CN218093572U

CN218093572U - Particle-resistant mechanical seal for hot water pump

Info

Publication number: CN218093572U
Application number: CN202222287097.1U
Authority: CN
Inventors: 蒋敏; 冯贤良
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 particle-resistant hot water pump mechanical seal, which comprises a static ring, a dynamic ring and a dynamic ring seat, wherein one end of the static ring is matched in the pump body, the other end of the static ring is abutted with one end of the dynamic ring in a rotatable way along the circumferential direction, the other end of the dynamic ring is assembled on the dynamic ring seat in a slidable way along the axial direction, and an elastic compensation component is arranged between the dynamic ring and the dynamic ring seat; the rotating ring and the static ring are made of silicon carbide, a plurality of lubricating grooves which are uniformly distributed along the circumferential direction are formed in the radial outer end of the rotating ring close to one side end face of the static ring, and the plurality of lubricating grooves are communicated with the circumferential outer side wall of the rotating ring. The utility model discloses a resistant granule hot-water pump mechanical seal, simple structure can be applicable to high temperature, have the operating mode of particulate matter medium to the leakproofness is stable.

Description

Particle-resistant mechanical seal for hot water pump

Technical Field

The utility model relates to a mechanical seal technical field particularly, relates to a resistant granule hot-water pump mechanical seal.

Background

The mechanical seal is a shaft seal device of a rotating machine, such as a centrifugal pump, a centrifuge, a reaction kettle, a compressor and the like. Since the rotating shaft penetrates inside and outside the apparatus, so that there is a circumferential gap between the shaft and the apparatus through which the medium in the apparatus leaks out, and if the pressure in the apparatus is lower than atmospheric pressure, air leaks into the apparatus, a shaft sealing device for preventing leakage 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 method in these devices.

In a mechanical sealing structure commonly used in the field of hot water pumps, a sealing grinding surface is usually matched by a graphite ring to a spring ring, the matching mode can well operate when no particles exist in a medium, but hot water pipelines in many regions contain particles with different degrees, and the end surface of the graphite ring is quickly abraded in a working condition with more particles due to poor graphite abrasion resistance, so that the mechanical sealing is failed; in addition, the heat dissipation performance of the sealing ground surface in the existing mechanical seal is insufficient, and in order to accelerate the heat dissipation, a cooling and flushing structure is usually added, so that the mechanical seal structure is inevitably complicated, and the cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem be: overcome at least one defect among the prior art, provide a resistant granule hot-water pump mechanical seal, simple structure can be applicable to the operating mode of high temperature, having the particulate matter medium to the leakproofness is stable.

In order to solve the problems, the utility model provides a particle-resistant hot water pump mechanical seal, which comprises a static ring, a rotating ring and a rotating ring seat, wherein one end of the static ring is matched in a pump body, the other end of the static ring is abutted with one end of the rotating ring in a rotatable manner along the circumferential direction, the other end of the rotating ring is assembled on the rotating ring seat in a slidable manner along the axial direction, and an elastic compensation component is arranged between the rotating ring and the rotating ring seat; the rotating ring and the static ring are made of silicon carbide materials, the rotating ring is close to the radial outer end of one side end face of the static ring, a plurality of lubricating grooves which are uniformly distributed along the circumferential direction are formed in the radial outer end of the side end face of the static ring, and the lubricating grooves are communicated with the circumferential outer side wall of the rotating ring.

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

compared with the pairing structure of the graphite ring to the silicon carbide ring in the traditional sealing friction pair, the mechanical sealing structure of the hot water pump of the utility model is changed into the pairing structure of the silicon carbide to the silicon carbide, and the paired sealing wear surface has stronger particle resistance because the abrasion resistance of the silicon carbide is stronger; meanwhile, in order to ensure that the silicon carbide can better dissipate heat when relatively rubbing the silicon carbide structure, a plurality of lubricating grooves are formed in the end face of the rotating ring, and in the rotating process of the rotating ring, liquid media can rapidly and uniformly enter the sealing ground surface through the lubricating grooves to form a stable sealing liquid film, so that the sealing performance is ensured to be stable; and when realizing sealing performance, good lubrication can effectively avoid dry friction to make mechanical seal can be fine adapt to the operating mode that the temperature is high and have the particulate matter.

As an improvement, the rotating ring comprises a rotating ring main body and a mounting ring which are integrally formed, one end of the mounting ring is assembled in the rotating ring seat, the rotating ring main body is formed on the radial inner side of the other end of the mounting ring, and one end of the rotating ring main body, which is far away from the mounting ring, is abutted against the stationary ring; the width of the grinding surface of the dynamic ring main body is smaller than that of the static ring. In the above-mentioned improvement structure, through to the rotating ring structure to and the grinding face width design of rotating ring, quiet ring make sealed face frictional behavior more stable, calorific capacity reduces.

And the improved structure is characterized in that a chamfer is arranged at the radial outer end of one end, close to the movable ring, of the static ring, and an inclined surface is arranged at one end, close to the movable ring main body, of the mounting ring, so that a V-shaped opening is formed between the inclined surface and the chamfer. In the above-mentioned improved structure, set up the inclined plane through on the rotating ring, set up the chamfer on the quiet ring to the chamfer sets up with the inclined plane relatively, forms a V type opening, makes things convenient for the entering that the medium can be better in the pump chamber to grind the face and form the liquid film, also can guarantee simultaneously that sealed face edge particulate matter is difficult for piling up, and sealed face radiating effect is good, thereby improves mechanical seal life.

In another improvement, an installation groove is arranged on the radial inner side of one end of the movable ring seat close to the stationary ring, one end of the installation ring is assembled in the installation groove, and the elastic compensation component is arranged between the installation ring and the bottom of the installation groove; the side wall of the mounting groove is provided with a limiting convex block, and the radial outer wall of the mounting ring is provided with a limiting sliding groove in sliding fit with the limiting convex block. In the above-mentioned improvement structure, the rotating ring is assembled in the mounting groove in a sliding manner, and is circumferentially limited through the corresponding limiting lug structure, so that the stability of the rotating ring in the axial sliding direction is ensured.

And the elastic compensation assembly comprises a plurality of springs, a plurality of spring holes are uniformly distributed along the circumferential direction at the bottom of the mounting groove, one end of each spring is accommodated in each spring hole, the end part of each spring is abutted against the bottom of each spring hole, and the other end of each spring is abutted against the end face of the mounting ring. In the above-mentioned improved structure, adopt a plurality of springs of circumference equipartition as compensation assembly, simple structure, elastic force is even, steady.

And in the improvement, a gasket is arranged at one end of the mounting ring, which is far away from the movable ring main body, and one end of each spring, which is far away from the spring hole, is abutted against the gasket. Among the above-mentioned improvement structure, can make the more stable tail end that acts on the rotating ring of spring after the gasket structure sets up, guarantee that compensation performance is steady, sealing performance is stable.

And then, the other end of the sleeve is abutted against the gasket. In the above-mentioned improvement structure, make each spring can not radial deflection when the compression after the sleeve structure sets up, guarantee that the elastic compensation who acts on the gasket is more even, steady to guarantee that rotating ring and quiet ring seal face can be more stable laminating, guarantee that sealing performance is stable.

And the improved structure is characterized in that a key groove is formed in the inner wall of the movable ring seat, and the key groove is matched with a flat key on a rotating shaft of the hot water pump. In the above-mentioned improvement structure, the structure that the rotating ring seat passes through the key-type connection with the pump shaft drives, compares in more stability of traditional holding screw drive structure, applicable to high temperature, high-pressure environment that can be better.

Drawings

Fig. 1 is a schematic structural view of the particle-resistant hot water pump after mechanical seal installation;

FIG. 2 is an enlarged view of the structure at X in FIG. 1;

FIG. 3 is a front view of the rotating ring of the present invention;

FIG. 4 is an enlarged view of the structure at Y in FIG. 3;

fig. 5 is an enlarged view of the structure at Z in fig. 1.

Description of reference numerals:

1. a stationary ring; 1.1, chamfering; 2. a moving ring; 2.1, a movable ring main body; 2.2, mounting a ring; 2.2.1, inclined plane; 2.2.2, a limit chute; 3. a movable ring seat; 3.1, mounting grooves; 3.2, spring holes; 3.3, a key groove; 4. a lubrication groove; 5. a limiting bump; 6. a spring; 7. a gasket; 8. a sleeve.

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.

As shown in fig. 1, the utility model provides a resistant granule hot-water pump mechanical seal, including quiet ring 1, rotating ring 2 and rotating ring seat 3, the one end of quiet ring 1 cooperates in the pump body, and is concrete, has preset corresponding portion of joining in marriage in pump body inner chamber, and quiet ring 1 is joined in marriage in the portion of joining in marriage to quiet ring 1 and join in marriage and be equipped with corresponding sealing washer between the portion of joining in marriage. The other end of the static ring 1 is rotatably abutted with one end of the dynamic ring 2 along the circumferential direction to form a sealing grinding surface; but the other end of rotating ring 2 is equipped with on rotating ring seat 3 along axial sliding fit, and is equipped with the elasticity compensation subassembly between rotating ring 2 and the rotating ring seat 3 to make rotating ring 2 have the trend towards the motion of quiet ring 1 all the time, after the sealed face that grinds takes place to wear and tear, under the effect of elasticity compensation subassembly, can guarantee that rotating ring 2 laminates with 1 terminal surface of quiet ring all the time, guarantees sealed stability promptly. In addition, for further promotion sealing wear surface's resistant particle performance, in this embodiment, rotating ring 2, quiet ring 1 are the carborundum material that the wearability is stronger, and rotating ring 2 is nearly the radial outer end of quiet ring 1 side end face is seted up a plurality of lubricated grooves 4 along circumference equipartition, and a plurality of lubricated grooves 4 all with rotating ring 2 circumference lateral wall is linked together, as shown in fig. 2, 3, 4. After the arrangement, in the process that the pump shaft drives the movable ring 2 assembly to rotate, liquid can better enter the ground surface through the lubricating grooves 4, and the stability of a sealing liquid film is ensured.

In the structure, in order to further improve the stability of the driving structure between the movable ring 2 assembly and the pump shaft, the inner wall of the movable ring seat 3 is provided with a key groove 3.3, and the key groove 3.3 is matched with a flat key on the rotating shaft of the hot water pump. Compared with the traditional structure in which the movable ring seat 3 and the pump shaft are driven by the set screws, the structure is easy to loosen the screws in a high-temperature or high-speed environment, so that the sealing performance is unstable; in this embodiment, a key transmission structure is adopted, so that the driving structure is more stable, and the key transmission structure can be applied to a high-temperature and high-speed environment.

In addition, the rotating ring 2 comprises a rotating ring main body 2.1 and a mounting ring 2.2 which are integrally formed, one end of the mounting ring 2.2 is assembled in the rotating ring seat 3, the rotating ring main body 2.1 is formed on the radial inner side of the other end of the mounting ring 2.2, and one end, far away from the mounting ring 2.2, of the rotating ring main body 2.1 is abutted to the stationary ring 1; the grinding surface width of the dynamic ring main body 2.1 is smaller than that of the static ring 1.

As shown in fig. 2, a chamfer 1.1 is provided at the radial outer end of the stationary ring 1 near the end of the movable ring 2, and an inclined surface 2.2.1 is provided at the end of the mounting ring 2.2 near the movable ring body 2.1, so that a V-shaped opening is formed between the inclined surface 2.2.1 and the chamfer 1.1. After setting up like this, can make the medium can be better wash sealed wear face periphery, in time take away solid particle and frictional heat to promote mechanical seal's resistant granule performance and life.

As shown in fig. 1 and 5, a mounting groove 3.1 is formed in the radial inner side of one end, close to the stationary ring 1, of the movable ring seat 3, one end of the mounting ring 2.2 is assembled in the mounting groove 3.1, and the elastic compensation component is arranged between the mounting ring 2.2 and the bottom of the mounting groove 3.1; the lateral wall of the mounting groove 3.1 is provided with a limit lug 5, and the radial outer wall of the mounting ring 2.2 is provided with a limit sliding groove 2.2.2 which is in sliding fit with the limit lug 5. Through the cooperation of limiting lug 5 and limiting chute 2.2.2 for the pump shaft drives the rotating process of the rotating ring 2 assembly, the rotating ring 2 and the rotating ring seat 3 can keep relatively static, thereby avoiding the risk that the rotating ring 2 is cracked. More specifically, the limiting lug 5 in the structure can be directly machined and molded on the inner wall of the mounting groove 3.1, the limiting lug 5 can be separately machined and then screwed or welded to the inner wall of the mounting groove 3.1.

In addition, in this embodiment, as shown in fig. 1 and 5, the elastic compensation assembly includes a plurality of springs 6, a plurality of spring holes 3.2 are disposed at the bottom of the mounting groove 3.1, the spring holes are circumferentially and uniformly distributed, one end of each spring 6 is accommodated in the spring hole 3.2, the end of each spring 6 abuts against the bottom of the spring hole 3.2, and the other end of each spring 6 abuts against the end face of the mounting ring 2.2. More specifically, the mounting ring 2.2 is kept away from the one end of rotating ring main part 2.1 and still is provided with gasket 7, and the one end that each spring 6 kept away from spring hole 3.2 all with gasket 7 looks butt, and gasket 7 structure mainly increases the stationarity of each spring 6 to guarantee compensation performance's stability, finally guarantee sealing performance's stability.

On the other hand, for further improving the stability of the working state of the spring 6, the sleeve 8 with one open end is inserted into each spring hole 3.2 in a sliding manner, the open end of the sleeve 8 is inserted into the spring hole 3.2, one end of the spring 6 is accommodated in the inner cavity of the sleeve 8, the other end of the sleeve 8 is abutted to the gasket 7, and the sleeve 8 structure is arranged so that the spring 6 cannot deflect radially when compressed under axial stress, thereby ensuring that the elastic force acting on the gasket 7 is more uniform and stable. More specifically, in this embodiment, in order to realize that spring 6 of spring hole 3.2 can wash through the medium in real time, guarantee not stifled by the particulate matter, still be equipped with the through-hole in the bottom of each spring hole 3.2 and the bottom of the nearly gasket 7 one end of sleeve 8 for the medium gets into and washes spring 6.

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 disclosure.

Claims

1. A particle-resistant hot water pump mechanical seal is characterized in that: the pump comprises a static ring (1), a moving ring (2) and a moving ring seat (3), wherein one end of the static ring (1) is matched in a pump body, the other end of the static ring (1) is in rotatable abutting joint with one end of the moving ring (2) along the circumferential direction, the other end of the moving ring (2) is assembled on the moving ring seat (3) in a sliding way along the axial direction, and an elastic compensation assembly is arranged between the moving ring (2) and the moving ring seat (3) so that the moving ring (2) always has the tendency of moving towards the static ring (1); rotating ring (2), quiet ring (1) are the carborundum material, just rotating ring (2) are nearly a plurality of lubrication groove (4) along the circumference equipartition are seted up to the radial outer end of quiet ring (1) a side end face, and are a plurality of lubrication groove (4) all with rotating ring (2) circumference lateral wall is linked together.

2. The particulate resistant hot water pump mechanical seal of claim 1, wherein: the movable ring (2) comprises a movable ring main body (2.1) and a mounting ring (2.2) which are integrally formed, one end of the mounting ring (2.2) is assembled in the movable ring seat (3), the movable ring main body (2.1) is formed on the radial inner side of the other end of the mounting ring (2.2), and one end, far away from the mounting ring (2.2), of the movable ring main body (2.1) is abutted to the static ring (1); the grinding surface width of the dynamic ring main body (2.1) is smaller than that of the static ring (1).

3. The particulate resistant hot water pump mechanical seal of claim 2, wherein: quiet ring (1) is nearly the radial outer end of rotating ring (2) one end is equipped with the chamfer, collar (2.2) are nearly rotating ring main part (2.1) one end is equipped with inclined plane (2.2.1), so that inclined plane (2.2.1) with form V type opening between the chamfer.

4. The particulate resistant hot water pump mechanical seal of claim 2, wherein: a mounting groove (3.1) is formed in the radial inner side of one end, close to the static ring (1), of the movable ring seat (3), one end of the mounting ring (2.2) is assembled in the mounting groove (3.1), and the elastic compensation component is arranged between the mounting ring (2.2) and the bottom of the mounting groove (3.1); the mounting structure is characterized in that a limiting convex block (5) is arranged on the side wall of the mounting groove (3.1), and a limiting sliding groove (2.2.2) in sliding fit with the limiting convex block (5) is formed in the radial outer wall of the mounting ring (2.2).

5. The particulate resistant hot water pump mechanical seal of claim 4, wherein: the elastic compensation assembly comprises a plurality of springs (6), a plurality of spring holes (3.2) which are uniformly distributed along the circumferential direction are formed in the bottom of the mounting groove (3.1), one end of each spring (6) is accommodated in each spring hole (3.2), the end of each spring is abutted against the bottom of each spring hole (3.2), and the other end of each spring (6) is abutted against the end face of the mounting ring (2.2).

6. The particulate resistant hot water pump mechanical seal of claim 5, wherein: and a gasket (7) is further arranged at one end, far away from the movable ring main body (2.1), of the mounting ring (2.2), and one end, far away from the spring hole (3.2), of each spring (6) is abutted to the gasket (7).

7. The particulate resistant hot water pump mechanical seal of claim 6, wherein: a sleeve with an opening at one end is inserted into each spring hole (3.2) in a sliding manner, the opening end of the sleeve is inserted into the spring hole (3.2), one end of the spring (6) is accommodated in the inner cavity of the sleeve, and the other end of the sleeve is abutted to the gasket (7).

8. The particulate resistant hot water pump mechanical seal of claim 1, characterized in that: the inner wall of the movable ring seat (3) is provided with a key groove (3.3), and the key groove (3.3) is matched with a flat key on a rotating shaft of the hot water pump.