CN218062780U

CN218062780U - Radial mechanical seal structure and pump

Info

Publication number: CN218062780U
Application number: CN202220700011.0U
Authority: CN
Inventors: 项少聪
Original assignee: Shanghai Yuanan Liquid Equipment Technology Co ltd
Current assignee: Shanghai Yuanan Liquid Equipment Technology Co ltd
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2022-12-16
Anticipated expiration: 2032-03-24

Abstract

The utility model discloses a radial mechanical seal structure and pump. Wherein radial mechanical seal structure includes: a drive shaft; the movable ring is arranged on the transmission shaft and used for sealing the medium accommodating space; quiet ring subassembly, quiet ring subassembly includes main quiet ring and vice quiet ring, follows the radial just edge of transmission shaft is kept away from the direction of transmission shaft is equipped with in proper order main quiet ring with vice quiet ring, main quiet ring vice quiet ring is located the rotating ring is close to one side of medium accommodation space. According to the radial mechanical sealing structure with the structure, the main static ring and the auxiliary static ring are arranged along the radial direction of the transmission shaft, so that the length of a cantilever of the transmission shaft is shortened, and the performance of the pump is improved; and parts are reduced, thereby reducing cost.

Description

Radial mechanical seal structure and pump

Technical Field

The utility model relates to a mechanical seal technical field, concretely relates to radial mechanical seal structure and pump.

Background

A pump is a machine that delivers or pressurizes a fluid. Since the drive shaft extends through the pump chamber of the pump with a circumferential gap between the drive shaft and the pump chamber through which the medium leaks outwardly if the pressure in the pump chamber is greater than atmospheric pressure, and conversely if the pressure in the pump chamber is less than atmospheric pressure, air leaks into the pump chamber, a mechanical seal against leakage is necessary.

The prior art discloses a mechanical seal structure, which comprises a transmission shaft, a driving ring, a main stationary ring, an auxiliary moving ring and an auxiliary stationary ring, wherein the driving ring, the main stationary ring, the auxiliary stationary ring and the auxiliary moving ring are arranged along the axial direction of the transmission shaft and along the direction far away from a pump cover.

However, the mechanical seal structure described above makes the cantilever of the drive shaft longer, which results in greater shaft end run-out, thereby degrading the performance of the pump.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming among the prior art cantilever of transmission shaft longer and lead to the axle head to beat big more to the defect of the performance of pump has been reduced, thereby provides a radial mechanical seal structure and pump.

A radial mechanical seal structure comprising:

a drive shaft;

the movable ring is arranged on the transmission shaft and used for sealing the medium accommodating space;

quiet ring subassembly, quiet ring subassembly includes main quiet ring and vice quiet ring, follows the transmission shaft radially just follow and keep away from the direction of transmission shaft is equipped with in proper order main quiet ring with vice quiet ring, main quiet ring vice quiet ring is located the rotating ring is close to one side of medium accommodation space.

Further, a gap is formed between the main static ring and the transmission shaft.

Further, still include first elastic component and second elastic component, first elastic component locates between main quiet ring and the pump chamber, the second elastic component locate the vice quiet ring with between the pump chamber.

Further, the first elastic member is a spring, and the second elastic member is a wave spring.

Further, the cooling passage communicates with a cooling space formed by the main stationary ring, the sub stationary ring, and the pump chamber.

Further, the sealing device further comprises a first sealing element and/or a second sealing element and/or a third sealing element, wherein the first sealing element is arranged between the main static ring and the pump cavity, the second sealing element is arranged between the auxiliary static ring and the pump cavity, and the third sealing element is arranged between the dynamic ring and the transmission shaft.

Further, the first seal and/or the second seal and/or the third seal are O-rings.

Furthermore, the anti-rotation device further comprises an anti-rotation part, and the anti-rotation part is used for connecting the static ring assembly and the pump cavity.

Furthermore, the rotation preventing part penetrates through the first passing part of the main static ring and the second passing part of the auxiliary static ring and is connected with the pump cavity.

A pump comprises the radial mechanical sealing structure.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a pair of radial mechanical seal structure, include: a drive shaft; the movable ring is arranged on the transmission shaft and used for sealing the medium accommodating space; quiet ring subassembly, quiet ring subassembly includes main quiet ring and vice quiet ring, follows the transmission shaft radially just follow and keep away from the direction of transmission shaft is equipped with in proper order main quiet ring with vice quiet ring, main quiet ring vice quiet ring is located the rotating ring is close to one side of medium accommodation space. According to the radial mechanical sealing structure with the structure, the main static ring and the auxiliary static ring are arranged along the radial direction of the transmission shaft, so that the length of a cantilever of the transmission shaft is shortened, and the performance of a pump is improved; and parts are reduced, thereby reducing cost.

2. The utility model provides a pair of radial mechanical seal structure, first elastic component is the spring, the second elastic component is the ripples spring. The radial mechanical sealing structure of the structure can reduce the space occupied by the first elastic part along the axial direction by arranging the wave spring.

3. The utility model provides a pair of radial mechanical seal structure, cooling channel communicate in the cooling space, through main quiet ring vice quiet ring with the pump chamber forms the cooling space. A radial mechanical seal structure of this structure can let in the coolant liquid to cooling channel, has reduced the temperature of the sealed mill flour between main quiet ring, the vice quiet ring to prevent to appear because of the condition that medium viscosity is high, lubricating property is poor, the sealed mill flour generates heat and damages futilely, guarantee life, and when main quiet ring damages and takes place to reveal, the medium of revealing can be taken away along with the coolant liquid, thereby can not cause the scene all to be the condition of medium to appear.

4. The utility model provides a pair of radial mechanical seal structure still includes first sealing member and/or second sealing member and/or third sealing member, wherein first sealing member is located between main quiet ring and the pump chamber, the second sealing member is located vice quiet ring with between the pump chamber, the third sealing member is located the rotating ring with between the transmission shaft. A radial mechanical sealing structure of the structure ensures better sealing performance by arranging the first sealing element and/or the second sealing element and/or the third sealing element.

6. The utility model provides a pair of pump, including foretell radial mechanical seal structure. The pump with the structure has the advantages of the radial mechanical sealing structure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a cross-sectional view of a radial mechanical seal provided in an embodiment of the present invention;

FIG. 2 is a schematic view of the radial mechanical seal shown in FIG. 1 without the secondary stationary ring;

FIG. 3 is a schematic view of the radial mechanical seal shown in FIG. 1 without the main stationary ring;

description of reference numerals:

1-transmission shaft, 2-moving ring, 31-main fixed ring, 32-auxiliary fixed ring, 41-first elastic element, 42-second elastic element, 51-first sealing element, 52-second sealing element, 53-third sealing element, 6-rotation-preventing element, 7-medium, 8-pump cavity, 91-inlet cooling channel and 92-outlet cooling channel.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. 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.

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 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 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 in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

The present embodiment provides a radial mechanical seal structure as shown in fig. 1 to 3, which includes a transmission shaft 1, a rotating ring 2, a stationary ring assembly, a first elastic member 41, a second elastic member 42, a first seal 51, a second seal 52, a third seal 53, and an anti-rotation member 6. The transmission shaft 1 penetrates through the pump cavity 8, and the pump cavity 8 is connected to the pump cover; the rotating ring 2 is arranged on the transmission shaft 1 and is abutted against the pump cavity 8, the rotating ring 2 is used for sealing a medium accommodating space, and the medium accommodating space is formed in the pump cavity 8. It should be noted that the pump cover is not shown in fig. 1 and is located on the left side of the pump chamber 8 in fig. 1.

As shown in fig. 1 to 3, the stationary ring assembly includes a main stationary ring 31 and an auxiliary stationary ring 32, the main stationary ring 31 and the auxiliary stationary ring 32 are sequentially disposed along the radial direction of the transmission shaft 1 and along the direction away from the transmission shaft 1, and the main stationary ring 31 and the auxiliary stationary ring 32 are disposed on one side of the movable ring 2 close to the medium accommodating space. Wherein, a gap is arranged between the main static ring 31 and the transmission shaft 1.

As shown in fig. 1 to 3, the first elastic member 41 is provided between the main stationary ring 31 and the pump chamber 8, and the second elastic member 42 is provided between the sub stationary ring 32 and the pump chamber 8. Specifically, the first elastic member 41 is a spring or the like, and the second elastic member 42 is a wave spring or the like. By providing the wave spring, the space occupied by the first elastic member 41 in the axial direction can be reduced.

The cooling passage in the present embodiment communicates with a cooling space formed by the main stationary ring 31, the sub stationary ring 32, and the pump chamber 8, wherein the first elastic member 41 and the second elastic member 42 are located in the cooling space. With this arrangement, the space of the first and second

elastic members

41 and 42 can be sufficiently utilized to form a cooling space, thereby saving space. Referring specifically to fig. 1 to 3, the cooling passages include an inlet cooling passage 91 and an outlet cooling passage 92 that are in communication, the inlet cooling passage 91 and the outlet cooling passage 92 being located on different sides of the propeller shaft 1, wherein the inlet cooling passage 91 has a cooling inlet and communicates with the cooling space, and the outlet cooling passage 92 has a cooling outlet and communicates with the cooling space.

Can let in the coolant liquid such as cooling water to cooling passage, reduce the temperature of sealed mill flour between main quiet ring 31, the vice quiet ring 32 to prevent to appear because of the circumstances that medium 7 viscosity is high, lubricating property is poor, sealed mill flour dry grinding generates heat and damages, guarantee life, and when main quiet ring 31 damages and takes place to reveal, the medium 7 of revealing can be taken away along with the coolant liquid, thereby can not cause the scene all to be the circumstances of medium 7 to appear.

As shown in fig. 1 to 3, a first seal 51 is provided between the main stationary ring 31 and the pump chamber 8, a second seal 52 is provided between the sub stationary ring 32 and the pump chamber 8, and a third seal 53 is provided between the rotating ring 2 and the drive shaft 1. As an alternative embodiment, one or two of the first seal 51, the second seal 52 and the third seal 53 may also be provided. Specifically, the first seal 51, the second seal 52, and the third seal 53 are O-rings or others. By providing the first seal member 51, the second seal member 52, and the third seal member 53, a preferable sealing performance is ensured.

In this embodiment, the stationary ring assembly and the pump chamber 8 are connected by an anti-rotation member 6. Referring to fig. 1 to 3, the rotation preventing member 6 is inserted through the first passage portion of the main stationary ring 31 and the second passage portion of the sub stationary ring 32 and connected to the pump chamber 8. The first passage portion of the main stationary ring 31 and the second passage portion of the sub stationary ring 32 are disposed close to each other. Specifically, the anti-rotation member 6 may be an anti-rotation pin or the like.

In the radial mechanical sealing structure in the embodiment, the main static ring 31 and the auxiliary static ring 32 are arranged along the radial direction of the transmission shaft 1, so that the length of a cantilever of the transmission shaft 1 is shortened, and the performance of the pump is improved; and parts are reduced, thereby reducing cost.

Example 2

The present embodiment provides a pump including the radial mechanical seal structure of embodiment 1.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A radial mechanical seal, comprising:

a drive shaft;

quiet ring subassembly, quiet ring subassembly includes main quiet ring and vice quiet ring, follows the radial just edge of transmission shaft is kept away from the direction of transmission shaft is equipped with in proper order main quiet ring with vice quiet ring, main quiet ring vice quiet ring is located the rotating ring is close to one side of medium accommodation space.

2. A radial mechanical seal according to claim 1, wherein a clearance is provided between said main stationary ring and said drive shaft.

3. A radial mechanical seal according to claim 1 or 2, further comprising a first elastic member and a second elastic member, wherein said first elastic member is provided between said main stationary ring and said pump chamber, and said second elastic member is provided between said sub stationary ring and said pump chamber.

4. A radial mechanical seal according to claim 3, wherein said first elastic member is a spring and said second elastic member is a wave spring.

5. A radial mechanical seal structure according to claim 1 or 2, wherein a cooling passage communicates with a cooling space formed by said main stationary ring, said sub stationary ring and a pump chamber.

6. A radial mechanical seal according to claim 1 or 2, further comprising a first seal and/or a second seal and/or a third seal, wherein said first seal is disposed between said main stationary ring and a pumping chamber, said second seal is disposed between said auxiliary stationary ring and said pumping chamber, and said third seal is disposed between said moving ring and said drive shaft.

7. A radial mechanical seal according to claim 6, wherein the first seal and/or the second seal and/or the third seal is an O-ring.

8. A radial mechanical seal according to claim 1 or 2, further comprising an anti-rotation member by which the stationary ring assembly and the pump chamber are connected.

9. A radial mechanical seal according to claim 8, wherein said anti-rotation member is disposed through said first passage portion of said main stationary ring and said second passage portion of said sub stationary ring and is connected to said pump chamber.

10. A pump comprising a radial mechanical seal according to any one of claims 1 to 9.