CN213628875U

CN213628875U - A low-wear mechanical seal

Info

Publication number: CN213628875U
Application number: CN202022518316.3U
Authority: CN
Inventors: 陈金叶
Original assignee: Tianchang Jinzhu Mechanical Seal Co ltd
Current assignee: Tianchang Jinzhu Mechanical Seal Co ltd
Priority date: 2020-11-04
Filing date: 2020-11-04
Publication date: 2021-07-06
Anticipated expiration: 2030-11-04

Abstract

The utility model discloses a low-wear mechanical seal, which comprises a shaft sleeve and a moving ring seat, one end of the shaft sleeve is fixedly connected to the inside of the moving ring seat, one side of the shaft sleeve is fixedly connected with a threaded end, and the threaded end is fixedly connected to the moving ring Inside the seat, a spring is arranged inside the moving ring seat, the spring is sleeved on the outside of the shaft sleeve, a fixing piece is arranged on one side of the spring, a moving ring is fixedly connected on one side of the fixing piece, and an organic sealing cover is arranged on the outside of the moving ring seat. One end of the sealing gland is fixedly connected with a gasket, a static ring is fixed inside the mechanical sealing gland, a bearing is arranged between the dynamic ring and the static ring, and a plurality of steel balls are movably connected inside the bearing. A moving ring sealing ring is fixedly connected inside the ring, a static ring sealing ring is fixedly connected outside the static ring, and a shell sleeve is arranged outside the shaft sleeve. The low-wear mechanical seal reduces the wear of the dynamic ring and the static ring due to friction, so that the sealing components will not reduce the sealing performance due to wear, and improve the service life of the mechanical seal.

Description

Low-abrasion mechanical seal

Technical Field

The utility model relates to a mechanical seal technical field specifically is a low wear type mechanical seal.

Background

The mechanical seal is a device for preventing fluid leakage, which is formed by at least one pair of end faces perpendicular to the rotation axis, and the end faces are kept in fit and relatively slide under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism and the cooperation of an auxiliary seal.

The elastic loading mechanism and the auxiliary seal are mechanical seals of metal corrugated pipes, which are called metal corrugated pipe seals. In light sealing, a rubber corrugated pipe is used as auxiliary sealing, the elasticity of the rubber corrugated pipe is limited, and a spring is generally required to be supplemented to meet the loading elasticity. "mechanical seal" is often referred to by one as "mechanical seal" for short.

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 mechanical seal is a shaft seal device which is kept jointed by one or a plurality of pairs of end faces which slide relatively and are vertical to a shaft under the action of fluid pressure and elasticity (or magnetic force) of a compensation mechanism and matched with auxiliary seal to achieve leakage resistance. The common mechanical sealing structure is composed of a static ring (static ring), a rotating ring (moving ring), an elastic element spring seat, a set screw, an auxiliary sealing ring of the rotating ring, an auxiliary sealing ring of the static ring and other elements, and an anti-rotation pin is fixed on a gland to prevent the static ring from rotating. The rotating and stationary rings may also be sometimes referred to as compensating or non-compensating rings depending on whether they have axial compensation capability.

At present, current mechanical seal is after the installation is accomplished, and the transmission shaft motion can drive its rotating ring and rotate, because rotating ring and quiet ring laminating can produce the friction when the sealed terminal surface is in high-speed rotation, lead to wearing and tearing, reduce seal assembly leakproofness for mechanical seal's life-span reduces, therefore we make the improvement to this, provide a low wearing and tearing type mechanical seal.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model relates to a low wear type mechanical seal, including axle sleeve and rotating ring seat, axle sleeve one end fixed connection is in the inside of rotating ring seat, axle sleeve one side fixedly connected with screw thread end, screw thread end fixed connection is in the inside of rotating ring seat, the inside spring that is provided with of rotating ring seat, the spring cup joints in the outside of axle sleeve, spring one side is provided with the stationary blade, stationary blade one side fixedly connected with rotating ring.

As a preferred technical scheme of the utility model, the rotating ring seat outside is provided with the machine gland lid, machine gland lid one end fixedly connected with gasket, the inside fixed quiet ring that is provided with of machine gland lid.

As an optimal technical scheme of the utility model, be provided with the bearing between rotating ring and the quiet ring, the inside swing joint of bearing has a plurality of steel balls, the diameter of steel ball is greater than the width of bearing.

As a preferred technical scheme of the utility model, the inside fixedly connected with rotating ring sealing washer of rotating ring, quiet ring outside fixedly connected with quiet ring sealing washer.

As a preferred technical scheme of the utility model, the axle sleeve outside is provided with the shell cover, the fixed first shirt rim that is provided with in the shell cover outside, the fixed second shirt rim that is provided with in the machine gland outside.

As a preferred technical scheme of the utility model, the inside fixed pin that is provided with in first shirt rim both sides, the fixed pin runs through the second shirt rim, the outside fixedly connected with fastening nut of fixed pin one end.

As a preferred technical scheme of the utility model, the diameter of shell is the same with the diameter of gasket.

The utility model has the advantages that: this kind of low wearing and tearing type mechanical seal installs the inside at the mechanical seal gland earlier with quiet ring, with bearing fixed connection in quiet ring one side, make ball one end can contact quiet ring, then put into the rotating ring seat with the rotating ring after, put into the inside of mechanical seal gland with the rotating ring seat again, make one side contact ball of moving ring, let quiet ring and rotating ring support the ball tightly, when making the transmission shaft rotate, the rotating ring is with changeing, and drive the ball and rotate, reduce the wearing and tearing that rotating ring and quiet ring caused because of the friction, make seal assembly can not reduce the leakproofness because of wearing and tearing, improve mechanical seal's life.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is an exploded view of a low wear mechanical seal according to the present invention;

fig. 2 is a cross-sectional view of a mechanical seal gland of a low-wear mechanical seal of the present invention.

In the figure: 1. a shaft sleeve; 2. a threaded end; 3. a movable ring seat; 4. a spring; 5. a fixing sheet; 6. a moving ring sealing ring; 7. a moving ring; 8. a stationary ring seal ring; 9. a mechanical seal gland; 10. a gasket; 11. a stationary ring; 12. a shell; 13. a fixing pin; 14. a first skirt edge; 15. a second skirt; 16. fastening a nut; 17. steel balls; 18. and a bearing.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Example (b): as shown in fig. 1-2, the utility model relates to a low wear type mechanical seal, including axle sleeve 1 and rotating ring seat 3, 1 one end fixed connection of axle sleeve is in the inside of rotating ring seat 3, 1 one side fixedly connected with screw thread end 2 of axle sleeve, 2 fixed connection of screw thread end are in the inside of rotating ring seat 3, 3 inside springs 4 that are provided with of rotating ring seat, springs 4 cup joint in the outside of axle sleeve 1, spring 4 one side is provided with stationary blade 5, stationary blade 5 one side fixedly connected with rotating ring 7.

The outer side of the moving ring seat 3 is provided with a mechanical seal gland 9, one end of the mechanical seal gland 9 is fixedly connected with a gasket 10, and a stationary ring 11 is fixedly arranged inside the mechanical seal gland 9.

A bearing 18 is arranged between the movable ring 7 and the stationary ring 11, a plurality of steel balls 17 are movably connected inside the bearing 18, and the diameter of each steel ball 17 is larger than the width of the bearing 18.

The inner part of the movable ring 7 is fixedly connected with a movable ring sealing ring 6, and the outer side of the static ring 11 is fixedly connected with a static ring sealing ring 8.

The outer side of the shaft sleeve 1 is provided with a shell sleeve 12, the outer side of the shell sleeve 12 is fixedly provided with a first skirt 14, and the outer side of the mechanical seal gland 9 is fixedly provided with a second skirt 15.

Fixing pins 13 are fixedly arranged inside two sides of the first skirt edge 14, the fixing pins 13 penetrate through the second skirt edge 15, and fastening nuts 16 are fixedly connected to the outer sides of one ends of the fixing pins 13.

Wherein the diameter of the shell 12 is the same as the diameter of the gasket 10.

Finally, it should be noted that: in the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or 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 in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-wear mechanical seal, characterized in that it comprises a shaft sleeve (1) and a moving ring seat (3), one end of the shaft sleeve (1) is fixedly connected to the inside of the moving ring seat (3), and the A threaded end (2) is fixedly connected to one side of the shaft sleeve (1), the threaded end (2) is fixedly connected to the inside of the moving ring seat (3), and the inside of the moving ring seat (3) is provided with a spring (4) , the spring (4) is sleeved on the outside of the shaft sleeve (1), a fixing piece (5) is arranged on one side of the spring (4), and a moving ring (7) is fixedly connected to one side of the fixing piece (5). ).

2. A low-wear mechanical seal according to claim 1, characterized in that an organic sealing gland (9) is provided on the outer side of the moving ring seat (3), and one end of the mechanical sealing gland (9) is fixed A gasket (10) is connected, and a static ring (11) is fixedly arranged inside the machine sealing gland (9).

3. A low-wear mechanical seal according to claim 2, wherein a bearing (18) is arranged between the moving ring (7) and the static ring (11), and the bearing (18) is inside A plurality of steel balls (17) are movably connected, and the diameter of the steel balls (17) is larger than the width of the bearing (18).

4. A low-wear mechanical seal according to claim 2, characterized in that a moving ring sealing ring (6) is fixedly connected inside the moving ring (7), and a moving ring sealing ring (6) is fixedly connected outside the static ring (11). There is a static ring seal (8).

5 . The low-wear mechanical seal according to claim 2 , wherein a casing ( 12 ) is arranged on the outer side of the shaft sleeve ( 1 ), and a first casing ( 12 ) is fixedly arranged on the outer side. A skirt (14), a second skirt (15) is fixedly arranged on the outside of the machine sealing gland (9).

6 . The low-wear mechanical seal according to claim 5 , wherein a fixing pin ( 13 ) is fixedly arranged on both sides of the first skirt ( 14 ), and the fixing pin ( 13 ) penetrates through 6 . For the second skirt (15), a fastening nut (16) is fixedly connected to the outer side of one end of the fixing pin (13).

7 . The low-wear mechanical seal according to claim 5 , wherein the diameter of the casing ( 12 ) is the same as the diameter of the gasket ( 10 ). 8 .