CN214946367U

CN214946367U - Shaft end sealing structure for gas medium

Info

Publication number: CN214946367U
Application number: CN202121397703.4U
Authority: CN
Inventors: 林剑红; 陈安定
Original assignee: NINGBO IDT SINYUAN SEALING TECHNOLOGY CO LTD
Current assignee: NINGBO IDT SINYUAN SEALING TECHNOLOGY CO LTD
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2021-11-30
Anticipated expiration: 2031-06-23

Abstract

The utility model discloses a shaft end seal structure for gaseous medium, packing seat and gland including the looks adaptation, packing seat and axle between set up the filler ring group of constituteing by a plurality of filler rings, the upper and lower surface of filler ring in all be provided with the packing recess, packing recess between the adjacent filler ring is to closing and is formed the packing chamber, the packing intracavity fill the packing, the both ends of filler ring group be provided with the clamping ring respectively, the clamping ring in gland and the outside match. The utility model has the advantages that: simple structure, equitable, low in manufacturing cost is through setting up packing ring group to set up the packing recess on the packing ring, the packing is set in the packing recess, the seal structure that forms like this, and the concatenation face of adjacent packing ring all is not located the coplanar with the upper and lower surface of packing, can improve the leakproofness greatly, is applicable to gaseous medium's service environment, and the setting of packing ring still makes the installation of packing become convenient.

Description

Shaft end sealing structure for gas medium

Technical Field

The utility model belongs to the technical field of sealed technique and specifically relates to a shaft end seal structure for gaseous medium.

Background

In mechanical equipment, a sealing structure widely exists, the sealing structure is used for preventing internal media from leaking outwards or preventing external impurities from entering the equipment to influence the normal operation of the equipment, and the common simple sealing structure comprises a gasket, a graphite packing and the like.

Patent application CN201922151605.1 entitled "a shaft end seal for a rotary machine" discloses a shaft end seal for a rotary machine, comprising: the device comprises a packing seal seat, a cooling water pipe, a valve, a graphite packing, a gland, a grease seal box, a pipe joint, a framework oil seal and a nozzle, wherein the packing seal seat is fixedly connected to an end cover of the rotating equipment; the graphite packing rings are the same as most of sealing structures, a plurality of circles of graphite packing rings are arranged and then are compressed to form the sealing structures, no matter how compact the graphite packing rings are, gaps still exist between adjacent graphite packing rings, and because the gaps are located on the same plane, the sealing effect of the structure is poor in the environment that a medium is gas, and therefore the structure of the structure needs to be further improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at making up the above-mentioned not enough, to the social public simple structure, reasonable, low in manufacturing cost, simple to operate's a shaft end seal structure for gaseous medium.

The technical scheme of the utility model is realized like this:

the utility model provides an axle head seal structure for gaseous medium, is including the packing seat and the gland of looks adaptation, packing seat and axle between set up the packing ring group of constituteing by a plurality of drilled packing rings, the upper and lower surface of packing ring in all be provided with the packing recess, the packing recess between the adjacent drilled packing ring closes and forms the packing chamber, the packing intracavity fill the packing, the both ends of packing ring group be provided with the clamping ring respectively, the clamping ring in gland and the outside match.

The measures for further optimizing the technical scheme are as follows:

as an improvement, the pressing ring is provided with a pressing ring groove corresponding to the packing groove.

As an improvement, the section of the packing groove is of a rectangular structure.

As an improvement, the cross section of the packing groove is of a trapezoid structure, and a shorter bottom side in the trapezoid structure is used as an opening.

As an improvement, the gland is in threaded connection with the packing seat.

As a modification, in the packing ring group, the number of packing rings is 3 to 8. Due to the marginal effect, when the number of packing rings is more than 8, the sealing effect is not greatly changed even if the number of packing rings is increased, and the number of packing rings is preferably 3 to 8 in view of economy.

As an improvement, the packing is a graphite packing.

Compared with the prior art, the utility model the advantage be:

the utility model discloses a shaft end seal structure for gaseous medium, simple structure, reasonable, low in manufacturing cost through setting up packing ring group to set up the packing recess on the packing ring, the packing inlays in the packing recess, the seal structure that forms like this, the concatenation face of adjacent packing ring all is not located the coplanar with the upper and lower surface of packing, can improve the leakproofness greatly, is applicable to the service environment of gaseous medium, the setting of packing ring still makes the installation of packing become convenient; the clamping rings arranged at the two ends of the packing ring set can enable the packing ring set to be more compact, and the sealing performance can be further improved.

Drawings

Fig. 1 is a schematic cross-sectional structural view of a first embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of the filler ring of FIG. 1;

FIG. 3 is a partial enlarged view of a packing ring according to an embodiment of the present invention;

fig. 4 is a schematic sectional structure diagram of a third embodiment of the present invention;

figure 5 is a schematic cross-sectional view of the pressure ring of figure 4.

The utility model discloses each reference numeral's name is in the drawing:

the packing ring packing device comprises a packing base seat 1, a gland 2, a shaft 3, a packing ring 4, a packing groove 4a, a packing 5, a pressure ring 6 and a pressure ring groove 6 a.

Detailed Description

The present invention is described in further detail below with reference to the attached drawings:

in the first embodiment, as shown in fig. 1 to 2, a shaft end sealing structure for a gas medium includes a packing seat 1 and a gland 2 which are matched with each other, a packing ring group composed of a plurality of packing rings 4 is arranged between the packing seat 1 and a shaft 3, packing grooves 4a are respectively arranged on the upper surface and the lower surface of each packing ring 4, the packing grooves 4a between the adjacent packing rings 4 are combined to form a packing cavity, packing 5 is filled in the packing cavity, two ends of each packing ring group are respectively provided with a pressing ring 6, and the gland 2 is matched with the pressing ring 6 on the outer side.

The section of the packing groove 4a is of a rectangular structure.

The gland 2 is in threaded connection with the packing base seat 1.

In the packing ring group, the number of packing rings 4 is 3 to 8. Due to the marginal effect, when the number of packing rings is more than 8, the sealing effect is not greatly changed even if the number of packing rings is increased, and the number of packing rings is preferably 3 to 8 in view of economy. In this embodiment, the number of the packing rings 4 is 4.

In this embodiment, the packing 5 is a graphite packing.

The utility model discloses an axle head seal structure adopts and sets up the filler ring group of compriseing a plurality of drilled packing ring 4 between packing seat 1 and axle 3, and the upper and lower surface of drilled packing ring 4 all is provided with packing recess 4a, and packing 5 inlays in the packing intracavity that packing recess 4a closed formation, has guaranteed like this that the concatenation face of adjacent drilled packing ring 4 all is not located the coplanar with the upper and lower surface of packing 5, can improve the leakproofness greatly, is applicable to gaseous medium's service environment. In addition, the packing groove 4a is arranged, so that the packing 5 is convenient to mount, and the sealing failure caused by the damage in the mounting process of the packing 5 is avoided. The arrangement of the compression rings 6 at the two ends of the packing ring set can enable the packing ring set to be more compact, and the sealing performance can be further improved.

In the second embodiment, as shown in fig. 3, the shaft end sealing structure in the present embodiment is similar to the structure in the first embodiment, except that in the present embodiment, the cross section of the packing groove 4a is in a trapezoid structure, and the shorter bottom side in the trapezoid structure is used as an opening. The packing groove 4a with the trapezoidal section is adopted, when the packing 5 is extruded, two sides of the packing deform and are extruded into two sides of the trapezoidal structure to fill the packing groove 4a, and the packing 5 is extruded at the opening, so that the compactness of the packing can be improved; the packing groove 4a with the cross section in a trapezoidal structure is adopted, so that the flexibility of the sealing surface can be further increased, and the sealing performance is improved.

In a third embodiment, as shown in fig. 4 to 5, the shaft end sealing structure in this embodiment is similar to that in the first embodiment, except that in this embodiment, a pressing ring groove 6a corresponding to the packing groove 4a is provided on the pressing ring 6. The pressing ring groove 6a and the packing groove 4a are involuted to form a packing cavity, so that the sealing performance between the packing ring 4 and the pressing ring 6 can be ensured. In this embodiment, the section of the packing groove 4a is a rectangular structure; the cross section of the packing groove 4a may also adopt the same trapezoidal structure as in the second embodiment.

The above is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, and it should be appreciated by those skilled in the art that various equivalent substitutions and obvious changes made in the specification and drawings should be included within the scope of the present invention.

Claims

1. The utility model provides a shaft end seal structure for gaseous medium, includes packing seat (1) and gland (2) of looks adaptation, characterized by: packing ring group of constituteing by a plurality of drilled packing rings (4) sets up between packing ring seat (1) and axle (3), the upper and lower surface of drilled packing ring (4) in all be provided with packing recess (4a), packing recess (4a) between adjacent drilled packing ring (4) to closing and form the packing chamber, the packing intracavity fill packing (5), the both ends of packing ring group be provided with clamping ring (6) respectively, gland (2) match with clamping ring (6) in the outside.

2. A shaft end seal arrangement for a gaseous medium as defined in claim 1, wherein: the pressing ring (6) is provided with a pressing ring groove (6a) corresponding to the packing groove (4 a).

3. A shaft end seal arrangement for a gaseous medium as defined in claim 2, wherein: the section of the packing groove (4a) is of a rectangular structure.

4. A shaft end seal arrangement for a gaseous medium as defined in claim 2, wherein: the section of the packing groove (4a) is of a trapezoid structure, and a shorter bottom side in the trapezoid structure is used as an opening.

5. An axial end seal construction for a gaseous medium as claimed in any one of claims 1 to 4, further comprising: the gland (2) is in threaded connection with the packing base seat (1).

6. A shaft end seal arrangement for a gaseous medium as defined in claim 5, wherein: in the packing ring group, the number of packing rings (4) is 3 to 8.

7. A shaft end seal arrangement for a gaseous medium as defined in claim 6, wherein: the packing (5) is a graphite packing.