CN218093571U

CN218093571U - Integrated mechanical seal for double-suction pump

Info

Publication number: CN218093571U
Application number: CN202222255753.XU
Authority: CN
Inventors: 励栩健; 吴磊波
Original assignee: NINGBO TIANGONG MACHINERY SEALING CO LTD
Current assignee: Ningbo Tiangong Fluid Technology Co ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2022-12-20
Anticipated expiration: 2032-08-26

Abstract

The utility model provides a double entry pump is with collection dress formula mechanical seal, including axle sleeve, gland, the rotating ring is equipped with to the one end of axle sleeve, the quiet ring is equipped with to the one end that the gland is close to the rotating ring, the quiet ring is kept away from the one end rotating ring of gland along the rotatable butt of circumference, the gland is close to the rotating ring one end inboard and is equipped with the first mounting groove, the one end slidable of quiet ring is equipped with in the first mounting groove, and be equipped with the elastic compensation subassembly between the bottom of first mounting groove and the quiet ring, detachably connected with a plurality of stoppers along the circumference distribution on the terminal surface of the gland other end, be equipped with the spacing groove on the outer wall of axle sleeve, the radial inner cartridge of each stopper cooperates in the spacing groove; the radial inboard that quiet ring one end was kept away from to the gland still is equipped with the choke ring, and the one end that the quiet ring was kept away from to the gland is equipped with the clamp plate that is used for the spacing choke ring of axial. The utility model discloses a double suction pump is with collection dress formula mechanical seal, simple structure, easy dismounting, sealing performance is stable, and long service life.

Description

Integrated mechanical seal for double-suction pump

Technical Field

The utility model relates to a mechanical seal technical field particularly, relates to a double suction pump is with collection dress formula mechanical seal.

Background

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 rotating shaft extends through the inside and outside of the apparatus, so that there is a circumferential gap between the shaft and the apparatus, through which the medium in the apparatus leaks outwards, and if the pressure in the apparatus is lower than atmospheric pressure, air leaks into the apparatus, a leak-proof shaft seal arrangement is necessary. The shaft seal has many kinds, and the mechanical seal has advantages such as a small leakage amount and a long life, and therefore the mechanical seal is the most important shaft seal system in these devices.

The double suction pump is an important form of centrifugal pump, and because of its high lift and large flow rate, it is widely used for water supply and drainage in industry and city, and also for irrigation and drainage in farmland and orchard, and for delivering clear water or other liquid with similar physical and chemical properties. Most of mechanical seals applied to the structure of the double-suction pump at present are in a bulk structure, namely, a movable ring component, a static ring component, a fixed gland and other structures are respectively installed during installation, so that the installation process is complicated, and the collision of a sealing surface is easy to occur during the installation process, so that the sealing failure is caused; because the bulk structure needs to be installed on site one by one, the condition of neglected installation of parts can occur if an installer cares nothing; and the bulk structure is also troublesome to disassemble during later maintenance, and the allowable PV value is relatively low in the use process, so that the service life of the mechanical seal is shortened in partial high-pressure high-rotation-speed working conditions.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem be: overcome at least one defect among the prior art, provide a collection dress formula mechanical seal for double suction pump, simple structure, easy dismounting, sealing performance is stable.

In order to solve the problems, the utility model provides a collection dress formula mechanical seal for double suction pump, including the axle sleeve and suit in the outside gland of axle sleeve, the rotating ring is equipped with to the one end of axle sleeve, the gland is close to the one end of rotating ring is equipped with quiet ring, the quiet ring is kept away from the one end of gland with the rotating ring is along the rotatable butt in circumference, the gland is close to the radial inboard of the one end of rotating ring is equipped with first mounting groove, the one end slidable of quiet ring is adorned in the first mounting groove, and be equipped with the elastic compensation subassembly between the bottom of first mounting groove and the quiet ring, detachably connected with a plurality of stoppers along the circumference distribution on the terminal surface of the gland other end, be equipped with the spacing groove on the outer wall of axle sleeve, the radial inner of each stopper all cartridge cooperation in the spacing groove; the radial inner side of one end, far away from the static ring, of the gland is further provided with a second mounting groove, a throttling ring is arranged in the second mounting groove, and a pressing plate used for axially limiting the throttling ring is arranged at one end, far away from the static ring, of the gland.

Compared with the prior art, the utility model, useful part lies in:

the mechanical sealing structure of the utility model is a simple container type structure, is applied to a double-suction pump and is mainly used for replacing the existing bulk component type mechanical sealing, the container type structure is in a form of integral assembly and integral disassembly when disassembly and assembly are carried out, and single components are not required to be installed one by one, thereby effectively improving the installation efficiency and avoiding the condition of neglected assembly and misassembly of parts; in addition, a static ring compensation type structure is adopted in the integrated mechanical sealing structure, so that the elastic compensation part is not influenced by a rotating part in the operation process, and more stable elastic compensation performance, namely the stability of the sealing performance is ensured; in addition, the throttling ring is further arranged in the structure, when the main seal grinding surface leaks, the throttling ring can play a role of temporarily sealing a medium, the medium is prevented from directly leaking to an atmosphere end, and buffering time is provided for maintenance and replacement of the mechanical seal.

As an improvement, one end of the throttle ring is abutted to the pressure plate, an elastic part is arranged between the bottom of the second mounting groove and the other end of the throttle ring, and the end faces of the throttle ring abutted to the pressure plate are polished sealing faces. In the above-mentioned improvement structure, the clamp plate structure has realized that the axial of choke ring is spacing to choke ring terminal surface and clamp plate terminal surface are the polishing sealed face, under the effect of elastic component, guarantee steady sealing performance, prevent promptly that sealed mill face from taking place to leak, make the medium leak to the atmosphere end from the choke ring.

And the second mounting groove is provided with a first anti-rotation pin, and the throttle ring is provided with a first anti-rotation pin groove matched with the first anti-rotation pin. In the above-mentioned improvement structure, first anti-rotation pin sets up and makes the restrictor ring can keep steady when receiving circumference effort, avoids the restrictor ring to take place offset at mechanical seal operation in-process, guarantees its terminal surface and clamp plate end face seal's stability.

And in a further improvement, the elastic part comprises a plurality of first springs, a plurality of first spring holes which are uniformly distributed along the circumferential direction are formed in the bottom of the second mounting groove, one end of each first spring is assembled in each first spring hole, the end part of each first spring is abutted against the bottom of each first spring hole, and the other end of each first spring is abutted against one end, far away from the pressing plate, of the throttling ring. In the above-mentioned improvement structure, adopt a plurality of first springs yesterday elastic component, can be so that the effort of being used in the throttle ring terminal surface upper end more steady, order about the throttle ring through elastic force and offset tightly with the clamp plate terminal surface, still have certain buffering effect simultaneously, avoid the throttle ring to damage.

And in a further improvement, a collecting channel is reserved between the circumferential outer wall of the throttling ring and the circumferential side wall of the second mounting groove, a liquid collecting hole communicated with the collecting channel along the radial direction is formed in the side wall of the gland, and the outer end of the liquid collecting hole is connected with a plug. In the above-mentioned improvement structure, can realize letting out light, the portable collection of leakage liquid through the setting of collecting channel, collecting hole.

And the elastic compensation assembly comprises a plurality of second springs, a plurality of second spring holes are uniformly distributed along the circumferential direction at the bottom of the first mounting groove, one end of each second spring is correspondingly assembled in each second spring hole, the end part of each second spring is abutted with the bottom of the second spring hole, and the other end of each second spring is abutted with one end of the static ring, which is far away from the dynamic ring. In the improved structure, the elastic compensation part adopts a plurality of second springs, so that the compensation force is more stable; and realize the location of each second spring through the second spring hole, stability when further reinforcing the second spring is flexible, can also make things convenient for the installation location of second spring simultaneously.

And in a further improvement, a gasket is further arranged at one end of the static ring, which is far away from the dynamic ring, one end of the gasket is abutted against one end of the static ring, and one end of each second spring, which is far away from the spring hole, is abutted against the other end of the gasket. In the improved structure, the arrangement of the gasket structure effectively promotes the stability of each second spring in the working state, thereby ensuring the stable sealing performance of the mechanical seal.

The end, far away from the stationary ring, of the gasket is provided with a plurality of positioning pins which are evenly distributed along the circumferential direction of the gasket, and each positioning pin penetrates through each second spring respectively until the positioning pins are inserted into the corresponding second spring holes in a sliding manner; one end of the gasket, which is close to the static ring, is provided with a second anti-rotation pin, and the other end of the static ring, which is far away from the rotating end, is provided with a second anti-rotation pin slot which is assembled with the second anti-rotation pin. In the above-mentioned improvement structure, the setting of locating pin and second put commentaries on classics round pin has realized that the circumference of quiet ring prevents changeing to the locating pin cartridge can also play the effect of positioning spring in second spring hole, makes the second spring have better stability when the compression.

Drawings

Fig. 1 is a schematic structural view of the integrated mechanical seal for a double suction pump according to the present invention mounted on a rotating shaft;

fig. 2 is an enlarged structural view at X in fig. 1.

Description of reference numerals:

1. a shaft sleeve; 1.1, a limiting groove; 1.2, mounting a boss; 1.2.1, a movable ring mounting groove; 2. a gland; 2.1, a first mounting groove; 2.2, a second mounting groove; 2.3, a first spring hole; 2.4, liquid collecting holes; 2.5, a second spring hole; 3. a moving ring; 4. a stationary ring; 4.1, a second anti-rotation pin slot; 5. a limiting block; 6. a restrictor ring; 6.1, a first anti-rotation pin slot; 7. pressing a plate; 8. a first anti-rotation pin; 9. a first spring; 10. a collection channel; 11. a plug; 12. a second spring; 13. a gasket; 14. positioning pins; 15. a second anti-rotation pin; 16. a connecting bolt; 17. a third roll-over pin; 18. a drive ring; 19. the screw is driven.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; 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 as a specific case by those skilled in the art.

As shown in fig. 1, the utility model provides a container type mechanical seal for a double suction pump, which comprises a shaft sleeve 1 sleeved outside a rotating shaft of the double suction pump, a gland 2 sleeved outside the shaft sleeve 1, and the gland 2 mainly used for connecting and fixing with a pump body; corresponding connecting bolts 16 are arranged on the gland 2 as shown in the figure, and when the whole set of mechanical seal is installed in the pump cavity, the connecting bolts 16 are fixedly connected with the pump body.

Specifically, an integrally formed installation boss 1.2 is arranged at one end of the shaft sleeve 1, a rotating ring installation groove 1.2.1 is formed in the installation boss 1.2, a rotating ring 3 is assembled in the rotating ring installation groove 1.2.1, a corresponding sealing ring is arranged between the radial outer end of the rotating ring 3 and the rotating ring installation groove 1.2.1, and a third overturning pin 17 used for preventing the rotating ring 3 from rotating circumferentially is further arranged at the bottom of the rotating ring installation groove 1.2.1. In addition, a static ring 4 is assembled at one end of the gland 2 close to the dynamic ring 3, and one end of the static ring 4 far away from the gland 2 is in rotatable abutting joint with the dynamic ring 3 along the circumferential direction so as to form a sealing friction pair; the radial inboard of the nearly rotating ring 3's of gland 2 one end is equipped with first mounting groove 2.1, the one end slidable of quiet ring 4 is furnished with in first mounting groove 2.1, and be equipped with the elastic compensation subassembly between the bottom of first mounting groove 2.1 and quiet ring 4, detachable is connected with a plurality of stopper 5 along circumference distribution on the terminal surface of the 2 other ends of gland, be equipped with spacing groove 1.1 on the outer wall of axle sleeve 1, the equal cartridge cooperation in spacing groove 1.1 of the radial inner of each stopper 5, thereby make axle sleeve 1, gland 2, rotating ring 3 and quiet ring 4 collection dress be monolithic structure, make things convenient for the whole dress of mechanical seal to tear open in the pump body, and the efficiency is improved. Specifically, in the above structure, the end of the shaft sleeve 1 away from the movable ring 3 is further provided with the driving ring 18, the driving ring 18 is provided with a plurality of driving screws 19 distributed along the circumferential direction, when the whole mechanical seal is installed in the pump body, the shaft sleeve 1 is fastened on the rotating shaft through the driving screws 19, and the gland 2 is connected and fixed with the pump body through the connecting bolt 16, that is, the working position of the mechanical seal is limited, so that the limiting block 5 needs to be removed at this time, otherwise, the normal operation of the mechanical seal is affected. Therefore, the limiting block 5 in the structure actually plays a role in product pre-packaging, and is convenient to integrally install; certainly when mechanical seal need dismantle, can install stopper 5 once more, convenient whole dismantlement.

On the other hand, in the structure, the radial inner side of one end, away from the stationary ring 4, of the gland 2 is further provided with a second mounting groove 2.2, a throttling ring 6 is arranged in the second mounting groove 2.2, and one end, away from the stationary ring 4, of the gland 2 is provided with a pressing plate 7 for axially limiting the throttling ring 6. Specifically, one end of the throttling ring 6 is abutted to the pressing plate 7, an elastic part is arranged between the bottom of the second mounting groove 2.2 and the other end of the throttling ring 6, the end faces of the throttling ring 6 and the pressing plate 7 are both polished sealing faces, and the end face of the throttling ring 6 is tightly attached to the end face of the pressing plate 7 under the action of the elastic part to form a sealing face. Preferably, in the embodiment, the throttle ring 6 is a graphite ring, so that the end face of the throttle ring can be polished conveniently.

In addition, in order to prevent the throttle ring 6 from rotating under the rotation of the shaft sleeve 1, a first anti-rotation pin 8 is arranged at the bottom of the second mounting groove 2.2, and a first anti-rotation pin groove 6.1 matched with the first anti-rotation pin 8 is formed in the throttle ring 6.

As shown in fig. 1, the elastic member in this embodiment includes a plurality of first springs 9, a plurality of first spring holes 2.3 equally divided along the circumferential direction are disposed at the bottom of the second mounting groove 2.2, one end of each first spring 9 is fitted in the first spring hole 2.3, and the end of each first spring 9 abuts against the bottom of the first spring hole 2.3, and the other end of each first spring 9 abuts against one end of the throttle ring 6 away from the pressure plate 7. More specifically, leave collection channel 10 between the circumference outer wall of choke ring 6 and the circumference lateral wall of second mounting groove 2.2, and set up along radial intercommunication to collection channel 10 on the lateral wall of gland 2 the collecting port 2.4, the outer end of collecting port 2.4 is connected with end cap 11, in case the vice emergence of friction is leaked, the medium can get into the sealed intracavity between the vice and the axle sleeve 1 outer wall of friction to the medium can be collected in collecting port 2.4 through collection channel 10 under mechanical seal's rotation effect, only need when shutting down, open end cap 11 and can unify the collection with leaking the medium.

Furthermore, elasticity compensation assembly includes a plurality of second springs 12 among the above-mentioned structure, and the bottom of first mounting groove 2.1 is equipped with a plurality of second spring holes 2.5 along the circumference equipartition, and the corresponding assembly of one end of each second spring 12 is in each second spring hole 2.5 and tip and second spring hole 2.5 bottom butt, and the other end of each second spring 12 and the one end butt that the rotating ring 3 was kept away from to quiet ring 4.

As shown in fig. 1 and 2, a gasket 13 is further disposed at one end of the stationary ring 4 away from the moving ring 3, one end of the gasket 13 abuts against one end of the stationary ring 4, and one end of each second spring 12 away from the spring hole 2.5 abuts against the other end of the gasket 13. More specifically, the one end that the quiet ring 4 was kept away from to gasket 13 is equipped with a plurality of locating pins 14 that divide along its circumference equally, and each locating pin 14 passes each second spring 12 respectively until slip cartridge in the second spring hole 2.5 that corresponds, and the one end that the nearly quiet ring 4 of gasket 13 is equipped with second anti-rotation pin 15, and the quiet ring 3 one end of keeping away from of 4 is equipped with the second anti-rotation pin groove 4.1 with second anti-rotation pin 15 supporting. In this structure, in order to optimize the structure, the number of the second anti-rotation pins 15 is at least two and symmetrically arranged, and the second anti-rotation pins 15 may be directly and integrally formed as the other ends of the positioning pins 14 at the corresponding positions.

In addition, as shown in fig. 1, in this embodiment, a corresponding flushing hole 2.6 is further provided on the circumferential outer side wall of the gland 2, and the flushing hole 2.6 extends to the sealing friction pair position towards the medium end, and a flushing liquid is introduced into the flushing hole 2.6 to flush the sealing friction pair position, so as to flush away solid particles around the sealing friction pair in time and avoid damage to the sealing wear surface; and the flushing fluid can also take away the frictional heat in time, avoids the sealing ring to generate the risk of heat cracking, thereby prolonging the service life of the seal.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present invention.

Claims

1. The utility model provides a two suction pump is with collection dress formula mechanical seal, includes axle sleeve (1) and suit and is in axle sleeve (1) outside gland (2), the one end of axle sleeve (1) is furnished with rotating ring (3), gland (2) are close the one end of rotating ring (3) is furnished with quiet ring (4), quiet ring (4) are kept away from the one end of gland (2) with rotating ring (3) are along the rotatable butt of circumference, its characterized in that: a first mounting groove (2.1) is formed in the radial inner side of one end, close to the movable ring (3), of the gland (2), one end of the static ring (4) is slidably assembled in the first mounting groove (2.1), an elastic compensation assembly is arranged between the bottom of the first mounting groove (2.1) and the static ring (4), a plurality of limiting blocks (5) distributed along the circumferential direction are detachably connected to the end face of the other end of the gland (2), a limiting groove (1.1) is formed in the outer wall of the shaft sleeve (1), and the radial inner ends of the limiting blocks (5) are inserted and matched in the limiting groove (1.1); the radial inner side of one end, far away from the static ring (4), of the gland (2) is further provided with a second mounting groove (2.2), a throttling ring (6) is arranged in the second mounting groove (2.2), and one end, far away from the static ring (4), of the gland (2) is provided with a pressing plate (7) used for limiting the throttling ring (6) in the axial direction.

2. The integrated mechanical seal for a double suction pump according to claim 1, wherein: one end of the throttling ring (6) is abutted to the pressure plate (7), an elastic piece is arranged between the bottom of the second mounting groove (2.2) and the other end of the throttling ring (6), and the end faces of the throttling ring (6) and the pressure plate (7) in abutting joint are polished sealing faces.

3. The integrated mechanical seal for a double suction pump according to claim 2, wherein: the bottom of the second mounting groove (2.2) is provided with a first anti-rotation pin (8), and the throttle ring (6) is provided with a first anti-rotation pin groove (6.1) matched with the first anti-rotation pin (8).

4. The integrated mechanical seal for a double suction pump according to claim 2 or 3, wherein: the elastic part comprises a plurality of first springs (9), a plurality of first spring holes (2.3) which are uniformly distributed along the circumferential direction are formed in the bottom of the second mounting groove (2.2), one end of each first spring (9) is assembled in the first spring hole (2.3), the end of each first spring (9) is abutted against the bottom of the first spring hole (2.3), and the other end of each first spring (9) is abutted against one end, far away from the pressing plate (7), of the throttling ring (6).

5. The integrated mechanical seal for a double suction pump according to claim 3, wherein: a collecting channel (10) is reserved between the circumferential outer wall of the throttling ring (6) and the circumferential side wall of the second mounting groove (2.2), a liquid collecting hole (2.4) communicated with the collecting channel (10) in the radial direction is formed in the side wall of the gland (2), and the outer end of the liquid collecting hole (2.4) is connected with a plug (11).

6. The integrated mechanical seal for a double suction pump according to claim 1, wherein: the elastic compensation assembly comprises a plurality of second springs (12), a plurality of second spring holes (2.5) uniformly distributed along the circumferential direction are formed in the bottom of the first mounting groove (2.1), one end of each second spring (12) is correspondingly assembled in each second spring hole (2.5), the end part of each second spring is abutted to the bottom of each second spring hole (2.5), and the other end of each second spring (12) is abutted to one end, far away from the movable ring (3), of the stationary ring (4).

7. The integrated mechanical seal for a double suction pump according to claim 6, wherein: and a gasket (13) is further arranged at one end, far away from the moving ring (3), of the static ring (4), one end of the gasket (13) is abutted against one end of the static ring (4), and one end, far away from the second spring hole (2.5), of each second spring (12) is abutted against the other end of the gasket (13).

8. The integrated mechanical seal for a double suction pump according to claim 7, wherein: one end of the gasket (13) far away from the static ring (4) is provided with a plurality of positioning pins (14) uniformly distributed along the circumferential direction of the gasket, and each positioning pin (14) respectively penetrates through each second spring (12) until the positioning pins are inserted into the corresponding second spring holes (2.5) in a sliding manner; gasket (13) are nearly the one end of quiet ring (4) is equipped with second anti-rotation pin (15), quiet ring (4) are kept away from rotating ring (3) one end be equipped with second anti-rotation pin groove (4.1) of second anti-rotation pin (15) suit.