CN215860949U

CN215860949U - Sealing device for large swing angle pump

Info

Publication number: CN215860949U
Application number: CN202122170674.4U
Authority: CN
Inventors: 不公告发明人
Original assignee: Liaoning Haoyu Machinery Manufacturing Co ltd
Current assignee: Liaoning Haoyu Machinery Manufacturing Co ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2022-02-18
Anticipated expiration: 2031-09-08

Abstract

The utility model discloses a sealing device for a large-swing-angle pump, which relates to the technical field of mechanical sealing and aims to solve the problem of small compensation angle of the mechanical sealing for the existing pump, and comprises a static ring and a dynamic ring which are coaxial and sequentially arranged, wherein a gland is sleeved on the outer wall surface of the static ring and is connected with the static ring through a first elastic piece, the telescopic direction of the first elastic piece is parallel to the axial direction of the static ring to compensate the static ring, and a first O-shaped sealing ring is arranged between the gland and the static ring to form radial sealing; the rotating ring with quiet ring laminating, the rotating ring deviates from the one end of quiet ring is provided with compensation assembly, be provided with second O type sealing washer on the rotating ring in order to seal.

Description

Sealing device for large swing angle pump

Technical Field

The utility model relates to the technical field of mechanical sealing, in particular to a sealing device for a large-swing-angle pump.

Background

The mechanical seal installation and use requirements are strict relative to the packing seal installation and use, the compensation angle of the common mechanical seal is small, and the mechanical seal installation and use requirements have strict requirements on the position degree of a pump seal cavity and the pump shaft jumping. For example, the radial runout of the pump shaft is not more than 0.1mm, the perpendicularity of the pump cavity spigot end face relative to the pump shaft is not more than 0.05mm, and the normal operation state of the seal is influenced when the pump cavity spigot end face exceeds a specified range, so that the mechanical seal is leaked and failed.

In actual use, due to various reasons (such as larger bearing clearance, bent pump shaft and the like) and small compensation angle, the exceeding phenomenon often occurs, so that the mechanical seal is leaked and failed in advance.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, namely the problem that the conventional mechanical seal for the pump has a small compensation angle, the utility model provides a sealing device for a large-swing-angle pump, which comprises a static ring and a dynamic ring which are coaxially and sequentially arranged, wherein a gland is sleeved on the outer wall surface of the static ring and is connected with the static ring through a first elastic element, the expansion direction of the first elastic element is parallel to the axial direction of the static ring so as to compensate the static ring, and a first O-shaped sealing ring is arranged between the gland and the static ring so as to form radial seal;

the rotating ring with quiet ring laminating, the rotating ring deviates from the one end of quiet ring is provided with compensation assembly, be provided with second O type sealing washer on the rotating ring in order to seal.

Through adopting above-mentioned technical scheme, first elastic component and first O type sealing washer compensate to the quiet ring, and the compensation of cooperation compensating assembly realizes the two side compensation of pump shaft for sealed operation in-process is more stable, can not produce because of the compensation factor and leak.

The utility model is further provided with: the first elastic piece is provided with two end heads, wherein one end head is fixedly connected with the inner wall surface of the gland, and the other end head is fixedly connected with the static ring.

The utility model is further provided with: the compensation assembly comprises a push ring, a second elastic piece and a base, two ends of the second elastic piece are fixedly connected with the push ring and the base respectively, the telescopic direction of the second elastic piece is parallel to the axial direction of the moving ring so as to compensate the moving ring, and the inner wall surface of the push ring is attached to the moving ring when the second elastic piece is not stressed.

The utility model is further provided with: the inner wall of the gland is in a step shape, the static ring is in an L-shaped arrangement, the gland is attached to the static ring to form a rectangular space, and the first O-shaped sealing ring is arranged in the rectangular space.

Through adopting above-mentioned technical scheme, radial seal of quiet ring department is guaranteed to first O type sealing washer.

The utility model is further provided with: the first elastic piece adopts a spring.

The utility model is further provided with: the second elastic piece adopts a spring.

The utility model is further provided with: the second O-shaped sealing ring is arranged in a space formed by the inner wall surface of the movable ring, the push ring and the pump shaft in a surrounding mode.

Through adopting above-mentioned technical scheme, second O type sealing washer seals the rotating ring.

The beneficial technical effects of the utility model are as follows:

1. a first elastic part is additionally arranged in a space where the static ring is attached to the gland, and the first elastic part compensates the deviation of the static ring, so that the leakage caused by overlarge swing angle of the pump shaft is avoided;

2. a first O-shaped sealing ring is arranged in a rectangular space formed by enclosing the static ring and the gland so as to ensure the sealing effect of the static ring;

3. the second O-shaped sealing ring seals leakage points between the movable ring and the pump shaft, and the compensation assembly further provides compensation for the movable ring and the static ring.

Drawings

Fig. 1 shows a schematic structural diagram of a sealing device for a large swing angle pump according to the present invention.

Reference numerals: 1. a stationary ring; 2. a moving ring; 31. a first elastic member; 32. a first O-ring seal; 41. a second elastic member; 42. a second O-ring seal; 43. a push ring; 44. a base; 5. and (7) pressing the cover.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

Referring to fig. 1, the utility model provides a sealing device for a large-swing-angle pump, which is used in cooperation with a pump shaft and comprises a stationary ring 1 and a movable ring 2 which are coaxially and sequentially arranged, wherein the stationary ring 1 and the movable ring 2 are coaxially arranged with the pump shaft, the inner wall surface of the movable ring 2 is attached to the pump shaft, and the stationary ring 1 and the movable ring 2 can slightly slide on the pump shaft.

The outer wall surface of the static ring 1 is sleeved with a gland 5, the inner wall surface of the gland 5 is in a step-shaped arrangement, the static ring 1 is in an L-shaped arrangement, one end of the static ring extends into the gland 5, the extending part of the static ring 1 is a rectangular block, and two opposite wall surfaces of the static ring 1 are respectively attached to the inner wall surface of the gland 5 and the pump shaft.

The inner wall surface of the gland 5 is provided with a first elastic member 31, and the gland 5 is in transmission connection with the extending end of the stationary ring 1 through the first elastic member 31. The first elastic member 31 has two ends, and the first elastic member 31 is used as a spring for explanation in this application, one end of the first elastic member 31 is welded and fixed to the inner wall surface of the gland 5, the other end of the first elastic member 31 is welded and fixed to the extending end of the stationary ring 1, and the length direction and the extending direction of the first elastic member 31 are both parallel to the axial direction of the stationary ring 1 (i.e., the axial direction of the pump shaft).

Quiet ring 1 encloses with gland 5 and closes and form the rectangle space, the rectangle space has a certain distance with the pump shaft, be provided with first O type sealing washer 32 in the rectangle space, the pump shaft can drive quiet ring 1 and extrude first O type sealing washer 32 when rocking, first elastic component 31 contracts simultaneously, and first elastic component 31 can provide quiet ring 1 compensation effort to with quiet ring 1 push to the position of quiet ring 1 when initial unstressed, realize the compensation of first elastic component 31 to quiet ring 1.

One side that the rotating ring 2 deviates from the stationary ring 1 is provided with a compensation assembly, and the rotating ring 2 is attached to the stationary ring 1 through the compensation assembly. The compensation assembly includes a second elastic member 41, a push ring 43, and a base 44, wherein the base 44 is fixed on the pump shaft to bear the acting force of the second elastic member 41, and the base 44 is U-shaped to prevent the second elastic member 41 from separating from the base 44. The push ring 43 is L-shaped and the inner wall surface thereof is attached to the end of the movable ring 2 departing from the stationary ring 1. The second elastic member 41 has two ends, and the second elastic member 41 is used as a spring for explanation in this application, and two ends of the second elastic member 41 are respectively and fixedly connected with the base 44 and the push ring 43, and the extending direction of the second elastic member 41 is parallel to the axial direction of the moving ring 2, and the second elastic member is used for compensating the moving ring 2, and meanwhile, the compensating force acts on the first elastic member 31, so that the static ring 1 is further compensated, and the dual compensation of the static ring 1 is realized.

The parameters of the product of the utility model in the using process are recorded as follows:

the pump shaft is in radial run-out: not more than 0.2 mm;

the pump cavity spigot end face is vertical to the pump shaft: not more than 0.2 mm;

linear velocity: not more than 15 m/s. In summary, the first elastic part 31 is additionally arranged in the space after the static ring 1 is attached to the gland 5, and the first elastic part 31 compensates the deviation of the static ring 1, so that the leakage caused by overlarge swing angle of the pump shaft is avoided;

a first O-shaped sealing ring 32 is arranged in a rectangular space formed by the static ring 1 and the gland 5 in an enclosing manner so as to ensure the sealing effect of the static ring 1;

the second O-ring 42 seals the leak between the rotating ring 2 and the pump shaft, while the compensating assembly further provides compensation for the rotating ring 2 and the stationary ring 1.

While the utility model has been described with reference to a preferred embodiment, various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model, and particularly, features shown in the various embodiments may be combined in any suitable manner without departing from the scope of the utility model. It is intended that the utility model not be limited to the particular embodiments disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings, which are for convenience of description only, and do not indicate or imply that the devices or elements 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.

Furthermore, it should be noted that, in the description of the present invention, 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The terms "comprises," "comprising," or any other similar term are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the utility model, and the technical scheme after the changes or substitutions can fall into the protection scope of the utility model.

Claims

1. The utility model provides a sealing device for large pivot angle pump which characterized in that: the sealing device comprises a static ring (1) and a dynamic ring (2) which are coaxial and sequentially arranged, wherein a gland (5) is sleeved on the outer wall surface of the static ring (1), the gland (5) is connected with the static ring (1) through a first elastic piece (31), the telescopic direction of the first elastic piece (31) is parallel to the axial direction of the static ring (1) so as to compensate the static ring (1), and a first O-shaped sealing ring (32) is arranged between the gland (5) and the static ring (1) so as to form radial sealing;

the rotating ring (2) is attached to the static ring (1), the rotating ring (2) deviates from one end of the static ring (1) and is provided with a compensation assembly, and a second O-shaped sealing ring (42) is arranged on the rotating ring (2) to seal.

2. The sealing device for a large swing angle pump according to claim 1, wherein: the first elastic piece (31) is provided with two ends, wherein one end is fixedly connected with the inner wall surface of the gland (5), and the other end is fixedly connected with the static ring (1).

3. The seal device for a large swing angle pump according to claim 1 or 2, characterized in that: the compensation assembly comprises a push ring (43), a second elastic piece (41) and a base (44), two ends of the second elastic piece (41) are fixedly connected with the push ring (43) and the base (44) respectively, the telescopic direction of the second elastic piece (41) is parallel to the axial direction of the movable ring (2) so as to compensate the movable ring (2), and the inner wall surface of the push ring (43) is attached to the movable ring (2) when the second elastic piece (41) is not stressed.

4. The sealing device for a large swing angle pump according to claim 1, wherein: the inner wall surface of the gland (5) is in a step shape, the static ring (1) is in an L shape, the gland (5) and the static ring (1) are attached to form a rectangular space, and the first O-shaped sealing ring (32) is arranged in the rectangular space.

5. The sealing device for a large swing angle pump according to claim 2, wherein: the first elastic piece (31) adopts a spring.

6. The sealing device for a large swing angle pump according to claim 3, wherein: the second elastic piece (41) adopts a spring.

7. The sealing device for a large swing angle pump according to claim 3, wherein: the second O-shaped sealing ring (42) is arranged in a space formed by the inner wall surface of the movable ring (2), the push ring (43) and the pump shaft in a surrounding mode.