CN218669910U

CN218669910U - Novel shaft end sealing device for pump

Info

Publication number: CN218669910U
Application number: CN202221705113.8U
Authority: CN
Inventors: 周静
Original assignee: Xi'an Zhoushi Electromechanical Co ltd
Current assignee: Xi'an Zhoushi Electromechanical Co ltd
Priority date: 2022-07-06
Filing date: 2022-07-06
Publication date: 2023-03-21
Anticipated expiration: 2032-07-06

Abstract

The utility model discloses a novel shaft end sealing device for pump belongs to pump seal technical field, aims at solving and has the friction between mechanical seal's the rotating ring among the prior art and the quiet ring, leads to the inside temperature of the pump body to rise easily, and the temperature risees the problem that leads to the sealing washer inefficacy easily in the pump body moreover. Through the arrangement of the mechanical sealing structure, the second sealing ring, the third sealing ring and the packing sealing structure, the mechanical sealing structure can form an extremely thin water film between the end surfaces of the two rings, has the cooling and lubricating functions and prevents the leakage between shafts, the second sealing ring and the third sealing ring can be further sealed, and the packing sealing structure realizes the sealing between the pump body and the pump shaft and has the cooling and lubricating functions; through the setting of cooling water seal, cooling water injection well choke and cooling water, can inject or change the cooling water into the pump body through the cooling water injection well choke, prevent that the inside high temperature of the pump body from resulting in sealing washer and packing ring to become invalid, the cooling water seal prevents that the cooling water from taking place to leak.

Description

Novel shaft end sealing device for pump

Technical Field

The utility model relates to a pump sealing technical field specifically is a novel shaft end is sealed for pump device.

Background

The pump is used as a general machine and is widely applied to the fields of municipal administration, water conservancy, power generation, petrochemical industry, steel making and the like. The pump is required to be sealed at the shaft end when in use, and the sealing is a part or measure for preventing fluid or solid particles from leaking from the adjacent joint surfaces and preventing external impurities such as dust, moisture and the like from invading into the interior of machine equipment. The shaft end sealing modes of the pump mainly comprise a packing seal, a mechanical seal, a floating ring seal and a labyrinth seal.

Chinese patent CN207975019U discloses a novel shaft end sealing device for pump, and this patent establishes the cage washer through the cover on the pump shaft, and quiet ring, quiet ring seat and partial rotating ring and the running-in face of quiet ring and rotating ring are located the cage washer outside, but have the friction between rotating ring and the quiet ring, lead to the inside temperature of the pump body to rise easily, still realize sealing through the sealing washer in addition, along with the rising of the inside temperature of the pump body, lead to the sealing washer to become invalid easily.

SUMMERY OF THE UTILITY MODEL

In view of the problems in the prior art, the utility model discloses a novel shaft end sealing device for a pump, which adopts the technical proposal that the shaft end sealing device comprises a pump body, a pump shaft and an end cover, wherein the pump shaft is arranged in the pump body, one side of the pump body is fixedly connected with the end cover, the inner part of the pump body is positioned at the outer side of the pump shaft and is provided with a mechanical sealing structure, an extremely thin water film can be formed between the end surfaces of two rings through the arrangement of the mechanical sealing structure to play the roles of cooling and lubrication, and a first sealing ring is arranged in a movable ring to avoid the leakage between the shafts, thereby having the advantages of small friction power consumption, small leakage amount, good sealing effect, high sealing pressure and long service life, the outer surface of the pump shaft is positioned at one side of the mechanical sealing structure and is fixedly connected with a shaft sleeve which is used for blocking one side of the movable ring, the inner part of the pump body is connected with a stationary ring seat, one side of the end cover is positioned in the pump body, a second spring seat is connected with the end cover, a second spring is arranged between the static ring seat and the second spring seat, one side of the static ring can be blocked and a buffering effect can be achieved through the arrangement of the static ring seat, the second spring seat and the second spring, a cooling water seal is arranged below the second spring seat, the cooling water leakage in the pump body can be prevented through the arrangement of the cooling water seal, a second sealing ring is arranged between the second spring seat and the pump body, a third sealing ring is arranged between the end cover and the pump shaft, the sealing can be further achieved through the arrangement of the second sealing ring and the third sealing ring, the leakage of the cooling water is prevented, a packing sealing structure is arranged between the pump body and the pump shaft, the sealing between the pump body and the pump shaft can be achieved through the arrangement of the packing sealing structure, and the air leakage into the pump body or the cooling water leakage in the pump body can be prevented, play cooling and lubrication action simultaneously, the surface of the pump body is provided with the cooling water injection well choke, through the setting of cooling water injection well choke, can conveniently change the cooling water.

As a preferred technical scheme of the utility model, mechanical seal structure includes first spring holder, first spring, throw-out collar, first sealing washer, rotating ring, quiet ring and water film layer, be connected with first spring holder on the pump shaft, the first spring of inner wall fixedly connected with of first spring holder, the other end fixedly connected with throw-out collar of first spring, there is the rotating ring one side butt of throw-out collar, rotating ring and first spring seat connection, the inside of rotating ring is provided with first sealing washer, there is the water film layer between rotating ring and the quiet ring, through the setting of first spring holder, first spring, throw-out collar, first sealing washer, rotating ring, quiet ring and water film layer, can form the extremely thin water film of one deck between the terminal surface of two rings, play cooling and lubricated effect, have that the friction consumption is little, leak leakage quantity little, sealed effectual, sealing pressure is high, long service life's characteristics.

As a preferred technical scheme of the utility model, first spring holder is through first bolt and pump shaft fixed connection, the rotating ring passes through second bolt and first spring holder fixed connection, the quiet ring passes through the internal connection fixed connection of third bolt and the pump body, through the setting of first bolt, second bolt and third bolt, can fix first spring holder, rotating ring and quiet ring respectively.

As a preferred technical scheme of the utility model, quiet ring seat passes through the internal connection fixed connection of fourth bolt and the pump body, through the setting of fourth bolt, can fix quiet ring seat.

As a preferred technical scheme of the utility model, the end cover passes through fifth bolt and pump body fixed connection, the end cover passes through sixth bolt and second spring holder fixed connection, through the setting of fifth bolt and sixth bolt, can fix end cover and second spring holder respectively.

As an optimal technical scheme of the utility model, packing structure includes packing ring, gland and packing cover, gland and packing cover are filled in proper order to the inside of junction between the pump body and the pump shaft, through realizing the sealed between the pump body and the pump shaft, prevent that the air from leaking into in the pump body or the internal cooling water of pump body leaks, plays cooling and lubrication action simultaneously.

As a preferred technical scheme of the utility model, cooling water injection well choke and the inside intercommunication of the pump body, the inside cooling water of having annotated of the pump body, through the setting of cooling water, can be to the cooling of cooling down of the pump body inside, prevent that the inside high temperature of the pump body from leading to sealing washer and packing ring to become invalid.

The utility model has the advantages that: the utility model discloses a mechanical seal structure, the second sealing washer, third sealing washer and packing seal structure's cooperation setting, mechanical seal structure can form one deck extremely thin water film between the terminal surface of two rings, play the effect of cooling and lubrication, and set up first sealing washer in the rotating ring, the interaxial leakage has been avoided, it is little to have the friction consumption, the leakage quantity is little, sealed effectual, sealing pressure is high, long service life's advantage, second sealing washer and third sealing washer can further seal, prevent that the cooling water from leaking, packing seal structure can realize the seal between the pump body and the pump shaft, prevent that the air from getting into in the pump body or the cooling water leakage in the pump body, have cooling and lubrication action simultaneously; through the cooperation setting of cooling water seal, cooling water injection well choke and cooling water, can inject or change the cooling water into the pump body through the cooling water injection well choke, the cooling water cools off the pump body inside cooling down, prevents that the inside high temperature of the pump body from resulting in sealing washer and packing ring to become invalid, and the cooling water seal can prevent that the inside cooling water of the pump body from taking place to leak.

Drawings

FIG. 1 is a schematic view of a partial front view section structure of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A of the present invention;

fig. 3 is an enlarged schematic view of the position B of the present invention.

In the figure: 1. a pump body; 2. a pump shaft; 3. an end cap; 4. a mechanical seal structure; 401. a first spring seat; 402. a first spring; 403. a push ring; 404. a first seal ring; 405. a moving ring; 406. a stationary ring; 407. a water film layer; 5. a shaft sleeve; 6. a stationary ring seat; 7. a second spring seat; 8. a second spring; 9. cooling and water sealing; 10. a second seal ring; 11. a third seal ring; 12. a packing seal structure; 1201. a packing ring; 1202. a packing gland; 1203. a stuffing sleeve; 13. cooling the water nozzle; 14. a first bolt; 15. a second bolt; 16. a third bolt; 17. a fourth bolt; 18. a fifth bolt; 19. a sixth bolt; 20. and (6) cooling the water.

Detailed Description

Example 1

The technical solution of the present invention will be clearly and completely described with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; 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 to 3, the utility model discloses a novel shaft end sealing device for pump, which adopts the technical scheme that the novel shaft end sealing device for pump comprises a pump body 1, a pump shaft 2 and an end cover 3, wherein the pump shaft 2 is arranged in the pump body 1, one side of the pump body 1 is fixedly connected with the end cover 3 through a fifth bolt 18, the pump shaft 2 is connected with a first spring seat 401, the inner wall of the first spring seat 401 is fixedly connected with a first spring 402, the other end of the first spring 402 is fixedly connected with a push ring 403, one side of the push ring 403 is abutted with a movable ring 405, the movable ring 405 is connected with the first spring seat 401, a first sealing ring 404 is arranged in the movable ring 405, a water film layer 407 is arranged between the movable ring 405 and a stationary ring 406, when the pump shaft 2 rotates, the first spring seat 401, the first spring 402, the first push ring 403 and the movable ring 405 rotate along with the pump shaft 2, the first sealing ring 404 plays a sealing role, the anti-leakage pump is characterized in that inter-shaft leakage is prevented, a static ring 406 is fixed with a pump body 1, a water film layer 407 between a dynamic ring 405 and the static ring 406 plays a role in cooling and lubricating, the first spring seat 401 is fixedly connected with a pump shaft 2 through a first bolt 14, the dynamic ring 405 is fixedly connected with the first spring seat 401 through a second bolt 15, the static ring 406 is fixedly connected with the inside of the pump body 1 through a third bolt 16, a shaft sleeve 5 is fixedly connected to one side of the dynamic ring 405 on the outer surface of the pump shaft 2, the shaft sleeve 5 limits one side of the dynamic ring 405, a static ring seat 6 is fixedly connected to the inside of the pump body 1 through a fourth bolt 17, a second spring seat 7 is fixedly connected to one side of an end cover 3 in the pump body 1 through a sixth bolt 19, a second spring 8 is arranged between the static ring seat 6 and the second spring seat 7, and one side of the static ring seat 6 blocks one side of the static ring 406, the second spring seat 7 and the second spring 8 buffer the stationary ring seat 6, a cooling water seal 9 is arranged below the second spring seat 7, the cooling water seal 9 prevents leakage of cooling water 20, a second sealing ring 10 is arranged between the second spring seat 7 and the pump body 1, a third sealing ring 11 is arranged between the end cover 3 and the pump shaft 2, the second sealing ring 10 and the third sealing ring 11 further seal the interior of the pump body 1, a filler gland 1202, a filler ring 1201 and a filler sleeve 1203 are sequentially filled in the connection between the pump body 1 and the pump shaft 2, the filler gland 1202, the filler ring 1201 and the filler sleeve 1203 prevent air from leaking into the pump body 1 or the cooling water 20 in the pump body 1 from leaking, and meanwhile, the cooling water nozzle 13 is arranged on the outer surface of the pump body 1, the cooling water nozzle 13 is communicated with the interior of the pump body 1, the cooling water 20 is filled in the pump body 1, and the cooling water 20 can be replaced by the cooling water nozzle 13, so that the cooling effect is improved.

The utility model discloses a theory of operation: during installation, the components are fixed by the first bolt 14, the second bolt 15, the third bolt 16, the fourth bolt 17, the fifth bolt 18 and the sixth bolt 19, and cooling water 20 is injected into the pump body 1 through the cooling water nozzle 13; when the pump shaft 2 rotates, the cooling water 20 cools the interior of the pump body 1, the first spring seat 401, the first spring 402, the first push ring 403 and the movable ring 405 rotate together with the pump shaft 2, the first sealing ring 404 plays a sealing role to prevent leakage between shafts, the stationary ring 406 is fixed with the pump body 1, the water film layer 407 between the movable ring 405 and the stationary ring 406 plays a cooling and lubricating role, the shaft sleeve 5 limits one side of the movable ring 405, the stationary ring seat 6 blocks one side of the stationary ring 406, the second spring seat 7 and the second spring 8 buffer the stationary ring seat 6, meanwhile, the packing gland 1202, the packing ring 1201 and the packing sleeve 1203 seal the connection between the pump body 1 and the pump shaft 2 to prevent air from leaking into the pump body 1 or the cooling water 20 in the pump body 1 from leaking, the cooling and lubricating roles are also provided, the cooling water seal 9, the second sealing ring 10 and the third sealing ring 11 further seal the interior of the pump body 1 to prevent the cooling water 20 from leaking from the end cover 3.

The mechanical connection according to the present invention is a conventional means used by those skilled in the art, and can be suggested by limited tests, which is common knowledge.

Components not described in detail herein are prior art.

Although the present invention has been described in detail with reference to the specific embodiments, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge range of those skilled in the art, and modifications or variations without creative efforts are still within the scope of the present invention.

Claims

1. The utility model provides a novel shaft end sealing device for pump, includes the pump body (1), pump shaft (2) and end cover (3), be provided with pump shaft (2) in the pump body (1), one side fixedly connected with end cover (3) of the pump body (1), its characterized in that: the utility model discloses a pump, including pump body (1), pump cover (1), end cover (3), first spring seat (7), first sealing washer (11), second sealing washer (10), third sealing washer (11), packing (12), mechanical seal structure (4) are provided with in the outside that the inside of pump body (2) is located the outside of pump shaft (2), the surface of pump shaft (2) is located one side fixedly connected with axle sleeve (5) of mechanical seal structure (4), the internal connection of pump body (1) has quiet ring seat (6), the internal connection that one side of end cover (3) is located the pump body (1) has second spring holder (7), be provided with second spring (8) between quiet ring seat (6) and second spring holder (7), the below of second spring holder (7) is provided with cooling water seal (9), be provided with second sealing washer (10) between second spring holder (7) and the pump body (1), be provided with third sealing washer (11) between end cover (3) and pump shaft (2), be provided with packing (12) between the pump body (1) and pump shaft (2), the surface of pump body (1) is provided with cooling water injection well choke (13).

2. The novel shaft end sealing device for the pump as claimed in claim 1, wherein: mechanical seal structure (4) include first spring holder (401), first spring (402), push ring (403), first sealing washer (404), rotating ring (405), quiet ring (406) and water rete (407), be connected with first spring holder (401) on pump shaft (2), the inner wall fixedly connected with of first spring holder (401) has first spring (402), the other end fixedly connected with push ring (403) of first spring (402), one side butt joint of push ring (403) has rotating ring (405), rotating ring (405) is connected with first spring holder (401), the inside of rotating ring (405) is provided with first sealing washer (404), there is water rete (407) between rotating ring (405) and quiet ring (406).

3. The novel shaft end sealing device for the pump as claimed in claim 2, wherein: the pump comprises a pump body (1), a first spring seat (401), a movable ring (405), a fixed ring (406) and a fixed ring, wherein the first spring seat (401) is fixedly connected with the pump shaft (2) through a first bolt (14), the movable ring (405) is fixedly connected with the first spring seat (401) through a second bolt (15), and the fixed ring (406) is fixedly connected with the interior of the pump body (1) through a third bolt (16).

4. The novel shaft end sealing device for the pump as claimed in claim 1, wherein: the stationary ring seat (6) is fixedly connected with the interior of the pump body (1) through a fourth bolt (17).

5. The novel shaft end sealing device for the pump as claimed in claim 1, wherein: the end cover (3) is fixedly connected with the pump body (1) through a fifth bolt (18), and the end cover (3) is fixedly connected with the second spring seat (7) through a sixth bolt (19).

6. The novel shaft end sealing device for the pump as claimed in claim 1, wherein: the packing sealing structure (12) comprises a packing ring (1201), a packing gland (1202) and a packing sleeve (1203), wherein the packing gland (1202), the packing ring (1201) and the packing sleeve (1203) are sequentially filled in the connecting part between the pump body (1) and the pump shaft (2).

7. The novel shaft end sealing device for the pump as claimed in claim 1, wherein: the cooling water nozzle (13) is communicated with the inside of the pump body (1), and cooling water (20) is injected into the pump body (1).