CN214171331U

CN214171331U - Bearing protection sealing device with floating magnetic cover

Info

Publication number: CN214171331U
Application number: CN202022501278.0U
Authority: CN
Inventors: 张军
Original assignee: Aizhi Nanjing Environmental Protection Pipe Joint Technology Co ltd
Current assignee: Aizhi Nanjing Environmental Protection Pipe Joint Technology Co ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-09-10
Anticipated expiration: 2030-11-03

Abstract

The utility model relates to a fluid machinery seals technical field, discloses a take bearing protection sealing device of magnetic force cover that floats outward, its characterized in that: the permanent magnet; when the liquid-near side of the magnetic shield is in abutting connection with the movable ring, the magnetic shield is separated from the base or the static ring by the permanent magnet on the magnetic shield to act magnetic force; when the liquid-near side of the magnetic force cover is in abutting connection with the static ring, the magnetic force cover acts on the magnetic force through the permanent magnet on the magnetic force cover and the dynamic ring in a spaced mode; and the exposed part of the outer peripheral end of the air side of the magnetic shield is provided with a warning part, and the warning part warns the actual operation condition of the seal corresponding to the abrasion loss of the movable ring or the static ring. The beneficial effects of the utility model are that the axial displacement of floating through the magnetic force cover that floats realizes carrying out the dynamic observation to sealing ring consumption and sealed operation effective performance.

Description

Bearing protection sealing device with floating magnetic cover

Technical Field

The utility model relates to a fluid machinery seals technical field, specifically is a bearing protection sealing device of magnetic force cover floats in outband.

Background

In the prior art, the sealing forms for bearing lubrication include labyrinth seal, rubber ring seal, rubber skeleton oil seal and magnetic mechanical seal. The labyrinth seal belongs to non-contact gap seal, the rubber ring and the rubber framework oil seal provide contact pressure with a rotating shaft through elastic deformation of rubber materials or force application of a spring to achieve the purpose of sealing, and the labyrinth seal has the defects of large friction force, shaft abrasion and easy loss; the magnetic mechanical seal is a device for preventing fluid leakage, which is formed by keeping fit and relative sliding of at least one pair of end faces perpendicular to a rotation axis under the action of fluid pressure and compensation mechanism magnetic force and the cooperation of auxiliary seal, and has the advantages of unique mechanical performance, smaller structural size and good sealing effect, eliminating the problems of leakage, overflow, dripping and leakage caused by seal abrasion, improving the service cycle of equipment and reducing environmental pollution, thus being an ideal substitute for the traditional labyrinth seal, rubber ring seal and rubber framework oil seal on mechanical equipment.

Although the design of common magnetic mechanical seal form is various, all there is the problem of carrying out real-time supervision early warning and safety precaution measure to inside sealed operation effective performance, the reason lies in: the dynamic sealing ring and the static sealing ring are positioned in the fluid equipment to seal liquid, and must be sealed to avoid leakage and splashing, so that the reasonable design is necessary; however, this design has the problem that, on the one hand, no effective conditions for the actual operation of the sealing ring can be observed during operation; on the other hand, the follow-up and static sealing rings are worn and gradually thinned to generate displacement, and finally the permanent magnets and the magnetic force components which act with pretightening force at intervals are jointed and collided to cause seal damage, and the whole process is dynamically changed in the sealing process. This kind of condition causes can't change sealed in advance, can only change after the potential safety hazard takes place, especially when the fluid is dangerous medium, even reveal a small amount also cause personnel and the huge hidden danger of mill's safety.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art not enough, the utility model discloses aim at solving this online sealed effective observation and operation safety precaution problem, provide a bearing protection sealing device who is used for the magnetic force cover that floats of outband between bearing, axis of rotation and equipment casing, through the axial floating displacement of the magnetic force cover that floats, realize carrying out the dynamic observation to sealing ring consumption and sealed operation effective performance.

In order to achieve the above object, the utility model provides a following technical scheme:

a bearing protection sealing device with a floating magnetic cover is arranged on a shaft and located on one side, close to air, of a bearing, the sealing device comprises a base, a static ring and a movable ring, wherein the base is fixedly arranged in a shell, the static ring is fixed in the base, the movable ring is movably arranged on the shaft, a contact section of the movable ring and the static ring forms a sealing surface which is perpendicular to the shaft and is attached to and slides, the bearing protection sealing device also comprises a magnetic cover which is arranged at the tail end of the air side of the base, the movable ring and the static ring, a permanent magnet is fixedly arranged at the end part, close to liquid, of the magnetic cover, and the other side of the magnetic cover is an air side; when the liquid-near side of the magnetic shield is in abutting connection with the movable ring, the magnetic shield is separated from the base or the static ring by the permanent magnet on the magnetic shield to act magnetic force; when the liquid-near side of the magnetic force cover is in abutting connection with the static ring, the magnetic force cover acts on the magnetic force through the permanent magnet on the magnetic force cover and the dynamic ring in a spaced mode; the magnetic shield is characterized in that a warning part is arranged on the exposed part of the outer peripheral end of the air side of the magnetic shield, the warning part corresponds to the abrasion loss of the movable ring or the static ring, the actual operation condition of the seal is warned, and the dynamic observation of the abrasion loss and the effective performance of the seal operation between the movable ring and the static ring is realized through the axial floating displacement of the floating magnetic shield.

As an optimization scheme of the utility model the magnetic force cover is close to the liquid side and is equipped with ring channel and base or pegs graft with base, quiet ring radial clearance or float by the rubber circle and cup joint.

As an optimization scheme of the utility model, the annular tank bottom of the magnetic cover is provided with a blocking ring which is axially connected with a movable ring or a static ring in a butting way; the axial blocking of the blocking ring is arranged in the magnetic cover, so that the safety protection of the collision and damage of the internal magnetic overload magnet can be realized, and the safety accident caused by the sealing failure can be prevented.

As the utility model discloses an optimization scheme still includes the locating piece, the locating piece lid forms on the outer circumference of base and magnetic force cover sealing device's collection dress formula is sealed.

As an optimization scheme of the utility model the permanent magnet is any one of magnetic column or magnetic sheet or magnetic tape.

As an optimization scheme of the utility model, the movable ring is of an integral structure or a split structure; the static ring is of an integral structure or a split structure; the magnetic cover is of an integral structure or a split structure; the split structure replacement design of the movable ring, the static ring and the magnetic cover is provided, and the requirements on working conditions are met.

As an optimized proposal of the utility model, the warning part is a warning scale or a mark ribbon or the combination of the warning scale and the mark ribbon, and the warning to the failure of the internal sealing operation and the magnetic force overload is realized by the change of the exposed warning part of the floating magnetic cover; the warning scale is arranged, the mark color band is arranged corresponding to the friction loss between the movable ring and the static ring, and the safety warning for preventing magnetic force overload and magnetic material joint collision is correspondingly realized.

Compared with the prior art, the utility model provides a take bearing protection sealing device of magnetic force cover that floats outward possesses following beneficial effect:

(1) the utility model discloses a contact mechanical seal is used to the fluid, the utility model discloses a unsteady axial displacement of magnetic force cover that floats realizes carrying out the dynamic observation to sealing ring consumption and sealed operation effective performance.

(2) The change of the exposed warning part of the floating magnetic cover realizes the warning of the failure of the internal sealing operation and the magnetic overload.

(3) The axial blocking of the blocking ring arranged in the floating magnetic cover realizes the safety protection of the collision and damage sealing of the internal magnetic overload magnet, and prevents safety accidents caused by sealing failure.

(4) The split sealing element replacement design is provided, and the requirement on working conditions is met widely.

Drawings

Fig. 1 is a structural axial sectional view of a magnetic force cover 5 according to an embodiment of the present invention;

fig. 2 is a structural axial sectional view of a second magnetic force shield 5 according to an embodiment of the present invention;

fig. 3 is an axial cross-sectional view of a magnetic shield 5 in a cartridge-type mechanical seal application in accordance with an embodiment of the present invention;

fig. 4 is an axial cross-sectional view of a second magnetic shield 5 according to an embodiment of the present invention in a cartridge mechanical seal application;

fig. 5 is an axial cross-sectional view of a second magnetic shield 5 according to an embodiment of the present invention in a split mechanical seal application.

The reference numerals in the figures have the meaning: 1-bearing, 2-shell, 3-moving ring, 4-static ring, 5-magnetic cover, 6-permanent magnet, 7-base, 8-blocking ring, 9-pin, 10-positioning block, 11-shaft, 12-marking color band, 13-warning scale and 14-rubber ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The first embodiment is as follows:

as shown in fig. 1 and fig. 3, the present embodiment discloses a static ring compensation cartridge mechanical seal for fluid with an external axial floating magnetic cover, which is used for sealing between a rotating shaft and a housing, and includes a moving ring 3, a static ring 4, a base 7, a blocking ring 8, a magnetic cover 5, and a detachable positioning block 10 between the base 7 and the magnetic cover 5, so as to form a cartridge seal. Wherein, base 7 is fixed to be set up in casing 2, and quiet ring 4 passes through O type circle fixed mounting on base 7, and O type circle assembles between the outer circumferential surface of quiet ring 4 and the inner circumferential surface of base 7, and rotating ring 3 passes through O type circle to be installed on axle 11, and rotating ring 3 and quiet ring 4 contact surface form with axle 11 perpendicular, the gliding sealed face of laminating. Wherein, the axial end near the air side is provided with a magnetic cover 5, namely the ends of the base 7, the moving ring 3 and the static ring 4 which are connected with the shell 2 are provided with the magnetic cover 5 at the air side, and the magnetic cover 5 is connected with the static ring 4 in a butting way near the liquid side; the permanent magnet 6 fixedly arranged on the magnetic force cover 5 close to the liquid side end and the movable ring 3 play a role of magnetic force in a spaced mode; the magnetic force cover 5 is provided with the warning portion on the nearly air side outer peripheral end expose the part, and the warning portion is warning scale 13 and sign typewriter ribbon 12, and the magnetic force cover 5 can observe from the outside that the part circumference is exposed and be equipped with warning scale 13 and sign typewriter ribbon 12, and warning scale 13 corresponds the friction loss volume between rotating ring 1 and the quiet ring 2, warns out sealed actual operation situation, through the axial displacement that floats to the magnetic force cover that floats, realizes carrying out the dynamic observation to rotating ring or quiet ring friction loss volume and sealed operation validity ability.

The movable ring 3 is of an integral structure or a split structure; the static ring 4 is of an integral structure or a split structure; the magnetic shield 5 is of a unitary or split construction. The integral structure is that the moving ring 3 or the static ring 4 or the magnetic cover 5 is an integral body and can not be disassembled; the split structure is formed by splicing two separated semi-rings of the moving ring 3 or the static ring 4 or the magnetic cover 5.

The inboard 5 inboard ring channels that are equipped with of magnetic force cover of this embodiment is pegged graft with base 7, 4 radial clearances of quiet ring, and the tank bottom of ring channel sets up hinders 8 axial and contradict with quiet ring 4 and be connected, and 5 inboard end fixed permanent magnet 6 of magnetic force cover are any one in magnetic column or magnetic sheet or the magnetic tape.

When the magnetic shield 5 works, when the exposed circumferential part of the magnetic shield 5 is subjected to abrasion axial displacement between the follower ring 3 and the stationary ring 4, the warning scale 13 warns the actual operation condition of sealing, the effective performance of sealing is effectively monitored, when the magnetic force is overloaded or the permanent magnet 6 is contacted with the movable ring 3, the exposed circumference of the magnetic shield 5 shows circumferential rotation, and the mark ribbon 12 warns the safety performance and warns the sealing failure.

Example two:

as shown in fig. 2 and fig. 4, the present embodiment is different from the first embodiment in that: the embodiment is a movable ring compensation cartridge mechanical seal, and comprises a movable ring 3, a stationary ring 4, a base 7, a blocking ring 8 and a magnetic cover 5, wherein a detachable positioning block 10 is arranged between the base 7 and the magnetic cover 5 to form a cartridge seal. Wherein, base 7 is fixed to be set up in casing 2, and quiet ring 4 passes through O type circle fixed mounting on base 7, and O type circle assembles between the outer circumferential surface of quiet ring 4 and the inner circumferential surface of base 7, and rotating ring 3 passes through O type circle to be installed on axle 11, and rotating ring 3 and quiet ring 4 contact surface form with axle 11 perpendicular, the gliding sealed face of laminating. Wherein, the base 7 of the connecting shell 2, the movable ring 3 and the end of the dead side of the static ring 4 are provided with a magnetic cover 5, and the side of the magnetic cover 5 close to the liquid is connected with the movable ring 3 in an abutting mode; the permanent magnet 6 fixedly arranged on the magnetic force cover 5 close to the liquid side end and the static ring 4 play a role of magnetic force in a clearance mode; the magnetic force cover 5 can observe that a warning mark color strip 12 is arranged on the circumference of the exposed part from the outside, and the axial clearance between the mark color strip 12 and the base 7 corresponds to the friction loss between the movable ring 3 and the fixed ring 4.

The inner side of the magnetic cover 5 of the embodiment is provided with an annular groove which is inserted with a radial clearance of the base 7 and is in floating sleeve diameter with the movable ring 3 through a rubber ring 14, and the rubber ring 14 is an O-shaped ring; when the blocking ring 8 arranged at the bottom of the annular groove is axially abutted and connected with the movable ring 3 to work, the magnetic cover 5 exposes the mark color band 12 to float along with the movable sealing ring, the actual operation condition of sealing is warned, the effective performance of sealing is effectively monitored, when the magnetic force is overloaded or the permanent magnet is contacted with the stationary ring 4, the magnetic cover 5 is static by rotation, and the mark color band 12 warns safety performance and warns sealing failure.

Example two:

as shown in fig. 2 and fig. 5, the present embodiment is different from the second embodiment in that: the embodiment is a movable ring compensation separation type mechanical seal, which comprises a movable ring 3, a static ring 4, a base 7, a blocking ring 8 and a magnetic cover 5; wherein, base 7 is fixed to be set up in casing 2, and quiet ring 4 is through O type circle fixed mounting on base 7, makes static connection, and O type circle assembles between the outer peripheral surface of quiet ring 4 and the inner peripheral surface of base 7, and rotating ring 3 is installed on axle 11 through O type circle, and rotating ring 3 and quiet ring 4 contact surface form with axle 11 perpendicular, the gliding sealed face of laminating. Wherein, the base 7 of the connecting shell 2, the movable ring 3 and the end of the dead side of the static ring 4 are provided with a magnetic cover 5, and the side of the magnetic cover 5 close to the liquid is connected with the movable ring 3 in an abutting mode; the permanent magnet 6 fixedly arranged on the magnetic force cover 5 close to the liquid side end and the base 7 are separated to act magnetic force; the magnetic force cover 5 can observe that a warning mark color band 12 is arranged on the circumference of the exposed part from the outside, and the axial clearance between the warning mark 12 and the base 7 corresponds to the friction loss between the movable ring 3 and the static ring 4.

The magnetic shield 5 of this embodiment inboard is equipped with the ring channel and is pegged graft with base 7 radial clearance, float through rubber circle 14 with the rotating ring 3 and cup joints footpath, and 8 axial and the rotating ring 3 of contradicting of the seal ring that the tank bottom of ring channel set up are connected.

When the magnetic shield 5 works, the exposed mark color band 12 of the magnetic shield 5 floats along with the servo ring 3 to warn the actual running condition of sealing, the effective performance of sealing is effectively monitored, when the magnetic force is overloaded or the permanent magnet 6 is contacted with the base 7, the magnetic shield 5 is static by rotating, and the mark color band 12 warns the safety performance and warns the sealing failure.

The utility model discloses can prevent again that magnetic force from transshipping, the sealed damage that the magnet joint is wiped and is leaded to through the sealed effective wearing capacity of outside observation to the realization carries out the early warning monitoring to inside seal operation validity, provides effective guarantee to the security operation, the prevention is because of sealed the incident that became invalid, the damage leads to. The mechanical seal of the utility model is provided with a floating magnetic cover on the air side of the base and the seal ring, the floating magnetic cover is close to the fluid inner side and can be connected with a movable ring or a static ring, the inner side end is fixed with a permanent magnet and has a magnetic force separated from the end surface of the connecting ring, the other end and the circumference are exposed outside the air side, the exposed part is also provided with a warning part, the warning part corresponds to the effective abrasion loss of the seal ring, the actual operation condition of the seal is warned, and the safety performance of the seal and the failure of the early warning seal are effectively monitored; when magnetic force overload occurs and magnetic materials are jointed, the floating magnetic cover can rotate or stop along with the sealing ring moving relative to the magnetic force, so that the relative rotating part is effectively prevented from being damaged by being scratched, a warning is given out through the change of the exposed warning part, and safety protection is carried out by the built-in blocking ring; the utility model discloses a mechanical seal still additionally provides subdivision sealing ring and changes the design, facilitates for emergency treatment and wide application, on the basis of the sealed validity of assurance, reliability, has increased the sealed inefficacy of prevention and has set up and safety warning, the utility model relates to a form innovation, design benefit, for safety in production meaning great, economic nature and practicality are strong.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an outer bearing protection sealing device who takes magnetic force cover that floats, it sets up in epaxial and is located the nearly air side of bearing, sealing device is including the fixed base that sets up in the casing and fix quiet ring, the activity that sets up in the base is epaxial rotating ring, the rotating ring forms with the contact section of quiet ring and is perpendicular and the gliding sealed face of laminating of axle, its characterized in that: the permanent magnet; when the liquid-near side of the magnetic shield is in abutting connection with the movable ring, the magnetic shield is separated from the base or the static ring by the permanent magnet on the magnetic shield to act magnetic force; when the liquid-near side of the magnetic force cover is in abutting connection with the static ring, the magnetic force cover acts on the magnetic force through the permanent magnet on the magnetic force cover and the dynamic ring in a spaced mode; and the exposed part of the outer peripheral end of the air side of the magnetic shield is provided with a warning part, and the warning part warns the actual operation condition of the seal corresponding to the abrasion loss of the movable ring or the static ring.

2. The bearing protection sealing device with the external floating magnetic shield as claimed in claim 1, wherein the magnetic shield is provided with an annular groove near the liquid side to be inserted with the base or with the base and the static ring in radial clearance or to be in floating sleeve joint with the rubber ring.

3. The bearing protection and sealing device with the external floating magnetic cover as claimed in claim 2, wherein a blocking ring is arranged at the bottom of the annular groove of the magnetic cover and is in axial interference connection with the movable ring or the static ring.

4. The bearing protection sealing device with the external floating magnetic cover as claimed in claim 1, further comprising a positioning block, wherein the positioning block covers the outer circumferences of the base and the magnetic cover to form cartridge type sealing of the sealing device.

5. The bearing protection and seal device with the external floating magnetic cover as claimed in claim 1, wherein the permanent magnet is any one of a magnetic column, a magnetic sheet or a magnetic tape.

6. The bearing protection sealing device with the external floating magnetic cover according to claim 1, wherein the movable ring is of an integral structure or a split structure; the static ring is of an integral structure or a split structure.

7. The bearing protection and sealing device with the external floating magnetic cover as claimed in claim 1, wherein the magnetic cover is of a monolithic structure or a split structure.

8. The bearing protection and seal device with the external floating magnetic cover as claimed in claim 1, wherein the warning portion is a warning scale or a mark ribbon or a combination of the warning scale and the mark ribbon.