CN211852255U

CN211852255U - Mechanical sealing device for front pump of power plant

Info

Publication number: CN211852255U
Application number: CN202020169310.7U
Authority: CN
Inventors: 卞鹏; 其他发明人请求不公开姓名
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-14
Filing date: 2020-02-14
Publication date: 2020-11-03
Anticipated expiration: 2030-02-14

Abstract

The utility model provides a leading pump of power plant is with mechanical seal device belongs to power plant equipment application technical field, and this leading pump of power plant is with mechanical seal device includes the bearing, bearing circumference inner wall is provided with the axle sleeve sealing ring, and bearing circumference outer wall has cup jointed the rotating ring sealing ring, and bearing circumference outer wall has cup jointed the spring, and bearing circumference outer wall is close to spring department and has cup jointed the spring shim, bearing circumference outer wall has cup jointed the holding ring. The sealing ring of the shaft sleeve ensures the sealing performance when the inner wall of the bearing is connected with other articles; the elasticity of the whole device is enhanced by arranging the spring; the spring gasket is arranged, so that the elastic force of the buffer spring can be buffered; the positioning ring is arranged to play a role in determining the running track of the spring; the static ring sealing ring is arranged, so that the sealing performance of the static ring is enhanced; through being provided with the gland for quiet ring can be fixed, through being provided with the fixed axle, makes the gland can be fixed.

Description

Mechanical sealing device for front pump of power plant

Technical Field

The utility model belongs to the technical field of power plant equipment uses, concretely relates to leading pump of power plant is with mechanical seal device.

Background

In the prior art, the pre-pump configuration: 1. a pump body: the water inlet pipe and the water outlet pipe are both cast on the lower pump body, the water inlet and the water outlet are connected by flanges and horizontally enter and exit, the pump body can not be moved when the pump is overhauled, or the water inlet pipe and the water outlet pipe can not be removed, the hydraulic flow channel is of a double volute type, the pump body is made of ZG25, the lower part of the pump body is provided with a guide key, so that the pump body freely expands along the guide key, and the upper cover of the pump body is provided with. 2. A rotor: (1) the pump shaft is made of stainless steel forgings, the round angle and the chamfer angle R are strictly controlled, the coaxiality is less than 0.025mm, and the surface of the bearing is plated with chrome. (2) The hydraulic part adopts a single-stage impeller and a double-suction impeller, stainless steel is precisely poured, the hydraulic part and a wear ring of a pump shell adopt single-gap sealing, the axial position is determined by nuts of hubs at two ends of the impeller, the impeller can be positioned on the central line of the volute, in order to prevent axial back-and-forth movement, the outlet of the impeller is processed into an oblique opening, and a rotor is always subjected to axial force pointing to a transmission end. 3. Bearing: (1) sliding bearing: a thin-wall black-gold cylindrical sliding radial bearing is adopted, a bidirectional tilting type thrust bearing is added at the free end, a thrust pad bears axial force, oil is forced to be lubricated in a circulating way, and the axial clearance of the thrust pad is 0.3-0.5 mm, so that no axial displacement exists. (2) Rolling bearing: the transmission end adopts one single-row centripetal short cylindrical roller bearing; two single-row circular cone roller bearings are adopted at the free end, back-to-back installation is carried out, axial clearance is guaranteed to be 0.15-0.25 mm during installation, and shaft ends are sealed through oil cup thin oil lubrication (3): the balance type mechanical seal is adopted, a cooling water jacket is arranged in a pump shell to cool hot water leaked from the inside of the pump, so that the water temperature of a mechanical seal chamber is reduced, a moving ring adopts graphite, a stationary ring adopts high-nickel cast iron, a cooling groove is formed in the back of the stationary ring, the stationary ring is cooled by condensed water or industrial water, and a path of the condensed water with the diameter of phi 15 multiplied by 2.5 is arranged on the end faces of the moving ring and the stationary ring, so that the temperature of the moving ring and the stationary ring is reduced, and the service life of the mechanical. When the front pump is used, a mechanical sealing device for the front pump is needed.

Through retrieval discovery, the Chinese patent with the publication number of CN206449001U discloses a mechanical sealing device for a power plant pre-pump, which comprises a pump body and a static ring gland fixedly arranged on the shaft body and penetrating through the end faces of two sides of the pump body through a fixing bolt, wherein a sealing rubber ring is fixed on the surface of the shaft body at the joint of the shaft body and the pump body in a clamping manner, a static ring is arranged on the inner side of the static ring gland, a movable ring is connected with one side end face of the static ring, the top end face of the movable ring is laminated with an upper spring seat, the bottom of the upper spring seat is positioned on the surface of the sealing rubber ring, a lower spring seat is arranged on the surface of the sealing rubber ring, a spring is arranged between the lower spring seat and the upper spring seat, two ends of the spring are respectively fixed on a spring baffle plate positioned on the bottom end face of the upper spring seat and a central joint plate positioned on one side of, and the sealing rubber ring is closely attached to the outer side surface of the end part of the static ring gland, the basic sealing of the device is realized through the sealing rubber ring, a gap between the static ring and the static ring gland is filled with the static ring sealing ring, and the static ring sealing ring, the static ring and the static ring gland are in interference fit, so that the sealing performance of the device is improved.

However, in the technical scheme, the sealing ring is relatively soft and has small strength, so that the sealing ring is easy to damage, and the problem that the sealing ring is easy to damage also exists.

Disclosure of Invention

An object of the utility model is to provide a leading pump of power plant is with mechanical seal device aims at solving the problem that the sealing washer among the prior art easily harms.

In order to achieve the above object, the utility model provides a following technical scheme: the bearing comprises a bearing body, wherein a shaft sleeve sealing ring is arranged on the inner wall of the circumference of the bearing body, and a movable ring sealing ring is sleeved on the outer wall of the circumference of the bearing body.

In order to strengthen the elasticity of the whole device, as the utility model relates to an it is preferred, bearing circumference outer wall has cup jointed the spring, and bearing circumference outer wall is close to spring department and has cup jointed the spring shim.

In order to determine the running track of the spring, the outer wall of the circumference of the bearing is preferably sleeved with a positioning ring.

In order to strengthen the leakproofness of quiet ring, as the utility model relates to an it is preferred, bearing circumference outer wall is close to rotating ring sealing ring department and has closely cup jointed quiet ring, and quiet ring one side outer wall has closely cup jointed quiet ring sealing ring.

In order to make the quiet ring can fix, conduct the utility model relates to an it is preferred, bearing circumference outer wall is close to spring shim department and has cup jointed the gland.

In order to make the gland can be fixed with the external world, conduct the utility model relates to an it is preferred, gland circumference inner wall has cup jointed the rotating ring, and gland circumference outer wall is opened there is the screw hole, is provided with the fixed axle in the screw hole, three fixed orifices that gland one side outer wall was opened and is had the equidistance and distribute.

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

1. through the arrangement of the shaft sleeve sealing ring, the sealing performance of the inner wall of the bearing when the inner wall of the bearing is connected with other articles is guaranteed.

2. The elasticity of the whole device is enhanced by arranging the spring; the spring gasket is arranged, so that the elastic force of the buffer spring can be buffered; the positioning ring is arranged to determine the running track of the spring.

3. The static ring sealing ring is arranged, so that the sealing performance of the static ring is enhanced; the effect of connecting the fixed shaft is achieved by arranging the screw holes; the static ring is fixed by arranging the gland; the gland can be fixed with the outside by arranging the fixing hole; through being provided with the fixed axle for the gland can be fixed.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the present invention in a partial cross-sectional structure;

fig. 2 is a schematic view of the structure of the present invention;

fig. 3 is a schematic top view of the present invention;

in the figure: 1-a bearing; 2-shaft sleeve sealing ring; 3-a screw hole; 4-moving ring; 5-a movable ring sealing ring; 6-static ring sealing ring; 7-stationary ring; 8-a spring washer; 9-a spring; 10-a positioning ring; 11-a fixed shaft; 12-a gland; 13-fixing the hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.

Example 1

Referring to fig. 1-3, the present invention provides the following technical solutions: the bearing comprises a bearing 1, wherein a shaft sleeve sealing ring 2 is arranged on the inner wall of the circumference of the bearing 1, and a movable ring sealing ring 5 is sleeved on the outer wall of the circumference of the bearing 1.

The utility model discloses an in the embodiment, through the setting of axle sleeve sealing ring 2, leakproofness when having guaranteed that bearing 1 inner wall is connected with other article.

Specifically, the outer wall of the circumference of the bearing 1 is sleeved with a spring 9, and the outer wall of the circumference of the bearing 1, which is close to the spring 9, is sleeved with a spring gasket 8.

In this embodiment: through being provided with spring 9, strengthened the elasticity of integrated device, through being provided with spring shim 8, can reach the effect of buffer spring elasticity.

Specifically, the positioning ring 10 is tightly sleeved on the outer circumferential wall of the bearing 1.

In this embodiment: the positioning ring 10 is arranged to determine the running track of the spring.

Specifically, the outer wall of the circumference of the bearing 1, which is close to the movable ring sealing ring 5, is tightly sleeved with a stationary ring 7, and the outer wall of one side of the stationary ring 7 is tightly sleeved with a stationary ring sealing ring 6.

In this embodiment: by providing the stationary ring seal ring 6, the sealing performance of the stationary ring 7 is enhanced.

Specifically, the gland 12 has been cup jointed to 1 circumference outer wall of bearing near 8 departments of spring shim, and the rotating ring 4 has been cup jointed to 12 circumference inner walls of gland, and 12 circumference outer walls of gland are opened there is screw hole 3, are provided with fixed axle 11 in the screw hole 3, three fixed orifices 13 that the equidistance distributes are opened to 12 one side outer walls of gland.

In this embodiment: through being provided with screw hole 3, reach the effect of connecting fixed axle 11, through being provided with gland 12 for quiet ring 7 can be fixed, through setting up fixed orifices 13, makes gland 12 can be fixed with the external world, through being provided with fixed axle 11, makes gland 12 can be fixed.

The utility model discloses a theory of operation and use flow: firstly, after a static ring density ring 6 is sleeved on a static ring 7, the static ring 7 is sleeved on a bearing 1, then a moving ring sealing ring 5 is placed on the inner wall of a moving ring 4, the moving ring 4 is sleeved on the bearing 1, a gland 12 is sleeved on the outer wall of the static ring 7, the gland 12 is fixed through a fixed shaft 11, then a spring 9 is sleeved on a positioning ring 10, and finally a fixing ring is sleeved on the bearing 1.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a power plant is mechanical seal device for pre-pump which characterized in that: the bearing comprises a bearing (1), wherein a shaft sleeve sealing ring (2) is arranged on the inner wall of the circumference of the bearing (1), and a movable ring sealing ring (5) is sleeved on the outer wall of the circumference of the bearing (1).

2. A power plant pre-pump mechanical seal arrangement according to claim 1, wherein: the outer wall of the circumference of the bearing (1) is sleeved with a spring (9), and a spring gasket (8) is sleeved at the position, close to the spring (9), of the outer wall of the circumference of the bearing (1).

3. A power plant pre-pump mechanical seal arrangement according to claim 1, wherein: and a positioning ring (10) is tightly sleeved on the outer wall of the circumference of the bearing (1).

4. A power plant pre-pump mechanical seal arrangement according to claim 1, wherein: the outer wall of the circumference of the bearing (1) close to the movable ring sealing ring (5) is tightly sleeved with a static ring (7), and the outer wall of one side of the static ring (7) is tightly sleeved with a static ring sealing ring (6).

5. A power plant pre-pump mechanical seal arrangement according to claim 2, wherein: the gland (12) is sleeved on the outer wall of the circumference of the bearing (1) close to the spring gasket (8).

6. A power plant pre-pump mechanical seal arrangement according to claim 5, characterized in that: the movable ring (4) is sleeved on the inner wall of the circumference of the gland (12), the outer wall of the circumference of the gland (12) is provided with a screw hole (3), a fixed shaft (11) is arranged in the screw hole (3), and the outer wall of one side of the gland (12) is provided with three fixed holes (13) distributed at equal intervals.