CN215806299U - Novel large-spring mechanical seal - Google Patents

Abstract

The utility model discloses a novel large spring mechanical seal, which comprises a spring mechanical seal, wherein the spring mechanical seal is a large spring mechanical seal structure and comprises a fixed shaft and a connecting shaft which are in elastic connection; when the rotation produces the axial float, through fixed axle and connecting axle atress extrusion this moment, big spring elastic contraction, produce an elasticity rebound effort at the in-process of shrink, opposite with the effort of axial float, realize the buffering when to the axial float, cooperation between inserted bar and the slot, peg graft in the inside of slot under the big spring normality, the upper end leaves the space, the inserted bar of being convenient for moves in the slot, can keep axial float between fixed axle and the connecting axle, avoid appearing radial float to the wearing and tearing of axle head, the little spring of fixed axle and the annular array connection of connecting axle outer wall, axial buffering effect when having improved the motion of spring mechanical seal, the long-time axial of big spring has been reduced simultaneously and has been used the elastic potential energy that causes and descend.

Description

Novel large-spring mechanical seal

Technical Field

The utility model relates to the field of mechanical seal, in particular to a novel large-spring mechanical seal.

Background

The mechanical seal is a shaft seal device of a rotating machine. Such as centrifugal pumps, centrifuges, reaction kettles, compressors, and the like. Since the drive shaft extends through the inside and outside of the apparatus, there is a circumferential gap between the shaft and the apparatus through which the medium in the apparatus leaks out, and if the pressure in the apparatus is lower than atmospheric pressure, air leaks into the apparatus, so that a shaft seal device must be provided to prevent leakage. The shaft seal has many kinds, and the mechanical seal has the advantages of small leakage amount, long service life and the like, so the mechanical seal is the most important shaft sealing mode in the devices in the world. Mechanical seals, also called face seals, are defined in the relevant national standards as follows: "means for preventing fluid leakage, which is composed of at least one pair of end faces perpendicular to the rotation axis, and which are kept in fit and relatively slide under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism and the cooperation of the auxiliary seal.

The large spring is connected between a fixing shaft and a connecting shaft, and buffers the axial movement of the mechanical sealing structure, however, in the actual use process of the axial movement, certain radial deviation can be caused between the fixing shaft and the connecting shaft, meanwhile, the elastic connection performance of the connecting part of the fixing shaft and the outer wall of the connecting shaft is poor, elastic deviation is easily caused, the process of long-time radial movement is caused, the surface of the shaft end of the fixing shaft and the surface of the connecting shaft are frosted, the abrasion of the connecting part of the shaft end, the fixing shaft and the connecting shaft is caused by long-time use, and further the normal use of the mechanical sealing structure of the spring is influenced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a novel large spring mechanical seal, which can reduce the radial play of the spring mechanical seal while ensuring the buffer of the axial play of the spring mechanical seal.

In order to solve the technical problems, the utility model provides the following technical scheme: a novel large spring mechanical seal comprises a spring mechanical seal, wherein the spring mechanical seal is a large spring mechanical seal structure, and comprises a fixed shaft and a connecting shaft which are in elastic connection;

and the stabilizing springs are elastically connected between the fixed shaft and the connecting shaft and are in an annular array, and the stabilizing springs are movably inserted into the lower surface of the fixed shaft up and down.

As a preferred technical scheme of the utility model, the spring mechanical seal comprises a slot annularly formed on the lower surface of the fixed shaft, a large spring connected between the fixed shaft and the connecting shaft, the connecting shaft is of a concave through structure, the lower end of the large spring is connected with the concave surface of the connecting shaft, and the lower end of the connecting shaft is rotatably connected with a rotating shaft.

As a preferred technical scheme of the utility model, a rubber ring is arranged at the joint of the lower surface of the fixed shaft and the outer wall of the connecting shaft, and a plurality of through holes are annularly formed in the rubber ring.

As a preferable technical scheme of the utility model, the rubber ring is of an outward convex structure, and each group of through holes are formed in one side of the stabilizing spring.

As a preferred technical scheme of the utility model, the stabilizing spring comprises a plurality of small springs connected between the fixed shaft and the connecting shaft, the inside of each group of small springs is provided with an inserted bar matched with the slot, and the lower end of each group of inserted bars is fixedly installed with the connecting shaft.

As a preferred technical scheme of the utility model, each group of the inserted rods is vertically and symmetrically provided with grooves.

Compared with the prior art, the utility model can achieve the following beneficial effects:

1. the fixed shaft is connected with the rotating shaft at the lower end of the connecting shaft and the shaft end through the small spring and the inserted rod, when the rotation generates axial movement, the fixing shaft and the connecting shaft are stressed and extruded at the moment, the large spring elastically contracts, an elastic rebound acting force is generated in the contraction process and is opposite to the acting force of the axial float, thereby realizing the buffer of the axial movement, and simultaneously, the large spring is inserted in the slot under the normal state through the matching between the inserting rod and the slot, and the upper end is provided with a gap, so that the inserted bar can conveniently move in the slot, the axial movement can be kept between the fixed shaft and the connecting shaft, the abrasion of the shaft end caused by the radial movement is avoided, meanwhile, the small springs are connected with the outer wall of the connecting shaft in an annular array mode through the fixing shaft, the axial buffering effect of the springs in the mechanical sealing movement process is improved, and meanwhile the reduction of elastic potential energy caused by long-time axial use of the large springs is reduced.

2. Through the rubber ring that sets up, be provided with the rubber ring through fixed axle lower surface and connecting axle outer wall junction, avoid at the in-process of the use of installation, little spring interferes with other accessories, plays the effect of protection to little spring, the circulation of lubricated liquid when being convenient for the internal motion through a plurality of through-holes that the rubber ring annular was seted up simultaneously.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic illustration of an explosive structure according to the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 2 according to the present invention;

FIG. 4 is a schematic cross-sectional view of the present invention;

FIG. 5 is a cross-sectional view of the connecting shaft of the present invention;

fig. 6 is a schematic cross-sectional view of a stationary shaft according to the present invention.

Wherein: 1. a spring mechanical seal; 11. a fixed shaft; 111. a slot; 12. a connecting shaft; 13. a large spring; 14. a rotating shaft; 15. a rubber ring; 151. a through hole;

2. a stabilizing spring; 21. a small spring; 22. inserting a rod; 221. and (4) a groove.

Detailed Description

The present invention will be further described with reference to specific embodiments for the purpose of facilitating an understanding of technical means, characteristics of creation, objectives and functions realized by the present invention, but the following embodiments are only preferred embodiments of the present invention, and are not intended to be exhaustive. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used in the following examples are commercially available unless otherwise specified.

Example (b):

as shown in fig. 1-6, the present invention provides a novel large spring mechanical seal, which comprises a spring mechanical seal 1, wherein the spring mechanical seal 1 is a large spring mechanical seal structure, and the spring mechanical seal 1 comprises a fixed shaft 11 and a connecting shaft 12 which are elastically connected; the stabilizing springs 2 are elastically connected between the fixed shaft 11 and the connecting shaft 12, and are arranged in a plurality of groups in an annular array, and the stabilizing springs 2 are movably inserted into the lower surface of the fixed shaft 11 up and down.

When in use, the fixed shaft 11 and the rotating shaft 14 at the lower end of the connecting shaft 12 are connected with the shaft end, when the rotation generates the axial movement, the large spring 13 is elastically contracted by the forced extrusion of the fixed shaft 11 and the connecting shaft 12, an elastic rebound acting force is generated in the contraction process and is opposite to the acting force of the axial float, thereby realizing the buffer of the axial movement, and simultaneously, the large spring 13 is inserted in the slot 111 under the normal state through the matching between the inserted link 22 and the slot 111, and the gap is reserved at the upper end, so that the inserted bar 22 can conveniently move in the slot 111, the axial movement can be kept between the fixed shaft 11 and the connecting shaft 12, the abrasion of the axial end caused by the radial movement is avoided, meanwhile, the small springs 21 connected with the outer wall of the connecting shaft 12 in an annular array mode through the fixing shaft 11 improve the axial buffering effect of the mechanical spring seal 1 during movement, and meanwhile, the reduction of elastic potential energy caused by long-time axial use of the large spring 13 is reduced.

In other embodiments, the spring mechanical seal 1 includes a slot 111 annularly formed on the lower surface of the fixed shaft 11, a large spring 13 connected between the fixed shaft 11 and the connecting shaft 12, the connecting shaft 12 is of a concave through structure, the lower end of the large spring 13 is connected with the connecting shaft 12 in a concave manner, and the lower end of the connecting shaft 12 is rotatably connected with the rotating shaft 14.

Through fixed axle 11 and connecting axle 12 atress extrusion, big spring 13 elastic shrinkage produces an elasticity rebound effort at the in-process of shrink, and is opposite with the effort of axial float, and then realizes the buffering when the axial float, and connecting axle 12 is the through structure of indent type, and big spring 13 lower extreme is connected with connecting axle 12 concave surface, the fixed mounting of the big spring 13 of being convenient for, and can keep big spring 13 at the inside stability of connecting axle 12.

In other embodiments, a rubber ring 15 is disposed at the joint of the lower surface of the fixed shaft 11 and the outer wall of the connecting shaft 12, and a plurality of through holes 151 are annularly formed in the rubber ring 15.

Be provided with rubber ring 15 through fixed axle 11 lower surface and connecting axle 12 outer wall junction, avoid at the in-process of the use of installation, little spring 21 interferes with other accessories, plays the effect of protection to little spring 21, the circulation of lubricated liquid when being convenient for the inside motion through a plurality of through-holes 151 that rubber ring 15 annular was seted up simultaneously.

In other embodiments, the rubber ring 15 is an outward convex structure, and each set of through holes 151 is opened on one side of the stabilizing spring 2, so as to avoid interference of the compression of the rubber ring 15 on the small spring 21 in the process of contraction of the rubber ring 15.

In other embodiments, the stabilizing spring 2 includes a plurality of small springs 21 connected between the fixing shaft 11 and the connecting shaft 12, an inserting rod 22 engaged with the slot 111 is disposed inside each group of small springs 21, and the lower end of each group of inserting rods 22 is fixedly mounted with the connecting shaft 12.

Through the small springs 21 connected with the outer wall of the connecting shaft 12 in an annular array mode through the fixing shaft 11, the axial buffering effect of the mechanical spring seal 1 during movement is improved, meanwhile, the reduction of elastic potential energy caused by long-time axial use of the large spring 13 is reduced, and through the matching of the inserted rod 22 and the slot 111, axial movement can be kept between the fixing shaft 11 and the connecting shaft 12, and abrasion of the shaft end due to radial movement is avoided.

In other embodiments, each group of the insertion rods 22 is vertically and symmetrically provided with the grooves 221, so that the insertion rods 22 can slide up and down in the insertion slots 111 conveniently, and a large reverse acting force generated in the process of the insertion movement of the insertion rods 22 by the lubricating liquid in the insertion slots 111 is avoided.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (6)

1. The utility model provides a novel big spring mechanical seal, including spring mechanical seal (1), its characterized in that: the spring mechanical seal (1) is a large spring mechanical seal structure, and the spring mechanical seal (1) comprises a fixed shaft (11) and a connecting shaft (12) which are in elastic connection;

the elastic connection has stabilizing spring (2) between fixed axle (11), connecting axle (12), and be the annular array and have the multiunit, stabilizing spring (2) and fixed axle (11) lower surface activity grafting from top to bottom.

2. The novel large spring mechanical seal as claimed in claim 1, wherein: the spring mechanical seal (1) comprises a large spring (13) which is annularly arranged between a slot (111) on the lower surface of the fixed shaft (11), the fixed shaft (11) and the connecting shaft (12) and is connected with the slot, the connecting shaft (12) is of an inward concave through structure, the lower end of the large spring (13) is connected with the concave surface of the connecting shaft (12), and the lower end of the connecting shaft (12) is rotatably connected with a rotating shaft (14).

3. The novel large spring mechanical seal as claimed in claim 1, wherein: the rubber ring (15) is arranged at the joint of the lower surface of the fixed shaft (11) and the outer wall of the connecting shaft (12), and a plurality of through holes (151) are annularly formed in the rubber ring (15).

4. A new large spring mechanical seal according to claim 3, characterized in that: the rubber ring (15) is of an outward convex structure, and each group of through holes (151) are formed in one side of the stabilizing spring (2).

5. The novel large spring mechanical seal as claimed in claim 1, wherein: stabilize spring (2) including little spring (21) that a plurality of connects between fixed axle (11) and connecting axle (12), every group little spring (21) inside all be provided with slot (111) complex inserted bar (22), and every group inserted bar (22) lower extreme all with connecting axle (12) fixed mounting.

6. The novel large spring mechanical seal according to claim 5, wherein: grooves (221) are formed in each group of the inserting rods (22) in a vertical and symmetrical mode.

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