can automatically adjust the sealing static ring and the sealing dynamic ring to fit together, so as to continue to achieve the sealing effect. At the same time, the compressed air can also drive away the material on the sealing surface, delay the wear of the sealing surface, and prolong the sealing effect.

[0014] 2. The utility model uses a four-fold seal combination of end face seal, labyrinth seal, air seal and packing seal, which greatly improves the service life and has a wide applicability, and is also applicable to materials with good fluidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the external structure of the utility model;

[0017] Figure 3 It is an explosion diagram of the utility model.

[0018] Description of reference numerals:

[0019] 1 rotating shaft, 2 sealing dynamic ring, 21 groove, 3 sealing static ring, 31 boss, 32 positioning surface, 4 sealing packing, 5 sealing gland, 6 sealing end surface, 7 sealing seat, 71 positioning block, 72 air hole, 8 fixing bolt, 9 clamping bolt, 10 quick plug connector, 11 sealing gasket. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings.

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.

[0022] See also Figure 1-3A gas-tight shaft end labyrinth seal structure is arranged on a rotating shaft 1. A sealing dynamic ring 2, a sealing static ring 3, a plurality of sealing packings 4 and a sealing gland 5 are sleeved on the rotating shaft 1. The sealing dynamic ring 2 is tightly fixed to the rotating shaft 1. The sealing static ring 3 and the end face of the sealing dynamic ring 2 are pressed together to form a sealing surface. The sealing static ring 3 has a boss 31, and the sealing dynamic ring 2 has a groove 21. The boss 31 and the groove 21 form a concave-convex fit to form a labyrinth seal. The outer part of the sealing dynamic ring 2 is sleeved with a sealing end face 6. The outer parts of the sealing dynamic ring 2, the sealing static ring 3 and the plurality of sealing packings 4 are sleeved with the same The sealing seat 7 and the outer ring of the sealing static ring 3 are provided with a positioning surface 32, and a positioning block 71 is provided on the inner side of the sealing seat 7. The positioning surface 32 cooperates with the positioning block 71, so that after the sealing static ring 3 and the sealing seat 7 are fixed, the sealing static ring 3 does not rotate with the rotating shaft 1. The sealing seat 7 is fixed to the sealing end face 6 by the fixing bolt 8, and the sealing gland 5 is pressed and fixed to the sealing seat 7 by the clamping bolt 9. The sealing seat 7 is provided with an air hole 72, and the inner side of the air hole 72 leads to the outer end face of the sealing static ring 3. The air hole 72 is provided with a quick-connect connector 10, and the quick-connect connector 10 is externally connected to a compressed air source. Specifically, when the sealing static ring 3 is worn to a certain extent, the compressed air automatically adjusts the sealing static ring 3 to fit with the sealing dynamic ring 2 through the quick-plug connector 10. In addition, the compressed air can also blow the material on the sealing mating surface clean, thereby achieving a continuous sealing effect and extending the service life. When the end faces of the sealing static ring 3 and the sealing dynamic ring 2 that first contact the material are worn, the material can only reach the end face seal below through the sealing labyrinth. The compressed air can still play a sealing role through the quick-plug connector 10. When the end faces of the sealing static ring 3 are worn, the fitting surface of the sealing static ring 3 and the rotating shaft 1 and the sealing packing 4 can also play a sealing role. The combination of end face sealing, labyrinth sealing, air sealing and packing sealing can greatly improve the service life of the sealing structure.

[0023] In this embodiment, a sealing gasket 11 is arranged between the sealing seat 7 and the sealing end face 6. The inner side of the sealing gasket 11 is firmly attached to the sealing dynamic ring 2, which can prevent the material from being blown to the fitting surface between the sealing dynamic ring 2 and the sealing static ring 3 due to air pressure and other reasons inside the equipment, thereby further delaying the wear of the sealing surface and prolonging the sealing effect.

[0024] In this embodiment, the sealing filler 4 is located between the sealing static ring 3 and the sealing gland 5, and is compressed and fixed by the sealing gland 5. The number of the sealing fillers can be determined according to actual conditions; the sealing filler can be a sealing ring.

[0025] In this embodiment, the sealing static ring 3 may also adopt a split structure to facilitate the replacement of accessories at a later stage.

[0026] In this embodiment, the sealing static ring 3 is made of a wear-resistant polymer material to increase its service life. The sealing static ring may also be made of other wear-resistant materials as long as they can achieve a safe sealing effect.

[0027] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. An airtight shaft end labyrinth seal structure, arranged on a rotating shaft, characterized in that: The rotating shaft is sleeved with a sealing dynamic ring, a sealing static ring, a plurality of sealing fillers and a sealing gland. The sealing dynamic ring is tightly fixed to the rotating shaft. The sealing static ring and the end face of the sealing dynamic ring are pressed together to form a sealing surface. The sealing static ring is provided with a boss, and the sealing dynamic ring is provided with a groove. The boss and the groove form a concave-convex fit, thereby forming a labyrinth seal. The outer portion of the sealing dynamic ring is sleeved with the sealing end face. The outer portions of the sealing dynamic ring, the sealing static ring and the plurality of sealing fillers are sleeved with the same sealing seat. A positioning surface is provided on the outer ring of the sealing static ring. A positioning block is provided on the inner side of the sealing seat. The positioning surface cooperates with the positioning block, so that after the sealing static ring and the sealing seat are fixed, the sealing static ring does not rotate with the rotating shaft. The sealing seat is fixed to the sealing end face by fixing bolts. The sealing gland is pressed and fixed to the sealing seat by clamping bolts. An air hole is provided on the sealing seat. The inner side of the air hole leads to the outer end face of the sealing static ring. The air hole is provided with a quick-connect connector, and the quick-connect connector is externally connected to a compressed air source.

2. The airtight shaft end labyrinth seal structure according to claim 1, characterized in that: A sealing gasket is arranged between the sealing seat and the sealing end surface, and the inner side of the sealing gasket is firmly attached to the sealing dynamic ring.

3. The airtight shaft end labyrinth seal structure according to claim 1, characterized in that: The sealing filler is located between the sealing static ring and the sealing gland, and is compressed and fixed by the sealing gland.

4. The airtight shaft end labyrinth seal structure according to claim 1, characterized in that: The sealing static ring adopts a split structure.

5. The airtight shaft end labyrinth seal structure according to claim 1, characterized in that: The sealing static ring is made of high molecular wear-resistant material.

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