CN218992346U

CN218992346U - Double-end-face packaging mechanical sealing device

Info

Publication number: CN218992346U
Application number: CN202223328885.7U
Authority: CN
Inventors: 舒恺君
Original assignee: Guangzhou Saddle Electromechanical Equipment Engineering Co ltd
Current assignee: Guangzhou Saddle Electromechanical Equipment Engineering Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-05-09
Anticipated expiration: 2032-12-09

Abstract

The utility model discloses a double-end-face packaging mechanical sealing device which comprises a first-stage sealing device and a second-stage sealing device, wherein the first-stage sealing device is sleeved on a first shaft sleeve, the second-stage sealing device is sleeved on a second shaft sleeve, the first shaft sleeve and the second shaft sleeve are fixedly connected through a connecting piece, the first shaft sleeve and the second shaft sleeve can synchronously rotate, the first-stage sealing device is sleeved on the first shaft sleeve, the second-stage sealing device is sleeved on the second shaft sleeve, the first shaft sleeve and the second shaft sleeve are fixedly connected through the connecting piece, the first shaft sleeve and the second shaft sleeve can synchronously rotate, and when one shaft sleeve is damaged, only the damaged shaft sleeve is required to be replaced, the whole shaft sleeve is not required to be replaced, and the cost is saved.

Description

Double-end-face packaging mechanical sealing device

Technical Field

The utility model relates to the field of mechanical sealing, in particular to a double-end-face packaging mechanical sealing device.

Background

The principle of the double-end-face mechanical seal is basically the same as that of the single-end-face mechanical seal, and the double-end-face mechanical seal is a device for preventing fluid leakage, which is formed by keeping the joint and relative sliding of the end faces perpendicular to the rotation axis under the action of fluid pressure and the elastic force of a compensation mechanism and the cooperation of an auxiliary seal.

When the double-end-face mechanical sealing structure works, under the action of resultant force caused by fluid pressure, elastic force of an elastic element and the like, a proper specific pressure is generated on the end face of the sealing ring, so that the two contact end faces are tightly attached to each other, and an extremely thin liquid film is maintained in an extremely small gap between the two end faces, thereby achieving the purpose of sealing.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a double-end-face packaging mechanical sealing device which comprises a primary sealing device and a secondary sealing device, wherein the primary sealing device is sleeved on a first shaft sleeve, the secondary sealing device is sleeved on a second shaft sleeve, the first shaft sleeve and the second shaft sleeve are fixedly connected through a connecting piece, and the first shaft sleeve and the second shaft sleeve can synchronously rotate.

Preferably: the first sealing ring is installed at the joint of the first shaft sleeve and the second shaft sleeve, and the second sealing ring is installed at one end, far away from the second shaft sleeve, of the first shaft sleeve.

Preferably: the primary sealing device is sleeved with a first sealing gland, the secondary sealing device is sleeved with a second sealing gland, and the first sealing gland is fixedly connected with the second sealing gland.

Preferably: the first sealing gland is fixedly connected with the second sealing gland through bolts, and a third sealing ring is installed at the joint.

Preferably: the primary sealing device comprises a first movable ring and a first static ring, the secondary sealing device comprises a second movable ring and a second static ring, and compensation mechanisms are arranged on one sides of the first static ring and the second static ring.

Preferably: the gasket is sleeved on the first static ring, a fourth sealing ring is arranged on the contact surface of the gasket and the first static ring, a fifth sealing ring is arranged on the contact surface of the gasket and the first sealing gland, and a sixth sealing ring is arranged on the contact surface of the second sealing gland and the second static ring.

Preferably: the first shaft sleeve and one end of the second shaft sleeve are respectively provided with a ring groove, and the first moving ring and the second moving ring are respectively clamped and fixed in the ring grooves of the first shaft sleeve and the second shaft sleeve.

Preferably: the compensation mechanism comprises a fixed ring, the fixed ring is fixedly connected with a push ring through a spring, and the push ring is attached to the first static ring and the second static ring.

Preferably: and a seventh sealing ring and an eighth sealing ring are respectively arranged on the contact surfaces of the annular groove and the first moving ring and the second moving ring.

Preferably: the second shaft sleeve is provided with a locking ring at one end far away from the first shaft sleeve, and a plurality of shaft fixing devices are arranged between the locking ring and the second sealing gland.

The utility model has the technical effects and advantages that:

the primary sealing device is sleeved on the first shaft sleeve, the secondary sealing device is sleeved on the second shaft sleeve, the first shaft sleeve and the second shaft sleeve are fixedly connected through the connecting piece, the first shaft sleeve and the second shaft sleeve can synchronously rotate, and when one shaft sleeve is damaged, only the damaged shaft sleeve is required to be replaced, the whole shaft sleeve is not required to be replaced, and the cost is saved.

Drawings

FIG. 1 is a schematic structural view of a mechanical seal device provided in an embodiment of the present application;

FIG. 2 is a schematic structural view of a shaft sleeve of a mechanical seal device according to an embodiment of the present application;

FIG. 3 is a cross-sectional view of a sleeve of a mechanical seal provided in an embodiment of the present application;

FIG. 4 is a front view of a mechanical seal provided by an embodiment of the present application;

FIG. 5 is a cross-sectional view of a mechanical seal provided by an embodiment of the present application;

FIG. 6 is a schematic structural view of a compensating mechanism in a mechanical seal device according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural view of a first sealing device in the mechanical sealing device according to the embodiment of the present application;

FIG. 8 is a schematic structural view of a second sealing device in the mechanical sealing device according to the embodiment of the present application;

fig. 9 is a side view of a mechanical seal provided in an embodiment of the present application.

In the figure:

1. a primary sealing device 2, a secondary sealing device 3, a first shaft sleeve 4, a second shaft sleeve 5, a first sealing gland 6, a second sealing gland 7, a compensating mechanism 8, a gasket 9, a locking ring 101, a first movable ring 102, a first static ring 201, a second movable ring 202 and a second static ring, 301, ring groove, 701, fixed ring, 702, spring, 703, push ring, 801, shaft fixer, 10, first sealing ring, 11, second sealing ring, 12, third sealing ring, 13, fourth sealing ring, 14, fifth sealing ring, 15, sixth sealing ring, 16, seventh sealing ring, 17, eighth sealing ring.

Detailed Description

The utility model will be described in further detail with reference to the drawings and the detailed description. The embodiments of the utility model have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in the specific direction, and thus should not be construed as limiting the present utility model; the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally coupled, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Example 1

As shown in fig. 1-4, in this embodiment, a two-end-face packaging mechanical sealing device is provided, which comprises a primary sealing device 1 and a secondary sealing device 2, the primary sealing device 1 is sleeved on a first shaft sleeve 3, the secondary sealing device 2 is sleeved on a second shaft sleeve 4, the first shaft sleeve 3 and the second shaft sleeve 4 are fixedly connected through a connecting piece, the inner walls of the connected first shaft sleeve 3 and second shaft sleeve 4 are connected naturally, a first sealing ring 10 is installed at the connection position of the first shaft sleeve 3 and the second shaft sleeve 4, a locking ring 9 is fixedly installed at one end of the second shaft sleeve 4 far from the first shaft sleeve 3, the installation accuracy can be conveniently ensured by respectively arranging the first shaft sleeve 3 and the second shaft sleeve 4, on the one hand, on the other hand, both sealing devices can be effectively prevented from being invalid, and notches are formed on the first shaft sleeve 3 and the second shaft sleeve 4, the sleeve has certain expansibility and contractibility, the second sleeve 4 is ensured to be sleeved on the equipment shaft and can be completely attached to the shaft by fastening the lock ring 9 at one end of the second sleeve 4, the second seal ring 11 arranged on the inner wall of the first sleeve 3 is matched for positioning, the concentricity of the first sleeve 3 and the second sleeve 4 and the equipment shaft is ensured, then the shaft fixing device 801 between the lock ring 9 and the second seal gland 6 is combined, the verticality of the first seal gland 5 and the second seal gland 6 and the equipment shaft during installation is ensured, the compensation force of the spring 702 is uniform, and simultaneously, all concentric circle parts of the whole mechanical seal are ensured to be concentric with the equipment shaft during the installation process of the mechanical seal, thereby ensuring the concentricity of the whole mechanical seal and the equipment shaft, ensuring the sealing end face to be perpendicular to the equipment shaft, avoiding the axial runout of the sealing end face, and when one of the sleeves is damaged, only the damaged sleeve is required to be replaced, the whole shaft sleeve does not need to be replaced, and the cost is saved.

In the embodiment, as shown in fig. 5-9, a first sealing gland 5 is sleeved outside a first sealing device, a second sealing gland 6 is sleeved outside a second sealing device, the first sealing gland 5 and the second sealing gland 6 are fixedly connected through bolts, a third sealing ring 12 is installed at the joint, the first sealing device comprises a first movable ring 101 and a second stationary ring 202, the second sealing device comprises a second movable ring 201 and a second stationary ring 202, annular grooves 301 are respectively arranged at one ends of a first shaft sleeve 3 and a second shaft sleeve 4, the annular grooves 301 are respectively matched with the first movable ring 101 and the second movable ring 201, the first movable ring 101 and the second movable ring 201 are respectively clamped and fixed in the annular grooves 301, a seventh sealing ring 16 and an eighth sealing ring 17 are respectively installed on contact surfaces of the annular grooves 301 and the first movable ring 101 and the second movable ring 201, the shaft sleeve can drive the movable ring to rotate, the compensating mechanism 7 is arranged on one side of the first static ring 102 and one side of the second static ring 202, the compensating mechanism 7 comprises a fixed ring 701, the fixed ring 701 is fixedly connected with a push ring 703 through a spring 702, the push ring 703 is attached to the first static ring 102 and the second static ring 202, the spring 702 is in a compressed state in a normal state, when gaps are generated by friction between the static ring and the movable ring, the spring 702 pushes the push ring 703, the push ring 703 extrudes the static ring to compensate abrasion, the service life of equipment is effectively prolonged, a gasket 8 is sleeved on the first static ring 102, a fourth sealing ring 13 is arranged on the contact surface of the gasket 8 and the first static ring 102, a fifth sealing ring 14 is arranged on the contact surface of the first sealing gland 5, a sixth sealing ring 15 is arranged on the contact surface of the second sealing gland 6 and the second static ring 202, and the sealing performance of the device is further improved by adopting a plurality of sealing rings.

The working principle of the utility model is as follows:

be equipped with one-level sealing device and second grade sealing device, one-level sealing device cup joints on first axle sleeve, second grade sealing device cup joints on the second axle sleeve, through connecting piece fixed connection between first axle sleeve and the second axle sleeve, install first sealing washer in the junction of first axle sleeve and second axle sleeve, the second axle sleeve is keeping away from the one end fixed mounting of first axle sleeve and has the catch, can conveniently guarantee the installation accuracy through setting up first axle sleeve and second axle sleeve respectively on the one hand, on the other hand can effectively avoid two sealing device to all inefficacy, and when one of them axle sleeve takes place to damage, only need change damage axle sleeve, need not change the axle sleeve is whole, the cost is saved.

It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art and which are included in the embodiments of the present utility model without the inventive step, are intended to be within the scope of the present utility model. Structures, devices and methods of operation not specifically described and illustrated herein, unless otherwise indicated and limited, are implemented according to conventional means in the art.

Claims

1. The double-end-face packaging mechanical sealing device comprises a primary sealing device (1) and a secondary sealing device (2), and is characterized in that the primary sealing device (1) is sleeved on a first shaft sleeve (3), and the secondary sealing device (2) is sleeved on a second shaft sleeve (4);

the first shaft sleeve (3) is fixedly connected with the second shaft sleeve (4) through a connecting piece, and the first shaft sleeve (3) and the second shaft sleeve (4) can synchronously rotate.

2. The double-end-face packaging mechanical sealing device according to claim 1, wherein a first sealing ring (10) is arranged at the joint of the first shaft sleeve (3) and the second shaft sleeve (4), and a second sealing ring (11) is arranged at one end of the first shaft sleeve (3) far away from the second shaft sleeve (4).

3. The double-end-face packaging mechanical sealing device according to claim 2, wherein the primary sealing device (1) is sleeved with a first sealing gland (5), the secondary sealing device (2) is sleeved with a second sealing gland (6), and the first sealing gland (5) and the second sealing gland (6) are fixedly connected.

4. A two-sided packaging mechanical seal according to claim 3, characterized in that the first sealing gland (5) and the second sealing gland (6) are fixedly connected by means of bolts, and a third sealing ring (12) is mounted at the connection.

5. The double-end-face packaging mechanical sealing device according to claim 4, wherein the primary sealing device (1) comprises a first movable ring (101) and a first static ring (102), the secondary sealing device (2) comprises a second movable ring (201) and a second static ring (202), and compensation mechanisms (7) are arranged on one sides of the first static ring (102) and the second static ring (202).

6. The double-end-face packaging mechanical sealing device according to claim 5, wherein a gasket (8) is sleeved on the first stationary ring (102), a fourth sealing ring (13) is arranged on the contact surface of the gasket (8) and the first stationary ring (102), a fifth sealing ring (14) is arranged on the contact surface of the gasket (8) and the first sealing gland (5), and a sixth sealing ring (15) is arranged on the contact surface of the second sealing gland (6) and the second stationary ring (202).

7. The double-end-face packaging mechanical sealing device according to claim 5, wherein annular grooves (301) are formed in one ends of the first shaft sleeve (3) and the second shaft sleeve (4), and the first moving ring (101) and the second moving ring (201) are respectively clamped and fixed in the annular grooves (301) of the first shaft sleeve (3) and the second shaft sleeve (4).

8. The double-end-face packaging mechanical sealing device according to claim 5, wherein the compensation mechanism (7) comprises a fixed ring (701), the fixed ring (701) is fixedly connected with a push ring (703) through a spring (702), and the push ring (703) is attached to the first stationary ring (102) and the second stationary ring (202).

9. The mechanical sealing device for double-end-face packaging according to claim 7, wherein a seventh sealing ring (16) and an eighth sealing ring (17) are respectively arranged on the contact surfaces of the annular groove (301) with the first moving ring (101) and the second moving ring (201).

10. The double-end-face packaging mechanical sealing device according to claim 7, wherein a locking ring (9) is fixedly arranged at one end of the second shaft sleeve (4) away from the first shaft sleeve (3), and a plurality of shaft fixing devices (801) are arranged between the locking ring (9) and the second sealing gland (6).