CN218992347U

CN218992347U - Mechanical sealing device

Info

Publication number: CN218992347U
Application number: CN202223328903.1U
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 mechanical sealing device, which comprises a stationary ring and a movable ring, wherein the stationary ring is fixedly arranged in a sealing gland, a water injection groove is formed in the sealing gland, a cleaning liquid is injected into the device through the water injection groove, a flow guiding device is fixedly arranged on the sealing gland, the flow guiding device is positioned at the sealing end face of the stationary ring and the movable ring, the flow guiding device is provided with a flow guiding groove, the water injection groove is communicated with the flow guiding groove, the flow guiding groove is used for guiding the cleaning liquid in the device, the sealing gland is provided with the water injection groove, the sealing gland is fixedly provided with the flow guiding device, the flow guiding device is provided with the flow guiding groove, when the cleaning liquid is injected into the device from the water injection opening, the flow guiding groove is formed at the sealing end face in a circular flow shape due to the fact that the flow guiding groove is formed around the movable ring when the movable ring rotates, and the sealing end face is completely flushed, and the cooling and lubricating effects of mechanical sealing are ensured.

Description

Mechanical sealing device

Technical Field

The utility model relates to the field of mechanical sealing, in particular to a mechanical sealing device.

Background

The single-end face mechanical seal is a mechanical seal composed of a pair of sealing end faces, and has the characteristics of simple sealing structure and easiness in manufacturing and installation. The mechanical seal is generally used for the conditions that the lubricity of a medium is good and micro leakage is allowed, is the most commonly used mechanical seal type, is sleeved on a movable ring piece and a static ring piece through a circular seal ring when the mechanical seal is used, so that a gap between a rotating shaft and a machine body is sealed, the circular seal ring is easy to be rolled, the damage of the circular seal ring is caused, the sealing performance is poor, a large amount of heat is generated on a sealing end face due to relative rotation when the mechanical seal is used, the sealing end face can be damaged, the existing treatment mode mainly comprises the steps of arranging a water inlet and a water outlet on a gland, flushing the sealing end face through a cleaning liquid, and incomplete flushing of the sealing end face is caused due to the fact that the cleaning liquid does not continuously clean the sealing end face, so that the service life of the mechanical seal is influenced.

It should be noted that, the applicant has applied for a base shaft type packaging mechanical seal device with publication number CN202251953U before, a first positioning piece for preventing the relative rotation of the moving ring and the shaft sleeve is provided between the moving ring and the shaft sleeve, a second positioning piece for preventing the relative rotation of the moving ring and the sealing gland is provided between the stationary ring and the sealing gland, the moving ring is pressed on the elastic shaft sleeve by the stationary ring, the sealing performance of the base shaft type packaging mechanical seal is ensured, although the above patent solves the problems that the mechanical seal cannot ensure concentricity with the shaft, the frequent displacement of the spring and the rubber ring affects the sealing effect when the shaft rotates, but the problem that the cleaning liquid is not washed continuously and the flushing of the sealing end face is incomplete is not solved.

Disclosure of Invention

The utility model is an optimization performed on the basis of the application, and provides a mechanical sealing device which comprises a stationary ring and a movable ring, wherein the stationary ring is fixedly arranged in a sealing gland, a water injection groove is formed in the sealing gland, cleaning liquid can be injected into the device through the water injection groove, a flow guiding device is fixedly arranged on the sealing gland and is positioned at the sealing end face of the stationary ring and the sealing end face of the movable ring, the flow guiding device is provided with a flow guiding groove, the water injection groove is communicated with the flow guiding groove, and the flow guiding groove can guide the cleaning liquid in the device.

Preferably: the movable ring is in clearance fit with the static ring, and one side of the static ring, which is far away from the movable ring, is connected with a compensation device.

Preferably: the compensation device comprises a fixed ring, wherein the fixed ring is fixedly connected with a baffle ring through a spring, and the baffle ring is attached to the stationary ring.

Preferably: the static ring and the dynamic ring are sleeved on the shaft sleeve, and a first sealing ring is arranged on the inner wall of the shaft sleeve.

Preferably: the side wall of the shaft sleeve is provided with a notch, and one end of the shaft sleeve, which is far away from the first sealing ring, is provided with a fixing hole.

Preferably: and one end of the fixing hole is provided with a locking ring, the locking ring is fixedly connected with the fixing hole through bolts, and the locking ring is fixedly connected with the sealing gland.

Preferably: a plurality of shackles are arranged between the sealing gland and the lock ring.

Preferably: the movable ring is provided with a first groove, a second sealing ring is arranged in the first groove, and the cross section length of the second sealing ring is smaller than that of the first groove.

Preferably: the sealing gland and the stationary ring contact surface are provided with a second groove, a third sealing ring is arranged in the second groove, and the cross section length of the third sealing ring is smaller than that of the second groove.

Preferably: the flow guiding device is provided with a third groove, the third groove is positioned between the flow guiding device and the sealing gland, and a fourth sealing ring is arranged in the third groove.

The utility model has the technical effects and advantages that:

through seting up the water injection groove on sealing pressure cover to fixed mounting guiding device is covered in sealing pressure, and guiding device has seted up guiding gutter, and water injection groove and guiding gutter intercommunication, and guiding device sets up in quiet ring and moving ring seal face department, and the washing liquid that pours into the device from the water injection mouth can flow guide through the guiding gutter in, because the guiding gutter is offered around the moving ring when the moving ring is rotatory, consequently the washing liquid can form the annular in seal face department, washes totally to seal face, guarantees mechanical seal's cooling and lubricated effect.

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 side view of a mechanical seal provided in an embodiment of the present application;

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

FIG. 4 is a schematic structural view of a compensation device for a mechanical seal device according to an embodiment of the present disclosure;

fig. 5 is a schematic diagram of the structure of the portion a in fig. 3.

In the figure:

1. stationary ring, 2, moving ring, 3, gland, 4, guiding device, 5, compensation device, 6, axle sleeve, 7, catch, 201, first recess, 202, second sealing washer, 301, water injection groove, 302, second recess, 303, third sealing washer, 401, guiding groove, 402, third recess, 403, fourth sealing washer, 501, fixed ring, 502, spring, 503, baffle ring, 601, first sealing washer, 602, fixed hole, 701, shaft fixer.

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.

Examples

As shown in fig. 1-3, in this embodiment, a mechanical sealing device is provided, including a stationary ring 1 and a moving ring 2, the stationary ring 1 and the moving ring 2 are in clearance fit, the stationary ring 1 is fixedly installed in the sealing gland 3, the sealing gland 3 is fixedly installed with a flow guiding device 4 through bolts, the flow guiding device 4 is located at the sealing end surfaces of the stationary ring 1 and the moving ring 2, a water injection groove 301 is formed on the sealing gland 3, the water injection groove 301 is communicated with a flow guiding groove 401 formed inside the flow guiding device 4, when the sealing end surfaces need to be flushed and lubricated, cleaning liquid only needs to be injected from the water injection groove 301, the cleaning liquid flows into the flow guiding groove 401 along with the water injection groove 301, when the moving ring 2 starts to rotate along with the shaft, because the flow guiding groove 401 is formed around the moving ring 2, the flow guiding groove 401 forms a circulation on the sealing end surfaces along with the rotation of the moving ring 2, thereby achieving complete flushing of the sealing end surfaces, guaranteeing the cooling and lubricating effects of mechanical sealing, and prolonging the service life of the mechanical sealing device to a certain extent.

In this embodiment, as shown in fig. 4, a compensation device 5 is connected to one side of the stationary ring 1 far away from the moving ring 2, the compensation device 5 includes a fixed ring 501, the fixed ring 501 is connected with a stop ring 503 through a spring 502, the initial state of the spring 502 is a compressed state, when the moving ring 2 and the stationary ring 1 wear due to the elastic force of the spring 502, the stop ring 503 can be pushed by the spring 502 to squeeze the stationary ring 1 to compensate the sealing end surfaces of the stationary ring 1 and the moving ring 2, the stationary ring 1 and the moving ring 2 are both sleeved on a shaft sleeve 6, one end of the shaft sleeve 6 far away from the locking ring 7 is provided with a groove structure, the moving ring 2 is clamped in the groove, a notch is formed in the side wall of the shaft sleeve 6, and the shaft sleeve 6 is made of an elastic material, therefore, the shaft sleeve 6 has a certain expansion and contraction property, a first sealing ring 601 is mounted on the inner wall of the shaft sleeve 6, one end of the shaft sleeve 6 is provided with a fixing hole 602, the locking ring 7 is fixedly connected through the fixing hole 602, the complete fit between the shaft sleeve 6 and the shaft sealing gland 3 and the shaft fixing device between the locking ring 7 is combined, the sealing gland 3 and the shaft fixing device is ensured to ensure the sealing end surface is perpendicular to the shaft of the installation equipment and the shaft and the sealing device and the sealing force of the shaft is uniform, and the whole sealing device can also ensure concentric and the concentric shaft sealing device is kept in the concentric in the axial direction.

As shown in fig. 5, in this embodiment, the first groove 201 is formed on the moving ring 2, the second seal ring 202 is installed in the first groove 201, the cross-sectional length of the second seal ring 202 is smaller than that of the first groove 201, the contact surface of the seal gland 3 and the static ring 1 is formed with the second groove 302, the third seal ring 303 is installed in the second groove 302, the cross-sectional length of the third seal ring 303 is smaller than that of the second groove 302, the design can enable the moving ring 2 to always make the second seal ring 202 closely adhere to the first groove 201 regardless of fluctuation of system pressure, and not fluctuate along with fluctuation of system pressure, so that stability is better, even if the system pressure is from positive pressure to negative pressure, the resultant force direction of the moving ring 1 is consistent with that of the system in the positive pressure state, so that the utility model can also be used in the negative pressure state of the system, the third groove 402 is formed on the guide device 4, the third groove 402 is located between the guide device 4 and the seal gland 3, and the fourth seal ring 403 is installed in the third groove 402, and the cleaning liquid can avoid leakage from the guide device 4 to the seal gland 3.

The working principle of the utility model is as follows:

the sealing gland is provided with a static ring and a moving ring, the static ring is fixedly arranged in the sealing gland, a guide device is fixedly arranged on the sealing gland through bolts, the guide device is positioned at the sealing end face of the static ring and the moving ring, a water injection groove is formed in the sealing gland, the water injection groove is communicated with the guide groove formed in the guide device, when the sealing end face is required to be washed and lubricated, cleaning liquid only needs to be injected from the water injection groove, the cleaning liquid flows into the guide groove along with the water injection groove, when the moving ring starts to rotate along with a shaft, because the guide groove is formed around the moving ring, the cleaning liquid in the guide groove forms a circulation on the sealing end face along with the rotation of the moving ring, thereby achieving the effect of completely flushing the sealing end face, guaranteeing the cooling and lubricating effects of the mechanical seal, prolonging the service life of the mechanical seal device to a certain extent, and being connected with a compensation device on one side of the moving ring away from the moving ring, the compensation device comprises a fixed ring, and the fixed ring is connected with a stop ring through a spring, and the spring is in a compressed state.

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 mechanical sealing device comprises a stationary ring (1) and a movable ring (2), and is characterized in that the stationary ring (1) is fixedly arranged in a sealing gland (3), a water injection groove (301) is formed in the sealing gland (3), and cleaning liquid is injected into the device through the water injection groove (301);

a guide device (4) is fixedly arranged on the sealing gland (3), and the guide device (4) is positioned at the sealing end surface of the stationary ring (1) and the movable ring (2);

the flow guiding device (4) is provided with a flow guiding groove (401), the water injection groove (301) is communicated with the flow guiding groove (401), and the flow guiding groove (401) is used for guiding the cleaning fluid in the device.

2. A mechanical seal according to claim 1, characterized in that the moving ring (2) is in clearance fit with the stationary ring (1), and that the side of the stationary ring (1) remote from the moving ring (2) is connected with a compensating device (5).

3. A mechanical seal according to claim 2, wherein the compensating device (5) comprises a fixed ring (501), the fixed ring (501) is fixedly connected with a baffle ring (503) by a spring (502), and the baffle ring (503) is attached to the stationary ring (1).

4. A mechanical sealing device according to claim 2, characterized in that the stationary ring (1) and the moving ring (2) are sleeved on a shaft sleeve (6), and a first sealing ring (601) is mounted on the inner wall of the shaft sleeve (6).

5. The mechanical sealing device according to claim 4, wherein a notch is formed in a side wall of the shaft sleeve (6), and a fixing hole (602) is formed in an end of the shaft sleeve (6) away from the first sealing ring (601).

6. A mechanical seal according to claim 5, characterized in that a locking ring (7) is mounted at one end of the fixing hole (602), the locking ring (7) is fastened to the fixing hole (602) by a bolt, and the locking ring (7) is fixedly connected to the sealing gland (3).

7. A mechanical seal according to claim 6, characterized in that a number of shaft retainers (701) are provided between the gland (3) and the locking ring (7).

8. The mechanical sealing device according to claim 4, wherein the moving ring (2) is provided with a first groove (201), a second sealing ring (202) is installed in the first groove (201), and the cross section length of the second sealing ring (202) is smaller than that of the first groove (201).

9. The mechanical sealing device according to claim 7, wherein a second groove (302) is formed in a contact surface of the sealing gland (3) and the stationary ring (1), a third sealing ring (303) is installed in the second groove (302), and the cross section length of the third sealing ring (303) is smaller than that of the second groove (302).

10. A mechanical sealing device according to claim 2, wherein the flow guiding device (4) is provided with a third groove (402), the third groove (402) is located between the flow guiding device (4) and the sealing gland (3), and a fourth sealing ring (403) is installed in the third groove (402).