CN217927134U

CN217927134U - Double-end-face mechanical sealing element

Info

Publication number: CN217927134U
Application number: CN202221576786.8U
Authority: CN
Inventors: 王斌; 俞旭腾; 张�浩
Original assignee: Ningbo Anmu Sealing Technology Co ltd
Current assignee: Ningbo Anmu Sealing Technology Co ltd
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2022-11-29
Anticipated expiration: 2032-06-22

Abstract

The utility model relates to a mechanical seal technical field discloses a double mechanical seal spare, include: the shell and the gland are connected and surround to form an accommodating cavity; the rotating shaft penetrates through the accommodating cavity and is provided with a shaft sleeve; the static assembly comprises a first static ring and a second static ring, and the first static ring and the second static ring are arranged in the accommodating cavity at intervals; the movable assembly comprises a first movable ring and a second movable ring; first rotating ring and second rotating ring all overlap and establish on the axle sleeve to set up between first quiet ring and the quiet ring of second, and first rotating ring and the laminating of first quiet ring, the laminating of second rotating ring and the quiet ring of second. The utility model has the advantages of, through the laminating of first rotating ring and first quiet ring, the laminating of the quiet ring of second and second forms twice and seals sealed face, can promote sealed effect, and it is when sealed face became invalid together, and another sealed face still can play sealed effect, can effectively prevent to reveal.

Description

Double-end-face mechanical sealing element

Technical Field

The utility model relates to a mechanical seal technical field refers in particular to a double mechanical seal spare.

Background

Mechanical seals are widely used in pumps, compressors, and mixing machines. The leakage path between a rotating part (such as a shaft) and a static structure cavity is cut off, and harmful media in the cavity are prevented from leaking to the outside. The mechanical seal generally consists of a moving component fixed to the shaft and a stationary component fixed to the chamber; the traditional mechanical sealing element is usually sealed by the joint of a static ring and a dynamic ring, and the sealing effect is poor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses having considered aforementioned problem and having made, utility model's purpose provides a double mechanical seal spare, it seals through twice sealed face, can promote sealed effect, prevents to reveal.

In order to achieve the above object, the utility model provides a double mechanical seal, include:

the shell and the gland are connected, and form an accommodating cavity in a surrounding manner;

the rotating shaft penetrates through the accommodating cavity and is provided with a shaft sleeve;

the static assembly comprises a first static ring and a second static ring, and the first static ring and the second static ring are arranged in the accommodating cavity at intervals;

the movable assembly comprises a first movable ring and a second movable ring; the first rotating ring and the second rotating ring are sleeved on the shaft sleeve, and are arranged between the first static ring and the second static ring, the first rotating ring is attached to the first static ring, and the second rotating ring is attached to the second static ring.

According to the double-end-face mechanical sealing element, the movable assembly further comprises a spiral spring, and the spiral spring is arranged between the first movable ring and the second movable ring.

According to the double mechanical seal, the spiral springs are arranged in a plurality, and the spiral springs are arranged around the circumferential direction of the rotating shaft.

According to the double-end-face mechanical sealing element, the shaft sleeve is provided with the anti-rotation pin; one end of the anti-rotation pin is inserted into the first rotating ring, and the other end of the anti-rotation pin is inserted into the second rotating ring.

According to the double-end-face mechanical seal, the anti-rotation pins are arranged in plurality; the plurality of the anti-rotation pins are arranged around the circumference of the rotating shaft.

According to the double-end-face mechanical sealing element, the first movable ring and the second movable ring are both provided with the sealing grooves, the sealing grooves are internally provided with the first sealing rings, and the first sealing rings are abutted to the shaft sleeve.

According to the double-end-face mechanical sealing element, the shaft sleeve is provided with the limiting groove, and the first sealing ring can be clamped in the limiting groove.

According to the double-end-face mechanical sealing element, the pressure cover is provided with a plurality of flushing holes communicated with the accommodating cavity, and the flushing holes are arranged around the circumferential direction of the rotating shaft.

According to a double mechanical seal spare, be provided with the leather cup on the casing, first quiet ring setting is in on the leather cup, be provided with quiet ring seat on the gland, the quiet ring setting of second is in on the quiet ring seat, just the quiet ring of second with be provided with the second sealing washer between the quiet ring seat.

According to the double-end-face mechanical seal, the shell and the gland are connected through threads.

The utility model discloses following beneficial effect has:

1. the first movable ring is attached to the first static ring, and the second movable ring is attached to the second static ring to form two sealing surfaces for sealing, so that the sealing effect can be improved, when one sealing surface fails, the other sealing surface can still play a role in sealing, and leakage can be effectively prevented;

2. the spiral spring is arranged between the first movable ring and the second movable ring, so that on one hand, the sealing effect of the mechanical sealing element can be ensured, and meanwhile, the pressure of two sealing surfaces can be consistent all the time by the spiral spring, and the service life of the mechanical sealing element is prolonged;

3. the rotating shaft drives the first rotating ring and the second rotating ring to rotate simultaneously through the anti-rotating pin on the shaft sleeve, so that the synchronism of the rotation of the first rotating ring and the second rotating ring can be ensured, and the relative sliding between the rotating ring and the shaft sleeve can be avoided;

4. be provided with a plurality of flushing holes on the casing, the flush fluid can hold the chamber through the injection of flushing hole, and continuous washs sealed face, makes it keep lubricated, avoids sealed inefficacy, can also take away this mechanical seal's heat simultaneously, improves this mechanical seal's life.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is an enlarged view of fig. 1 at a.

In the figure: 100. a housing; 110. a leather cup; 120. a backing ring; 200. a gland; 210. a stationary ring seat; 211. a second seal ring; 220. flushing the hole; 300. a rotating shaft; 310. a shaft sleeve; 311. an anti-rotation pin; 312. a limiting groove; 410. a first stationary ring; 420. a second stationary ring; 500. a movable component; 510. a first rotating ring; 511. a rotating ring body; 512. a movable ring seat; 513. a sealing groove; 514. a first seal ring; 520. a second rotating ring; 530. a coil spring.

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. 1-2, a double mechanical seal includes a housing 100 and a gland 200 joined together, a shaft 300, a stationary assembly and a moving assembly 500. The housing 100 and the gland 200 surround to form a containing cavity; the rotating shaft 300 penetrates through the accommodating cavity, and a shaft sleeve 310 is arranged on the rotating shaft 300; the static component comprises a first static ring 410 and a second static ring 420, and the first static ring 410 and the second static ring 420 are arranged in the accommodating cavity at intervals; the movable assembly 500 comprises a first movable ring 510 and a second movable ring 520; the first movable ring 510 and the second movable ring 520 are sleeved on the shaft sleeve 310 and are arranged between the first static ring 410 and the second static ring 420, the first movable ring 510 is attached to the first static ring 410, and the second movable ring 520 is attached to the second static ring 420; the first rotating ring 510 and the second rotating ring 520 are sleeved on the shaft sleeve 310 of the rotating shaft 300 and then rotate together with the rotating shaft 300, the shaft sleeve 310 can reduce the abrasion of the rotating shaft 300, and the service life of the mechanical sealing element is prolonged. Through the laminating of first rotating ring 510 and first quiet ring 410, the laminating of second rotating ring 520 and second quiet ring 420 forms twice sealed face and seals, can promote sealed effect, and it is when sealed face became invalid together, and another sealed face still can play sealed effect, can effectively prevent to reveal.

The movable assembly 500 further includes a coil spring 530, and the coil spring 530 is disposed between the first movable ring 510 and the second movable ring 520. The spiral spring 530 can provide a thrust force to drive the first movable ring 510 to be attached to the first stationary ring 410, and simultaneously drive the second movable ring 520 to be attached to the second stationary ring 420, so that the sealing effect of the mechanical sealing element is ensured, and the spiral spring 530 can enable the pressure of two sealing surfaces to be consistent all the time, so that the service life of the mechanical sealing element is prolonged. The plurality of coil springs 530 are provided, and the plurality of coil springs 530 are provided around the circumference of the rotary shaft 300, which can provide a larger pushing force, further ensuring the sealing effect of the mechanical seal.

In this embodiment, the first rotating ring 510 and the second rotating ring 520 both include a rotating ring body 511 and a rotating ring seat 512, and the rotating ring seat 512 is sleeved on the shaft sleeve 310; the rotating ring body 511 is disposed on the rotating ring seat 512 and is attached to the stationary ring. The manufacturing precision of the movable ring body 511 is higher than that of the movable ring seat 512, and the movable ring body 511 is sleeved on the shaft sleeve 310 through the movable ring seat 512, so that the manufacturing cost of the mechanical sealing element can be reduced.

The shaft sleeve 310 is provided with an anti-rotation pin 311; one end of the anti-rotation pin 311 is inserted into the first rotating ring 510, and the other end is inserted into the second rotating ring 520. The rotating shaft 300 drives the first rotating ring 510 and the second rotating ring 520 to rotate simultaneously through the rotation preventing pins 311 on the shaft sleeve 310, which can ensure the simultaneity of the rotation of the first rotating ring 510 and the second rotating ring 520, and can prevent the rotating rings from sliding relative to the shaft sleeve 310. Preferably, the rotation preventing pin 311 is provided in plurality; a plurality of rotation preventing pins 311 are provided around the circumferential direction of the rotary shaft 300.

The first rotating ring 510 and the second rotating ring 520 are both provided with a sealing groove 513, a first sealing ring 514 is arranged in the sealing groove 513, and the first sealing ring 514 is abutted against the shaft sleeve 310. It can seal the position where the movable ring is connected with the shaft sleeve 310, and ensure the sealing effect of the mechanical sealing element.

The shaft sleeve 310 is provided with a limiting groove 312, and the first sealing ring 514 can be clamped in the limiting groove 312. When the rotating ring and the stationary ring at the two ends are worn to a certain degree, the first sealing ring 514 can be clamped into the limiting groove 312, so that the position of the rotating ring is limited.

The casing 100 is provided with a leather cup 110, the first stationary ring 410 is arranged on the leather cup 110, the gland 200 is provided with a stationary ring seat 210, the second stationary ring 420 is arranged on the stationary ring seat 210, and a second sealing ring 211 is arranged between the second stationary ring 420 and the stationary ring seat 210. The packing cup 110 can ensure the sealing performance of the joint of the first stationary ring 410 and the casing 100, and the second sealing ring 211 can ensure the sealing performance between the second stationary ring 420 and the stationary ring seat 210.

The pressing cover 200 is provided with a plurality of washing holes 220 each communicating with the receiving chamber, and the plurality of washing holes 220 are arranged around the circumference of the rotation shaft 300. Preferably, there are two flushing holes 220, and flushing liquid can enter the accommodating cavity through one of the flushing holes 220 and be discharged from the other flushing hole 220; flushing liquid can be injected into the containing cavity through the flushing hole 220, the sealing surface is continuously cleaned, so that the sealing surface is kept lubricated, sealing failure is avoided, meanwhile, the heat of the mechanical sealing element can be taken away, and the service life of the mechanical sealing element is prolonged.

In the present embodiment, a part of the flushing hole 220 is opened on the casing 100, and another part is opened on the stationary ring seat 210; the inner side of the shell 100 is provided with a backing ring 120, and the backing ring 120 can change the flow direction of the flushing liquid entering the accommodating cavity, so that the flushing and cooling effects are ensured.

The housing 100 and the gland 200 are connected by screw threads, and are installed in a screw thread connection manner, so that the installation process is simple and convenient.

This scheme provides a mechanical seal, including casing 100 and gland 200, pivot 300, quiet ring assembly and the rotating ring subassembly that meets. Through the laminating of first rotating ring 510 and first quiet ring 410, the laminating of second rotating ring 520 and second quiet ring 420 forms twice sealed face and seals, and sealed effect is better, and it is when sealed face became invalid together, and another sealed face still can play sealed effect, can effectively prevent to reveal.

The technical solutions of the present invention have been described in detail with reference to the accompanying drawings, and the described embodiments are used to help understand the ideas of the present invention. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the claims.

It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) 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 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 specifically limited 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 connected internally or in any other suitable relationship, unless expressly stated otherwise. 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.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A double mechanical seal, comprising:

the movable assembly comprises a first movable ring and a second movable ring; the first rotating ring and the second rotating ring are sleeved on the shaft sleeve and are arranged between the first static ring and the second static ring, the first rotating ring is attached to the first static ring, and the second rotating ring is attached to the second static ring.

2. A double mechanical seal according to claim 1, wherein said dynamic assembly further comprises a coil spring disposed between said first dynamic ring and said second dynamic ring.

3. A double mechanical seal according to claim 2, wherein the coil spring is provided in plurality, and a plurality of the coil springs are provided around a circumference of the rotary shaft.

4. A double mechanical seal according to claim 1, wherein an anti-rotation pin is provided on the shaft sleeve; one end of the anti-rotation pin is inserted into the first rotating ring, and the other end of the anti-rotation pin is inserted into the second rotating ring.

5. A double mechanical seal according to claim 4, wherein the anti-rotation pin is provided in plurality; the rotation preventing pins are arranged around the circumference of the rotating shaft.

6. A double mechanical seal according to claim 1, wherein each of the first and second rotating rings has a seal groove, and a first seal ring is disposed in the seal groove and abuts against the sleeve.

7. A double mechanical seal according to claim 6, wherein a retaining groove is provided on the sleeve, and the first seal ring is receivable in the retaining groove.

8. A double mechanical seal according to claim 1, wherein a plurality of flushing holes are provided in the gland, each of the flushing holes communicating with the receiving cavity, the plurality of flushing holes being provided around the circumference of the shaft.

9. A double mechanical seal according to claim 1, wherein a cup is provided on the housing, the first stationary ring is provided on the cup, a stationary ring seat is provided on the gland, the second stationary ring is provided on the stationary ring seat, and a second seal ring is provided between the second stationary ring and the stationary ring seat.

10. A double mechanical seal according to claim 1, wherein said housing and said gland are threadably connected.