CN216812172U

CN216812172U - Mechanical sealing device for slurry pump

Info

Publication number: CN216812172U
Application number: CN202220414515.6U
Authority: CN
Inventors: 刘博�
Original assignee: Hebei Shigong Pump Indusry Co ltd
Current assignee: Hebei Shigong Pump Indusry Co ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-06-24
Anticipated expiration: 2032-02-28

Abstract

The utility model discloses a mechanical sealing device for a slurry pump, which comprises a rotating shaft and a slurry pump end cover, wherein a static sealing ring is fixedly arranged on the outer surface of the slurry pump end cover close to the rotating shaft, a movable sealing ring is sleeved on the outer surface of the rotating shaft and abuts against the side wall of the static sealing ring, and an abutting mechanism is arranged on the outer surface of the rotating shaft. According to the centrifugal sealing device, the rotating shaft drives the lantern ring to rotate, so that the fixed pipe fixedly arranged on the outer surface of the lantern ring drives the moving rod to rotate, the centrifugal ball fixedly arranged at one end of the moving rod is outwards expanded by centrifugal force, the centrifugal ball pushes the sliding sleeve towards the direction of the static sealing ring along the inner wall of the conical cavity, the sliding sleeve can push the movable sealing ring to tightly abut against the static sealing ring, the sealing effect can be further enhanced, and leakage is avoided.

Description

Mechanical sealing device for slurry pump

Technical Field

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

Background

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 the shaft under the action of fluid pressure and the elastic force of a compensation mechanism and matched with auxiliary seal to prevent leakage. The slurry pump is a kind of centrifugal pump, and refers to a kind of machinery which increases the energy of solid-liquid mixed medium by means of centrifugal force produced by the rotation of pump impeller, and converts the electric energy into kinetic energy and potential energy of medium.

In order to prevent the medium from leaking through a gap between the pump shaft and the pump shell, mechanical sealing is needed for blocking, the traditional slurry pump mechanical seal is usually sealed by a plurality of sealing rings, and when the slurry pump mechanical seal is used, a gap is generated between the plurality of sealing rings due to vibration of a slurry pump, so that the medium is easily leaked.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art, and provides a mechanical sealing device for a slurry pump.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a mechanical seal device for slurry pump, includes pivot and slurry pump end cover, the surface fixed mounting that the slurry pump end cover is close to the pivot has static sealing ring, the surface cover of pivot is equipped with moves the sealing ring, the lateral wall that moves sealing ring and static sealing ring offsets, the surface of pivot is equipped with supports tight mechanism.

As a further scheme of the utility model, the abutting mechanism comprises a sliding sleeve which is slidably mounted on the rotating shaft, a conical cavity is formed in the inner wall of the sliding sleeve, which is far away from the movable sealing ring, a lantern ring is slidably mounted on the outer surface of the rotating shaft, which is positioned in the conical cavity, and a pushing mechanism is arranged on the outer surface of the lantern ring.

As a further scheme of the present invention, the pushing mechanism includes a plurality of fixed tubes uniformly and fixedly mounted on the outer surface of the collar at the circumference, a moving rod is inserted in the fixed tubes, a retainer ring is fixedly mounted at one end of the moving rod close to the collar, a centrifugal ball is fixedly mounted at the other end of the moving rod, a compression spring is sleeved on the outer surface of the moving rod, and the compression spring is disposed between the retainer ring and the top wall of the fixed tube.

As a further scheme of the utility model, a limiting block is fixedly arranged in the sleeve ring, and a limiting groove matched with the limiting block is formed in the outer surface of the rotating shaft.

As a further scheme of the utility model, the inner wall of the sliding sleeve is fixedly provided with a connecting pipe, and the connecting pipe is fixedly arranged with the outer surface of the lantern ring.

As a further scheme of the utility model, a limit ring is fixedly installed on the outer surface of the rotating shaft away from the static sealing ring, a resisting spring is sleeved on the outer surface of the rotating shaft, and the resisting spring is arranged between the limit ring and the end face of the sliding sleeve.

As a further scheme of the utility model, an annular protection plate is fixedly arranged on the end face of one end, close to the movable sealing ring, of the sliding sleeve, and lubricating grease is filled in the annular protection plate.

The utility model has the beneficial effects that:

1. through set up between spacing ring and sliding sleeve and support tight spring for the thrust that supports tight spring can promote the sliding sleeve and support tightly and move the sealing ring, makes movable sealing ring and static sealing ring seal the clearance between countershaft and the sediment stuff pump end cover, prevents that the liquid in the sediment stuff pump from taking place to reveal.

2. The lantern ring is driven to rotate when the rotating shaft rotates, the moving rod is driven to rotate by the fixing tube fixedly installed on the outer surface of the lantern ring, the centrifugal ball fixedly installed at one end of the moving rod is outwards expanded by centrifugal force, the centrifugal ball pushes the sliding sleeve to the direction of the static sealing ring along the inner wall of the conical cavity, the sliding sleeve can push the dynamic sealing ring to abut against the static sealing ring, the sealing effect can be further enhanced, and leakage is avoided.

3. Set up the annular protection board through the one end that is close to at the sliding sleeve and moves the sealing ring to at the inside packing lubricating grease of annular protection board, make lubricating grease can keep the lubricated effect between quiet sealing ring and the dynamic seal ring constantly, reduce the friction between quiet sealing ring and the dynamic seal ring, lubricating grease also can play sealed effect simultaneously.

Drawings

FIG. 1 is a schematic structural diagram of a mechanical sealing device for a slurry pump according to the present invention;

fig. 2 is a schematic cross-sectional structural view of a mechanical sealing device for a slurry pump according to the present invention;

fig. 3 is a partial structural schematic diagram of a collar of a mechanical sealing device for a slurry pump according to the present invention;

fig. 4 is a schematic cross-sectional structural diagram of an annular protection plate of the mechanical sealing device for the slurry pump, which is provided by the utility model.

In the figure: 1. a rotating shaft; 2. a slurry pump end cover; 3. a static sealing ring; 4. a movable sealing ring; 5. a sliding sleeve; 6. a tapered cavity; 7. a collar; 8. a fixed tube; 9. a travel bar; 10. a retainer ring; 11. a centrifugal ball; 12. a compression spring; 13. a limiting block; 14. a limiting groove; 15. a connecting pipe; 16. a limiting ring; 17. the spring is tightly propped; 18. and (4) an annular protection plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example 1

Referring to fig. 1-3, a mechanical sealing device for slurry pump, includes a rotating shaft 1 and a slurry pump end cover 2, a static sealing ring 3 is fixedly installed on the outer surface of the slurry pump end cover 2 close to the rotating shaft 1, a dynamic sealing ring 4 is sleeved on the outer surface of the rotating shaft 1, the dynamic sealing ring 4 is abutted against the side wall of the static sealing ring 3, and an abutting mechanism is arranged on the outer surface of the rotating shaft 1.

In this embodiment, support tight mechanism and include slidable mounting in the epaxial sliding sleeve 5 of pivot 1, sliding sleeve 5 keeps away from the inner wall that moves sealing ring 4 and has seted up toper chamber 6, and pivot 1 is located the inside surface slidable mounting in toper chamber 6 and has lantern ring 7, and the surface of lantern ring 7 is equipped with pushing mechanism.

In this embodiment, pushing mechanism includes that the even fixed mounting of circumference is in many fixed tubes 8 of lantern ring 7 surface, and fixed tube 8's inside is inserted and is equipped with carriage release lever 9, and carriage release lever 9 is close to the one end fixed mounting of lantern ring 7 has retaining ring 10, and the other end fixed mounting of carriage release lever 9 has centrifugal ball 11, and the surface cover of carriage release lever 9 is equipped with compression spring 12, and compression spring 12 sets up between the roof of retaining ring 10 and fixed tube 8.

In this embodiment, the inside fixed mounting of the lantern ring 7 has a stopper 13, and the outer surface of the rotating shaft 1 is provided with a stopper groove 14 matched with the stopper 13.

In this embodiment, the inner wall of the sliding sleeve 5 is fixedly provided with a connecting pipe 15, and the connecting pipe 15 is fixedly arranged on the outer surface of the lantern ring 7.

In this embodiment, a limiting ring 16 is fixedly installed on the outer surface of the rotating shaft 1 far away from the static sealing ring 3, a resisting spring 17 is sleeved on the outer surface of the rotating shaft 1, and the resisting spring 17 is arranged between the limiting ring 16 and the end surface of the sliding sleeve 5.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the abutting spring 17 is arranged between the limiting ring 16 and the sliding sleeve 5, so that the thrust of the abutting spring 17 can push the sliding sleeve 5 to abut against the movable sealing ring 4, the movable sealing ring 4 and the static sealing ring 3 seal a gap between the rotating shaft 1 and the end cover 2 of the slurry pump, and liquid in the slurry pump is prevented from leaking; when the pivot 1 rotates, because the inner wall fixed mounting of the lantern ring 7 has stopper 13, and stopper 13 and the 14 slidable mounting of spacing groove who sets up on the pivot 1, make pivot 1 can drive lantern ring 7 through stopper 13 and rotate, when lantern ring 7 rotates, fixed mounting will drive the carriage release lever 9 rotation in the fixed tube 8 of lantern ring 7 surface, make the centrifugal ball 11 of fixed mounting in carriage release lever 9 one end receive centrifugal force to outwards expand, make centrifugal ball 11 promote sliding sleeve 5 to the direction of static seal ring 3 along the inner wall of bell chamber 6, make sliding sleeve 5 can promote and move sealing ring 4 and support tight static seal ring 3, the sealed effect of enhancement that can step forward, avoid taking place to reveal.

Example 2

Referring to fig. 4, a mechanical seal device for slurry pump, including pivot 1 and slurry pump end cover 2, the fixed surface that slurry pump end cover 2 is close to pivot 1 installs static sealing ring 3, and the surface cover of pivot 1 is equipped with moves sealing ring 4, moves sealing ring 4 and offsets with the lateral wall of static sealing ring 3, and the surface of pivot 1 is equipped with and supports tight mechanism.

In this embodiment, an annular protection plate 18 is fixedly installed on an end face of the sliding sleeve 5 close to the movable sealing ring 4, and lubricating grease is filled inside the annular protection plate 18.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the abutting spring 17 is arranged between the limiting ring 16 and the sliding sleeve 5, so that the thrust of the abutting spring 17 can push the sliding sleeve 5 to abut against the movable sealing ring 4, the movable sealing ring 4 and the static sealing ring 3 seal a gap between the rotating shaft 1 and the end cover 2 of the slurry pump, and liquid in the slurry pump is prevented from leaking; when the rotating shaft 1 rotates, the inner wall of the lantern ring 7 is fixedly provided with the limiting block 13, and the limiting block 13 is slidably mounted with the limiting groove 14 formed in the rotating shaft 1, so that the rotating shaft 1 can drive the lantern ring 7 to rotate through the limiting block 13, when the lantern ring 7 rotates, the fixed pipe 8 fixedly mounted on the outer surface of the lantern ring 7 drives the moving rod 9 to rotate, the centrifugal ball 11 fixedly mounted at one end of the moving rod 9 is expanded outwards by centrifugal force, the centrifugal ball 11 pushes the sliding sleeve 5 towards the direction of the static sealing ring 3 along the inner wall of the conical cavity 6, the sliding sleeve 5 can push the movable sealing ring 4 to tightly abut against the static sealing ring 3, the sealing effect can be further enhanced, and leakage is avoided; through setting up annular protection plate 18 at the one end that sliding sleeve 5 is close to and moves sealing ring 4 to at the inside packing lubricating grease of annular protection plate 18, make lubricating grease can keep the lubricated effect between static sealing ring 3 and the dynamic seal ring 4 constantly, reduce the friction between static sealing ring 3 and the dynamic seal ring 4, lubricating grease also can play sealed effect simultaneously.

Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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. The utility model provides a mechanical seal device for slurry pump, includes pivot (1) and slurry pump end cover (2), its characterized in that, the fixed surface that slurry pump end cover (2) are close to pivot (1) installs static sealing ring (3), the surface cover of pivot (1) is equipped with moves sealing ring (4), it offsets with the lateral wall of static sealing ring (3) to move sealing ring (4), the surface of pivot (1) is equipped with supports tight mechanism.

2. The mechanical sealing device for the slurry pump according to claim 1, wherein the abutting mechanism comprises a sliding sleeve (5) slidably mounted on the rotating shaft (1), a tapered cavity (6) is formed in an inner wall, away from the movable sealing ring (4), of the sliding sleeve (5), a sleeve ring (7) is slidably mounted on an outer surface, located inside the tapered cavity (6), of the rotating shaft (1), and a pushing mechanism is arranged on an outer surface of the sleeve ring (7).

3. The mechanical sealing device for the slurry pump according to claim 2, wherein the pushing mechanism comprises a plurality of fixed tubes (8) which are uniformly and fixedly mounted on the outer surface of the lantern ring (7) in a circumferential manner, a moving rod (9) is inserted into the fixed tubes (8), a retainer ring (10) is fixedly mounted at one end, close to the lantern ring (7), of the moving rod (9), a centrifugal ball (11) is fixedly mounted at the other end of the moving rod (9), a compression spring (12) is sleeved on the outer surface of the moving rod (9), and the compression spring (12) is arranged between the retainer ring (10) and the top wall of the fixed tube (8).

4. The mechanical sealing device for the slurry pump according to claim 2, wherein a limiting block (13) is fixedly mounted inside the sleeve ring (7), and a limiting groove (14) matched with the limiting block (13) is formed in the outer surface of the rotating shaft (1).

5. The mechanical sealing device for the slurry pump according to claim 2, wherein a connecting pipe (15) is fixedly installed on the inner wall of the sliding sleeve (5), and the connecting pipe (15) is fixedly installed on the outer surface of the sleeve ring (7).

6. The mechanical sealing device for the slurry pump according to claim 2, wherein a limit ring (16) is fixedly mounted on the outer surface of the rotating shaft (1) far away from the static sealing ring (3), a resisting spring (17) is sleeved on the outer surface of the rotating shaft (1), and the resisting spring (17) is arranged between the limit ring (16) and the end surface of the sliding sleeve (5).

7. The mechanical sealing device for the slurry pump is characterized in that an annular protection plate (18) is fixedly mounted on one end face of the sliding sleeve (5) close to the movable sealing ring (4), and the interior of the annular protection plate (18) is filled with lubricating grease.