CN211059061U

CN211059061U - Novel nuclear main pump socket ring and nuclear main pump sealing structure

Info

Publication number: CN211059061U
Application number: CN201922105807.2U
Authority: CN
Inventors: 徐永昕; 于广录
Original assignee: DALIAN HONGZE PUMPS Ltd
Current assignee: DALIAN HONGZE PUMPS Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-07-21
Anticipated expiration: 2029-11-29

Abstract

The utility model relates to a nuclear main pump accessory technical field provides a novel nuclear main pump socket ring and nuclear main pump seal structure, novel nuclear main pump socket ring includes the socket ring is whole to be the annular, the section of socket ring is "L" type, the stage portion of socket ring sets up annular process groove of circle on the circumferencial direction, the wear-resistant coating of hot spraying in the process groove, wear-resistant coating's thickness is 0.2 ~ 0.5mm wear-resistant coating adopts the tungsten alloy material, the degree of depth in process groove is 0.20 ~ 0.40mm set up at least one pinhole in the socket ring, set up at least one spring hole in the socket ring, the utility model provides a novel nuclear main pump socket ring can improve burning socket ring working surface hardness, increases the wearability, prevents, increase of service life.

Description

Novel nuclear main pump socket ring and nuclear main pump sealing structure

Technical Field

The utility model relates to a nuclear main pump accessory field especially relates to a novel nuclear main pump socket ring and nuclear main pump seal structure.

Background

The nuclear main pump is in a loop system of the nuclear island, and is a pump for driving coolant to circulate in an RCP (reactor coolant system) system. The nuclear main pump is sealed to be the important part of guaranteeing nuclear main pump safety, effective operation, and is sealed not good, appears leaking, not only influences continuous operation duration, reduces economic benefits, also can cause the potential safety hazard, causes to be polluted the water leakage by the radiation material, harms environment and personal safety.

The socket ring is a main component of a pump shaft of the nuclear main pump during sealing. The socket ring is a carrier of the floating static ring of the nuclear main pump seal, and the floating static ring of the mechanical seal can slide up and down along the socket ring in work. The floating static ring is subjected to various forces, such as gravity, liquid film force, spring force, sealing ring friction force, static force and the like, and the floating static ring is constantly in high-frequency vibration and axial sliding along the socket ring due to continuous change of the stress, so that the working surface of the socket ring is easy to wear, the roughness is increased, the liquid film state of a sealing surface is deteriorated, the floating static ring is blocked, and the sealing leakage amount is increased to cause failure.

SUMMERY OF THE UTILITY MODEL

The utility model discloses mainly solve prior art's socket ring working surface and easily wear and tear, roughness increase, sealed face liquid film attitude worsens, and floating quiet ring jamming, sealed leakage quantity increase and the technical problem who became invalid of letting out provides a novel nuclear main pump socket ring to improve socket ring working surface hardness, increase the wearability, prevent to burn increase of service life.

The utility model provides a novel nuclear main pump socket ring, include that socket ring (1) wholly is the annular, the section of socket ring (1) is "L" type, the stage portion of socket ring (1) sets up annular technology groove in the circumferencial direction, technology inslot hot spraying wear-resisting coating (11).

Preferably, the thickness of the wear-resistant coating (11) is 0.2-0.5 mm.

Preferably, the wear-resistant coating (11) is made of tungsten alloy material.

Preferably, the depth of the process groove is 0.20-0.40 mm.

Preferably, at least one pin hole is arranged in the socket ring (1).

Preferably, at least one spring hole is arranged in the socket ring (1).

Correspondingly, the utility model also provides a nuclear main pump seal structure, include: a dynamic ring (5), a floating static ring (4) and a novel nuclear main pump bearing ring provided by any embodiment of the utility model;

the movable ring (5), the floating static ring (4) and the insert ring (1) are sequentially sleeved on a pump shaft (6) of the nuclear main pump from bottom to top;

a support ring (3) and an O-shaped ring (2) are arranged on the inner side of the upper part of the floating static ring (4); the O-shaped ring (2) is arranged above the support ring (3);

and the wear-resistant coating (11) of the socket ring (1) is in contact with the inner side of the upper part of the floating static ring (4), the inner side of the support ring (3) and the inner side of the O-shaped ring (2).

Preferably, a shaft sleeve (7) is arranged between the dynamic ring (5), the floating static ring (4), the inserting bearing ring (1) and the pump shaft (6);

the movable ring (5) is fixedly connected with the shaft sleeve (7).

Preferably, a pin (12) is arranged between the floating static ring (4) and the socket ring (1), and the pin (12) is arranged in a pin hole of the socket ring (1).

Preferably, a spring (8) is arranged between the floating static ring (4) and the socket ring (1), and the spring (8) is arranged in a spring hole of the socket ring (1).

The utility model provides a pair of novel nuclear main pump socket ring and nuclear main pump seal structure improves socket ring primary structure, set up the technology groove in the socket ring to adopt hot spraying tungsten alloy material to form wear-resistant coating at the technology inslot, wear-resistant coating and the contact of the interior part in unsteady quiet ring upper portion, the main pump during operation receives the unsteady quiet ring of exogenic action to produce axial displacement and vibration, wear-resistant coating increases socket ring local surface hardness, the reinforcing ability of resistance to wear guarantees wholeness ability, increase of service life.

Drawings

Fig. 1 is a schematic structural diagram of a novel nuclear main pump socket ring provided by the invention;

fig. 2 is a schematic structural diagram of the sealing structure of the nuclear main pump provided by the present invention.

Reference numerals: 1. a socket ring; 2. an O-shaped ring; 3. a support ring; 4. a floating stationary ring; 5. a moving ring; 6. a pump shaft; 7. a shaft sleeve; 8. a spring; 9. low pressure water; 10. high-pressure water; 11. a wear-resistant coating; 12. and (4) a pin.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings and the embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the relevant portions of the present invention are shown in the drawings.

Fig. 1 is the structural schematic diagram of the novel nuclear main pump socket ring provided by the utility model. As shown in fig. 1, the embodiment of the utility model provides a novel nuclear main pump socket ring, include:

the bearing and inserting ring 1 is annular as a whole, the section of the bearing and inserting ring 1 is L type (the section is cut along the center of the bearing and inserting ring 1, the sections of two ends are L type), a circular process groove is arranged on the table part of the bearing and inserting ring 1 in the circumferential direction, and the wear-resistant coating 11 is thermally sprayed in the process groove.

In the embodiment, the thickness of the wear-resistant coating 11 is 0.2-0.5 mm. The wear-resistant coating 11 is made of tungsten alloy materials and is sprayed on the process groove. The depth of the process groove is 0.20-0.40 mm, the wear-resistant coating 11 is slightly thicker than the process groove in the spraying process, and the thick part is removed after rough machining. At least one pin hole is arranged in the socket ring 1. At least one spring hole is arranged in the insert ring 1. The pin holes and spring holes are used to mount the pins and springs when the seal structure is assembled.

The utility model provides a novel nuclear main pump socket ring is when the preparation, leave 0.20 ~ 0.40 mm's technology groove in wear-resistant coating 11 department in advance, local hot spraying W alloy material, require coating hardness (HV1,000 ~ 1,300) and bonding strength (≧ 70MPa) to reach the performance index, spraying thickness 0.2 ~ 0.5mm, the rough machining wear-resistant coating 11 except part, the coarse grinding wear-resistant coating 11 again, later use wear-resistant coating 11 to process all the other positions to the finished product as the benchmark, then to coating position finish grinding to the finished product.

The utility model provides a novel nuclear main pump socket ring, socket ring 1 can the cover establish the pump of nuclear main pump outside with other seal structure cooperations, realize the sealed to the nuclear main pump. In the embodiment, the original structure of the socket ring is improved, a process groove is formed in the socket ring 1, and the wear-resistant coating 11 is formed in the process groove by adopting a thermal spraying tungsten alloy material. The wear-resistant coating 11 increases the local surface hardness of the socket ring, enhances the wear resistance, ensures the overall performance and prolongs the service life.

Example two

Fig. 2 is a schematic structural diagram of the sealing structure of the nuclear main pump provided by the present invention. The embodiment provides a nuclear main pump seal structure, including: rotating ring 5, unsteady quiet ring 4 and the utility model discloses the novel nuclear main pump socket ring that arbitrary embodiment provided.

The movable ring 5, the floating static ring 4 and the insertion ring 1 are sequentially sleeved on a pump shaft 6 of the nuclear main pump from bottom to top; the inner side of the upper part of the floating static ring 4 is provided with a support ring 3 and an O-shaped ring 2; the O-ring 2 is arranged above the support ring 3. And the wear-resistant coating 11 of the socket ring 1 is in contact with the inner side of the upper part of the floating static ring 4, the inner side of the support ring 3 and the inner side of the O-shaped ring 2.

A shaft sleeve 7 is arranged between the dynamic ring 5, the floating static ring 4, the socket ring 1 and the pump shaft 6; the movable ring 5 is fixedly connected with the shaft sleeve 7. A pin 12 is arranged between the floating static ring 4 and the socket ring 1, and the pin 12 is arranged in a pin hole of the socket ring 1. And a spring 8 is arranged between the floating static ring 4 and the socket ring 1, and the spring 8 is arranged in a spring hole of the socket ring 1.

The sealing structure of the nuclear main pump provided by the embodiment is assembled according to an assembly drawing shown in fig. 2, a shaft sleeve 7 is sleeved outside a pump shaft 6 of the nuclear main pump, and a movable ring 5, a floating stationary ring 4, a support ring 3, an O-ring 2 and a socket ring 1 are sequentially sleeved outside the shaft sleeve 7 from bottom to top; a spring 8 and a pin 12 are arranged in the socket ring 1; high-pressure water 10 is arranged outside the floating static ring 4, and low-pressure water 9 is arranged between the shaft sleeve 7 and the floating static ring 4. The socket ring 1 can be sleeved outside a shaft sleeve 7 of a pump shaft of the nuclear main pump to support the floating static ring 4, the pin 12 limits the floating static ring to rotate, and the spring 8 supports the floating static ring 4 to be tightly matched with the end face of the movable ring 5. The socket ring 1 is a carrier of a floating static ring of the nuclear main pump seal, and the floating static ring 4 of the mechanical seal is tightly matched with the upper end surface of the movable ring 5 under the action of the elastic force of the spring 8 in work, so that the nuclear main pump is sealed.

The utility model provides a nuclear main pump seal structure sets up wear-resistant coating 11 in the socket ring 1 of adoption, wear-

resistant coating

11 and 3 inboards of support ring, O type circle 2 inboards and the inboard part in the upper portion of the quiet ring of floating 4, receive the unsteady quiet ring of exogenic action 4 production axial displacement and vibration at the main pump during operation. The wear-resistant coating 11 increases the local surface hardness of the socket ring, enhances the wear resistance, ensures the overall performance and prolongs the service life.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or some or all of the technical features may be equivalently replaced, without substantially departing from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The novel nuclear main pump socket ring is characterized by comprising a socket ring (1) which is annular as a whole, wherein the cross section of the socket ring (1) is L-shaped, a circular process groove is formed in the table part of the socket ring (1) in the circumferential direction, and a wear-resistant coating (11) is thermally sprayed in the process groove.

2. The novel nuclear main pump socket ring according to claim 1, wherein the thickness of the wear-resistant coating (11) is 0.2-0.5 mm.

3. The novel nuclear main pump socket ring according to claim 1 or 2, wherein the wear-resistant coating (11) is made of a tungsten alloy material.

4. The novel bearing ring for the nuclear main pump as claimed in claim 1, wherein the depth of the process groove is 0.20-0.40 mm.

5. The novel nuclear main pump socket ring according to claim 1, wherein at least one pin hole is provided in the socket ring (1).

6. The novel nuclear main pump socket ring according to claim 1 or 5, characterized in that at least one spring hole is provided in the socket ring (1).

7. A nuclear main pump seal structure, comprising: a dynamic ring (5), a floating static ring (4) and a novel nuclear main pump socket ring according to any one of claims 1 to 6;

8. The nuclear main pump sealing structure according to claim 7, wherein a shaft sleeve (7) is provided between the dynamic ring (5), the floating static ring (4), the insert-and-insert ring (1), and the pump shaft (6);

the movable ring (5) is fixedly connected with the shaft sleeve (7).

9. The nuclear main pump seal structure according to claim 7, wherein a pin (12) is provided between the floating stationary ring (4) and the socket ring (1), the pin (12) being placed in a pin hole of the socket ring (1).

10. The nuclear main pump sealing structure according to claim 7, wherein a spring (8) is provided between the floating stationary ring (4) and the insert ring (1), the spring (8) being disposed in a spring hole of the insert ring (1).