CN211693526U - Shaft seal device of rotating machinery - Google Patents

Abstract

The utility model discloses a shaft sealing device for a rotating machine, which comprises a rotating shaft, a shaft sleeve is fixedly sleeved on the rotating shaft, a static ring seat is sleeved on the outside of the shaft sleeve, and the end of the static ring seat is sleeved. The packing packing is filled between the shaft sleeve and the packing, and the packing packing is pressed together by the gland, the gland is fixed on the static ring seat by the gland bolt, and the gland and the static ring seat are arranged between the gland and the static ring seat. There is a first sealing ring, a sealing cavity is arranged between the middle part of the static ring seat and the shaft sleeve, a static ring is fixed on the static ring seat in the sealing cavity, and a static ring is arranged between the static ring and the static ring seat. For the second sealing ring, the end surface of the static ring is provided with a first stepped portion. The utility model provides the packing packing, the static ring, the moving ring, the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring, and the packing seal is combined with the mechanical seal, so that the sealing performance of the shaft sealing device It has been greatly improved and can adapt to the needs of use in different occasions.

Description

A shaft seal device for rotating machinery

technical field

The utility model relates to the technical field of mechanical shaft seals, in particular to a shaft seal device of a rotating machine.

Background technique

For chemical equipment such as pumps and compressors, since the drive shaft runs through the outside of the equipment, there is a circumferential gap between the shaft and the equipment, and the medium in the equipment leaks inward or outward through the gap, so there must be a device to seal the gap. , This device is called a shaft seal. The shaft seal is used to prevent liquid leakage between the shaft and the bearing of the compressor or other fluid conveying equipment. It is also a sealing device set to prevent leakage between the pump shaft and the casing. The commonly used shaft seal types are Packing seals, mechanical seals and dynamic seals, if the shaft seal is improperly selected, not only need frequent maintenance during operation, and will leak a lot of liquid to be transported, but also may cause fire, explosion and poisoning due to the leakage of flammable, explosive and toxic liquids The accident and the consequences are unimaginable. Therefore, the shaft seal structure must be reasonably selected to ensure the safe operation of the pump. However, the existing shaft sealing device of the rotating machinery has a single sealing measure, the sealing effect is not ideal, and it is difficult to adapt to the needs of use in different occasions. It is necessary to improve the existing technology to solve the above problems.

Utility model content

(1) Technical problems solved

The purpose of the present utility model is to provide a shaft sealing device for rotating machinery, so as to solve the problem that the existing shaft sealing device for rotating machinery proposed in the above background technology has single sealing measures, unsatisfactory sealing effect, and is difficult to adapt to the use requirements in different occasions. The problem.

(2) Technical solutions

In order to achieve the above purpose, the utility model provides the following technical solutions: a shaft sealing device for a rotating machine, comprising a rotating shaft, a shaft sleeve is fixedly sleeved on the rotating shaft, and a static ring seat is sleeved on the outside of the shaft sleeve , the end of the static ring seat and the shaft sleeve are filled with packing packing, the packing packing is pressed together by the gland, the gland is fixed on the static ring seat by gland bolts, and the pressure A first sealing ring is arranged between the cover and the stationary ring seat, a sealing cavity is arranged between the middle part of the stationary ring seat and the shaft sleeve, a stationary ring is fixed on the stationary ring seat in the sealing cavity, and the stationary ring A second sealing ring is arranged between the static ring seat and the end surface of the static ring, a first stepped portion is arranged on the end surface of the static ring, a sealing ring groove is arranged on the first stepped portion, and a moving ring is arranged on the opposite side of the static ring , the end surface of the moving ring is provided with a second step part matched with the first step part, a third sealing ring is embedded on the second step part, and both the static ring and the moving ring are sleeved On the outside of the shaft sleeve, a fourth sealing ring is arranged between the movable ring and the shaft sleeve.

Preferably, there are three static rings and three moving rings, the three static rings are fixed on the static ring seat at equal intervals along the axial direction of the rotating shaft, and the three moving rings are equally spaced along the axial direction of the rotating shaft It is sleeved on the shaft sleeve, and the adjacent moving rings are connected by connecting screws, and the moving ring at the leftmost end is fixedly connected with one end of the spring, and the other end of the spring is fixedly connected with the spring seat. The seat is fixedly sleeved on the shaft sleeve by means of a set screw.

Preferably, there are eight said springs, and the eight said springs are evenly arranged around the shaft sleeve along the circumference.

Preferably, both ends of the shaft sleeve are provided with packing packings, and each end is provided with three packing packings, and the three packing packings are sequentially arranged from inside to outside as graphite braided packing, oil-immersed packing Asbestos braided packing and asbestos-impregnated PTFE braided packing.

Preferably, the sides of the packing packing are respectively provided with protrusions and grooves, and the adjacent packing packings are connected to each other through the cooperation of the protrusions and the grooves.

Preferably, a cooling water connecting pipe is arranged on the static ring seat, and the bottom end of the cooling water connecting pipe extends to the packing packing.

Preferably, two of the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are provided, and the two third sealing rings are respectively provided on different steps of the second step portion.

(3) Beneficial effects

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

(1) The utility model provides the packing packing, the static ring and the moving ring, and the packing seal is combined with the mechanical seal, so that the sealing performance of the shaft seal is greatly improved, so that the machine can work in different occasions.

(2) In the present invention, the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are arranged, so that between the gland and the static ring seat, between the static ring and the static ring seat, between the static ring and the static ring The sealing effect between the moving rings and between the moving rings and the shaft sleeve is better.

(3) The present utility model further improves the sealing effect of the shaft sealing device by arranging a plurality of static rings and a moving ring, and the plurality of static rings are matched with a plurality of moving rings, thereby avoiding damage to a single static ring or a moving ring, causing the shaft to be damaged. Seal failure problem.

Description of drawings

Fig. 1 is the front sectional view of the utility model;

Fig. 2 is an enlarged view of the structure at 1 in Fig. 1 of the utility model;

Fig. 3 is the sectional view at A-A in Fig. 1 of the utility model;

FIG. 4 is an enlarged view of the connection structure of the packing packing according to the present invention.

The reference symbols in the figure are: 1, rotating shaft; 2, shaft sleeve; 3, static ring seat; 4, packing packing; 5, gland; 6, gland bolt; 7, first sealing ring; 8, cooling 9. Sealing chamber; 10. Static ring; 11. Second sealing ring; 12. First step; 13. Sealing ring groove; 14. Moving ring; 15. Second step; 16. Third seal ring; 17, fourth sealing ring; 18, connecting screw; 19, spring; 20, spring seat; 21, set screw; 22, protrusion; 23, groove.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

1-4, an embodiment provided by the present invention: a shaft sealing device for a rotating machine, comprising a rotating shaft 1, a shaft sleeve 2 is fixedly sleeved on the rotating shaft 1, and the outer part of the shaft sleeve 2 is The sleeve is provided with a static ring seat 3, the static ring seat 3 is fixed on the equipment, a packing packing 4 is filled between the end of the static ring seat 3 and the shaft sleeve 2, and the packing packing 4 is pressed together by the gland 5, and the gland 5 is fixed on the static ring seat 3 by the gland bolts 6, and a first sealing ring 7 is arranged between the gland 5 and the static ring seat 3, and a sealing cavity 9 is arranged between the middle part of the static ring seat 3 and the shaft sleeve 2 , a static ring 10 is fixed on the static ring seat 3 in the sealing chamber 9, a second sealing ring 11 is arranged between the static ring 10 and the static ring seat 3, and a first stepped portion 12 is arranged on the end surface of the static ring 10, A sealing ring groove 13 is provided on a stepped portion 12 , a moving ring 14 is provided on the opposite side of the static ring 10 , and a second stepped portion 15 is provided on the end surface of the moving ring 14 , which is matched with the first stepped portion 12 . The second stepped portion 15 is embedded with a third sealing ring 16, the static ring 10 and the moving ring 14 are both sleeved on the outside of the shaft sleeve 2, when the rotating shaft 1 rotates, the moving ring 14 is driven to rotate, while the static ring 10 is stationary, In this way, the annular sealing surface of the movable ring 14 in contact with the stationary ring 10 prevents the leakage of the medium, and a fourth sealing ring 17 is arranged between the movable ring 14 and the shaft sleeve 2 .

There are three static rings 10 and three moving rings 14 . The three static rings 10 are fixed on the static ring seat 3 at equal intervals along the axial direction of the rotating shaft 1 , and the three moving rings 14 are sleeved at equal intervals along the axial direction of the rotating shaft 1 . On the shaft sleeve 2, the adjacent moving rings 14 are connected by the connecting screw 18, and the leftmost moving ring 14 is fixedly connected to one end of the spring 19, the other end of the spring 19 is fixedly connected to the spring seat 20, and the spring seat 20 passes through The set screw 21 is fixedly sleeved on the shaft sleeve 2. By arranging a plurality of static rings 10 and a moving ring 14, the plurality of static rings 10 cooperate with the plurality of moving rings 14, and the multi-stage mechanical seal further improves the performance of the shaft sealing device. sealing effect.

Eight springs 19 are provided, and the eight springs 19 are evenly arranged around the shaft sleeve 2 along the circumference. The force of the springs 19 makes the moving ring 14 press the static ring 10 tightly, and the arrangement of the multiple springs 19 ensures that the moving ring 14 The movement stability is better, and the moving ring 14 is not easy to shift.

Both ends of the shaft sleeve 2 are provided with packing packings 4, and the packing packings 4 at each end are provided with three pieces. The asbestos-impregnated PTFE braided packing and three different packing packings 4 are matched with each other, which is better than a single packing packing 4, and can meet the needs of different occasions.

The sides of the packing packing 4 are respectively provided with protrusions 22 and grooves 23. Adjacent packing packings 4 are connected to each other through the cooperation of the protrusions 22 and the grooves 23. The setting of the protrusions 22 and the grooves 23 makes the The packing packing 4 can be connected more closely, and it is not easy to deviate from each other.

The static ring seat 3 is provided with a cooling water pipe 8, the bottom end of the cooling water pipe 8 extends to the packing packing 4, and the cooling water cools the packing packing 4 through the cooling water pipe 8, so that the rotating shaft 1 can work for a long time .

There are two first sealing rings 7 , second sealing rings 11 , third sealing rings 16 and fourth sealing rings 17 , and the two third sealing rings 16 are respectively arranged on different steps of the second stepped portion 15 . A sealing ring 7 is between the gland 5 and the static ring seat 3, the second sealing ring 11 is between the static ring 10 and the static ring seat 3, the third sealing ring 16 is between the static ring 10 and the moving ring 14, the first The four sealing rings 17 make the sealing effect between the movable ring 14 and the shaft sleeve 2 better.

Working principle: when the rotating shaft 1 rotates, it drives the spring seat 20 and the moving ring 14 to rotate together. Due to the force of the spring 19, the moving ring 14 is tightly pressed on the static ring 10. The two stepped parts 15 are matched, and the annular sealing surface of the movable ring 14 in contact with the static ring 10 prevents the leakage of the medium. By arranging a plurality of static rings 10 and a plurality of moving rings 14, the plurality of static rings 10 are matched with the plurality of moving rings 14. , forming a plurality of annular sealing surfaces in which the moving ring 14 contacts the static ring 10 to further improve the sealing effect of the shaft sealing device. By setting the packing packing 4, the static ring 10 and the moving ring 14, the packing seal is combined with the mechanical seal , so that the sealing performance of the shaft seal is greatly improved, so that the machine can work in different occasions.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. A shaft seal device of a rotary machine, comprising a rotary shaft (1), characterized in that: the sealing device is characterized in that a shaft sleeve (2) is fixedly sleeved on the rotating shaft (1), a static ring seat (3) is sleeved outside the shaft sleeve (2), packing packings (4) are filled between the end part of the static ring seat (3) and the shaft sleeve (2), the packings (4) are pressed through a gland (5), the gland (5) is fixed on the static ring seat (3) through gland bolts (6), a first sealing ring (7) is arranged between the gland (5) and the static ring seat (3), a sealing cavity (9) is arranged between the middle part of the static ring seat (3) and the shaft sleeve (2), a static ring (10) is fixed on the static ring seat (3) in the sealing cavity (9), a second sealing ring (11) is arranged between the static ring (10) and the static ring seat (3), a first step part (12) is arranged on the end surface of the static ring (10), and a sealing ring groove (13) is arranged on the first step part (12), the opposite of quiet ring (10) is provided with rotating ring (14), be provided with on the terminal surface of rotating ring (14) with first step portion (12) matched with second step portion (15), the embedding is provided with third sealing washer (16) on second step portion (15), the outside at axle sleeve (2) is all established in quiet ring (10) and rotating ring (14), be provided with fourth sealing washer (17) between rotating ring (14) and axle sleeve (2).

2. The shaft sealing device of a rotary machine according to claim 1, wherein: quiet ring (10) and rotating ring (14) all are provided with threely, three quiet ring (10) are fixed on quiet ring seat (3) along the axial equidistant of axis of rotation (1), and are three rotating ring (14) are established on axle sleeve (2) along the axial equidistant cover of axis of rotation (1), and are adjacent connect through connecting screw (18) between rotating ring (14), and the leftmost end the one end fixed connection of rotating ring (14) and spring (19), the other end and spring holder (20) fixed connection of spring (19), spring holder (20) are established on axle sleeve (2) through holding screw (21) fixed cover.

3. The shaft sealing device of a rotary machine according to claim 2, wherein: eight springs (19) are arranged, and eight springs (19) are uniformly arranged around the shaft sleeve (2) along the circumference.

4. The shaft sealing device of a rotary machine according to claim 1, wherein: the packing is woven to the graphite that all is provided with at the both ends of axle sleeve (2), and every end packing (4) all are provided with three, three packing (4) from inside to outside sets gradually to the graphite weaves packing, oily asbestos weave packing and asbestos soaks the tetrafluoro and weave packing.

5. The shaft sealing device of a rotary machine according to claim 1, wherein: the side of packing (4) is provided with arch (22) and recess (23) respectively, and is adjacent between packing (4) through protruding (22) and recess (23) cooperation and mutual joint.

6. The shaft sealing device of a rotary machine according to claim 1, wherein: and the static ring seat (3) is provided with a cooling water connecting pipe (8), and the bottom end of the cooling water connecting pipe (8) extends to the packing (4).

7. The shaft sealing device of a rotary machine according to claim 1, wherein: the first sealing ring (7), the second sealing ring (11), the third sealing ring (16) and the fourth sealing ring (17) are all provided with two, and the two third sealing rings (16) are respectively arranged on different steps of the second step part (15).

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