CN218718792U

CN218718792U - Double-end-face mechanical seal

Info

Publication number: CN218718792U
Application number: CN202222617552.XU
Authority: CN
Inventors: 李平; 陆俊杰; 叶传剑; 李少峰; 董军锋; 励佳栋; 励永平
Original assignee: Ningbo Donglian Mechanical Seal Co ltd
Current assignee: Ningbo Donglian Mechanical Seal Co ltd
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2023-03-24
Anticipated expiration: 2032-09-28

Abstract

The utility model provides a double mechanical seal belongs to mechanical seal technical field, include: the shaft sleeve is provided with a moving ring, and two end faces of the moving ring are both smooth faces; the first stationary ring seat is provided with a first stationary ring; the second stationary ring seat is provided with a second stationary ring; first quiet ring holder, rotating ring and the quiet ring holder of second are arranged along the axial of axle sleeve in proper order, and first quiet ring holder is located the both sides of rotating ring respectively with the quiet ring holder of second, thereby first quiet ring is contradicted with two terminal surfaces of rotating ring respectively with the quiet ring of second and is connected and form bi-polar face and seal. The beneficial effects of the utility model are that: the mechanical seal forms double-end-face seal through the movable ring and the two stationary rings, is ingenious in structure, and is suitable for high-pressure and high-rotation-speed working environments.

Description

Double-end-face mechanical seal

Technical Field

The utility model belongs to the technical field of mechanical seal, a double mechanical seal is related to.

Background

The mechanical seal is a device for preventing fluid leakage, which is formed by at least one pair of end faces perpendicular to the rotation axis, and the end faces are kept in fit and relatively slide under the action of fluid pressure and elastic force (or magnetic force) of a compensation mechanism and the cooperation of an auxiliary seal.

The existing mechanical seal is usually sealed by matching two moving rings with two static rings respectively, but the structure is more complex, the assembly is more troublesome, and the mechanical seal is not suitable for working environments with high pressure and high rotating speed.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a double mechanical seal.

The purpose of the utility model can be realized by the following technical proposal: a double mechanical seal comprising:

the bearing comprises a shaft sleeve, a bearing sleeve and a bearing, wherein a moving ring is arranged on the shaft sleeve, and two end faces of the moving ring are both smooth faces;

the first stationary ring seat is provided with a first stationary ring;

the second stationary ring seat is provided with a second stationary ring;

the first quiet ring holder the rotating ring and the quiet ring holder of second are followed the axial of axle sleeve is arranged in proper order, just first quiet ring holder with the quiet ring holder of second is located respectively the both sides of rotating ring, first quiet ring with the quiet ring of second respectively with two terminal surfaces of rotating ring are contradicted and are connected thereby and are formed bi-polar face and seal.

Preferably, the sealing device further comprises a sealing seat assembly, the first stationary ring seat and the second stationary ring seat are both located in the sealing seat assembly, and the first stationary ring seat and the second stationary ring seat are connected with the sealing seat assembly through a stop pin.

Preferably, a plurality of first springs are installed in the seal seat assembly, and each of the first springs is annularly arranged and is connected with the first stationary ring seat in an abutting manner, so that a compensation force towards the direction of the moving ring is applied to the first stationary ring seat.

Preferably, a plurality of second springs are installed in the seal seat assembly, and each of the second springs is annularly arranged and is connected with the second stationary ring seat in an abutting manner, so that a compensation force towards the direction of the moving ring is applied to the second stationary ring seat.

Preferably, a lining ring is arranged between one end of the seal seat assembly close to the first stationary seat and the shaft sleeve.

Preferably, the seal seat assembly is provided with a first flushing channel, a second flushing channel and a third flushing channel, the first flushing channel is communicated with the position between the first stationary seat and the seal seat assembly, the second flushing channel is communicated with the position between the second stationary seat and the seal seat assembly, and the third flushing channel is communicated with the position between the lining ring and the seal seat assembly.

Preferably, sealing rings are arranged between the first stationary ring seat and the sealing seat assembly and between the second stationary ring seat and the sealing seat assembly.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the mechanical seal forms double-end-face seal by a moving ring and two static rings, has a very ingenious structure and is suitable for high-pressure and high-rotation-speed working environments.

2. The seal receptacle assembly keeps fixed for the axle sleeve, and first quiet ring and second are quiet to be enclosed when rotating with the rotating ring both ends relative fixed on the axle sleeve, and pivot and axle sleeve can be at the seal receptacle internal rotation.

3. The cleaning agent or the coolant injected into the seal seat assembly enters the two ends of the annular cavity through the first flushing channel and the second flushing channel respectively, and the cleaning agent or the coolant injected into the seal seat assembly flushes the position of the lining ring through the third flushing channel, so that the flushing efficiency and the cooling efficiency are greatly improved.

Drawings

Fig. 1 is the overall structure schematic diagram of the double mechanical seal of the present invention.

Fig. 2 is a schematic view of a partial structure of the double mechanical seal of the present invention.

In the figure, 100, a shaft sleeve; 110. a moving ring; 200. a first stationary ring seat; 210. a first stationary ring; 300. a second stationary ring seat; 310. a second stationary ring; 400. a seal seat assembly; 410. a first spring; 420. a second spring; 430. a gasket; 440. a first flushing channel; 450. a second flushing channel; 460. a third flushing channel.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, a double mechanical seal includes: the bearing comprises a shaft sleeve 100, a first static ring seat 200 and a second static ring seat 300, wherein a dynamic ring 110 is installed on the shaft sleeve 100, and two end faces of the dynamic ring 110 are both smooth faces; the first stationary ring seat 200 is provided with a first stationary ring 210; the second stationary ring base 300 is provided with a second stationary ring 310; first quiet ring seat 200 the rotating ring 110 and second quiet ring seat 300 is followed the axial of axle sleeve 100 is arranged in proper order, just first quiet ring seat 200 with second quiet ring seat 300 is located respectively the both sides of rotating ring 110, first quiet ring 210 with second quiet ring 310 respectively with thereby two terminal surfaces of rotating ring 110 are contradicted and are connected and form bi-polar face and seal.

In actual structure, the axle sleeve 100 overlaps in the pivot and can rotate along with the pivot together, the annular arch has on the axle sleeve 100, the rotating ring 110 is fixed on the annular arch, and first quiet ring seat 200 and second quiet ring seat 300 are located the bellied both sides of annular respectively, thereby make first quiet ring seat 200 and second quiet ring seat 300 distribute in the both sides of rotating ring 110, and then make first quiet ring 210 and second quiet ring 310 closely laminate with the smooth surface at the both ends of rotating ring 110 respectively, form double-ended face after first quiet ring 210 and second quiet ring 310 and two smooth surface laminates and seal, and this kind forms double-ended face through a rotating ring 110 and two quiet rings and seals, the structure is very ingenious, and be applicable to in the operational environment of high pressure and high rotational speed.

As shown in fig. 1, the double mechanical seal further includes a seal seat assembly 400, the first stationary ring seat 200 and the second stationary ring seat 300 are both located in the seal seat assembly 400, and the first stationary ring seat 200 and the second stationary ring seat 300 are connected to the seal seat assembly 400 through a stop pin.

The seal seat assembly 400 is sleeved on the shaft sleeve 100, the seal seat assembly 400 is fixed relative to the shaft sleeve 100, the first stationary ring 200 and the second stationary ring 300 keep sealing when rotating relative to the two ends of the movable ring 110 fixed on the shaft sleeve 100, and the rotating shaft and the shaft sleeve 100 can rotate in the seal seat.

Preferably, a plurality of first springs 410 are installed in the seal housing assembly 400, and each of the first springs 410 is annularly arranged and is in abutting connection with the first stationary ring housing 200 so as to apply a compensation force to the first stationary ring housing 200 in a direction toward the rotating ring 110.

Preferably, a plurality of second springs 420 are installed in the seal housing assembly 400, and each of the second springs 420 is annularly arranged and is connected to the second stationary ring housing 300 in an abutting manner, so as to apply a compensation force to the second stationary ring housing 300 in a direction toward the rotating ring 110.

When the first stationary ring 210 and the moving ring 110 are worn, the first stationary ring seat 200 is pushed toward the moving ring 110 by the first plurality of springs 410, and similarly, when the second stationary ring 310 and the moving ring 110 are worn, the second stationary ring seat 300 is pushed toward the moving ring 110 by the second plurality of springs 420, thereby providing wear compensation.

As shown in fig. 1, a gasket 430 is disposed between an end of the seal seat assembly 400 close to the first stationary seat 200 and the shaft sleeve 100. The bushing 430 lines up between the seal housing assembly 400 and the shaft sleeve 100.

Preferably, the seal seat assembly 400 is provided with a first flushing channel 440, a second flushing channel 450 and a third flushing channel 460, the first flushing channel 440 is communicated with a position between the first stationary seat 200 and the seal seat assembly 400, the second flushing channel 450 is communicated with a position between the second stationary seat 300 and the seal seat assembly 400, and the third flushing channel 460 is communicated with a position between the lining ring 430 and the seal seat assembly 400.

The mechanical seal has a three-way flushing and cooling structure, an annular cavity is formed among the seal seat assembly 400, the first stationary seat 200, the second stationary seat 300 and the moving ring 110, wherein a cleaning agent or a cooling agent injected into the seal seat assembly 400 respectively enters the two ends of the annular cavity through the first flushing channel 440 and the second flushing channel 450, and the cleaning agent or the cooling agent injected into the seal seat assembly 400 flushes the position of the lining ring 430 through the third flushing channel 460, so that the flushing efficiency and the cooling efficiency are greatly improved.

Preferably, a sealing ring (not shown) is disposed between the first stationary ring base 200 and the seal base assembly 400 and between the second stationary ring base 300 and the seal base assembly 400. The sealing effect of mechanical seal has been assisted to the sealing washer.

It should be noted that all the directional indicators (such as up, down, left, right, front, back \8230;) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

Furthermore, the descriptions in the present application as to "first," "second," "a," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Claims

1. A double mechanical seal, comprising:

the bearing comprises a shaft sleeve (100), wherein a movable ring (110) is mounted on the shaft sleeve (100), and two end faces of the movable ring (110) are both smooth faces;

a first stationary ring seat (200), the first stationary ring seat (200) being mounted with a first stationary ring (210);

a second stationary ring seat (300), the second stationary ring seat (300) being mounted with a second stationary ring (310);

first quiet ring holder (200) rotating ring (110) and second quiet ring holder (300) are followed the axial of axle sleeve (100) is arranged in proper order, just first quiet ring holder (200) with second quiet ring holder (300) are located respectively the both sides of rotating ring (110), first quiet ring (210) with second quiet ring (310) respectively with thereby two terminal surfaces of rotating ring (110) are contradicted to be connected and are formed bi-polar face and seal.

2. A double mechanical seal according to claim 1 wherein: still include seal receptacle assembly (400), first stationary ring seat (200) with second stationary ring seat (300) all are located in seal receptacle assembly (400), just first stationary ring seat (200) with second stationary ring seat (300) pass through the stop pin with seal receptacle assembly (400) is connected.

3. A double mechanical seal according to claim 2 wherein: a plurality of first springs (410) are installed in the seal seat assembly (400), and the first springs (410) are annularly arranged and are in abutting connection with the first stationary ring seat (200) so as to apply compensation force towards the direction of the movable ring (110) to the first stationary ring seat (200).

4. A double mechanical seal according to claim 2 or 3, wherein: a plurality of second springs (420) are installed in the sealing seat assembly (400), and each second spring (420) is annularly arranged and is in abutting connection with the second stationary ring seat (300) so as to apply compensation force towards the direction of the moving ring (110) to the second stationary ring seat (300).

5. A double mechanical seal according to claim 2 wherein: a lining ring (430) is arranged between one end, close to the first static ring seat (200), of the sealing seat assembly (400) and the shaft sleeve (100).

6. A double mechanical seal according to claim 5 wherein: the seal seat assembly (400) is provided with a first flushing channel (440), a second flushing channel (450) and a third flushing channel (460), the first flushing channel (440) is communicated with the position between the first static ring seat (200) and the seal seat assembly (400), the second flushing channel (450) is communicated with the position between the second static ring seat (300) and the seal seat assembly (400), and the third flushing channel (460) is communicated with the position between the lining ring (430) and the seal seat assembly (400).

7. A double mechanical seal according to claim 2 wherein: sealing rings are arranged between the first static ring seat (200) and the sealing seat assembly (400) and between the second static ring seat (300) and the sealing seat assembly (400).