CN216589942U

CN216589942U - Sealing device for large open-type bearing box

Info

Publication number: CN216589942U
Application number: CN202122516000.5U
Authority: CN
Inventors: 张进
Original assignee: Dandong Power Plant of Huaneng International Power Co Ltd
Current assignee: Dandong Power Plant of Huaneng International Power Co Ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2022-05-24
Anticipated expiration: 2031-10-19

Abstract

The utility model discloses a sealing device for a large-scale open-type bearing box, which comprises a first sealing ring and a second sealing ring, wherein the first sealing ring is sleeved on the outer side wall of a bearing box main body; the technical effects achieved are as follows: through the sealing effect of first sealing ring and second sealing ring for on the basis that does not change bearing box overall structure, provide the canned type for the bearing box, promote equipment's reliability and security, economic nature greatly. The reliability and the economical efficiency of the whole system of the power station boiler are improved. The sealing effect of the utility model is increased by the locking action of the locking ring and the adjusting action of the adjusting block. The utility model has simple structure, convenient manufacture and convenient use.

Description

Sealing device for large open-type bearing box

Technical Field

The utility model relates to the technical field of bearing box sealing, in particular to a sealing device for a large-sized open type bearing box.

Background

The boiler air preheater is the key heat exchange equipment of the core of a power station boiler, and the safety and the reliability of the boiler air preheater are directly related to the overall reliability, the safety and the economy of a coal-fired power plant.

At present, the design of open bearing box is all adopted in international, domestic boiler air heater core key part under bracing bearing box is sealed, does not have effectual sealed means, and a large amount of dust debris in the external world all can get into the bearing box, pollutes the bearing incasement portion, pollutes inside lubricating oil and bearing, increases the wearing and tearing of bearing, and the lubricated effect of degradation causes the bearing to damage, has reduced the reliability of air heater core key part under bracing bearing box, leads to a large amount of fault situations to take place.

SUMMERY OF THE UTILITY MODEL

To this end, the present invention provides a sealing device for a large open bearing housing to solve the above-mentioned problems in the prior art.

In order to achieve the above purpose, the utility model provides the following technical scheme:

according to a first aspect of the utility model, the sealing device for the large open-type bearing box comprises a first sealing ring and a second sealing ring, wherein the first sealing ring is sleeved on the outer side wall of the bearing box main body, the second sealing ring is sleeved on the outer wall of the bearing box top seat, and the lower end of the second sealing ring is connected with the first sealing ring.

Further, the sealing device is characterized by further comprising a locking ring, wherein the locking ring is sleeved on the outer side wall of the second sealing ring.

Further, its characterized in that still includes the regulating block, the regulating block sets up on the outer wall of bearing box footstock, the regulating block laminating is in the upper wall of second sealing ring.

Further, the bearing box is characterized in that the first sealing ring is connected with the bearing box main body through a bolt, and an adjusting gasket is arranged at the joint.

Further characterized in that the surface roughness of the upper surface of the first seal ring is less than 0.8 μm.

Further characterized in that said locking ring is bolted to said second seal ring.

Further characterized in that the circumference of the locking ring is less than the outside ring circumference of the second seal ring.

Further, it is characterized in that the second sealing ring is of an elastic structure.

The utility model has the following advantages: through the sealing effect of first sealing ring and second sealing ring for on the basis that does not change bearing box overall structure, provide the canned type for the bearing box, promote equipment's reliability and security, economic nature greatly. The reliability and the economical efficiency of the whole system of the power station boiler are improved. The sealing effect of the utility model is increased by the locking action of the locking ring and the adjusting action of the adjusting block. The utility model has simple structure, convenient manufacture and convenient use.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

Fig. 1 is a cross-sectional view of a sealing device for a large open bearing housing according to some embodiments of the present invention.

Fig. 2 is a partial cross-sectional view of a sealing device for a large open bearing housing according to some embodiments of the present invention.

In the figure: 1. the bearing box comprises a first sealing ring, a second sealing ring, a locking ring, a regulating block, a bearing box main body, a bearing box top seat and a regulating block, wherein the first sealing ring 2, the second sealing ring 3, the locking ring 4, the regulating block 5, the bearing box main body 6 and the bearing box top seat are arranged on the bearing box top seat.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the utility model will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the utility model and that it is not intended to limit the utility model to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 2, in an embodiment of the first aspect of the present invention, a sealing device for a large open bearing box includes a first sealing ring 1 and a second sealing ring 2, where the first sealing ring 1 is sleeved on an outer side wall of a bearing box main body 5, the second sealing ring 2 is arranged on an outer wall of a top seat of the bearing box, and a lower end of the second sealing ring 2 is connected to the first sealing ring 1.

In the above embodiment, it should be noted that the typical structure of the open bearing housing is composed of two major parts, namely, a non-rotating bearing housing body 5 (in which a thrust bearing is installed) and a bearing housing top seat 6 in which a bearing inner ring or an outer ring synchronously rotates, and by combining the specific structure of the bearing housing, castings, such as the outer circle of the outer wall of the upper supporting disc and the outer circle of the outer wall of the bearing housing, are closely measured and appropriately drilled, and a metal stainless steel stationary ring sealing base surface is formed on the bearing housing supporting surface. A planing contact type elastic sealing structure is arranged on the outer circular ring surface of the upper cover of the bearing box. The sealing movable ring is formed, during installation, the first sealing ring 1 is fixed on a jacking platform extending out of the bearing box body through bolts and is fixedly adjusted according to 180 degrees, finally, the sealing surface of the first sealing ring 1 is horizontal, a seam is tightly jointed without groove marks, the second sealing ring 2 is used for customizing a mold according to the diameter of a rotating bearing box top seat, the diameter is divided by 180 degrees, and proper sealing lip pressure and a small amount of deformation are formed after the contact distance between the second sealing ring and the first sealing ring 1 is adjusted, so that a sealing function is formed.

The technical effects achieved by the above embodiment are as follows: through the cooperation use of first sealing ring 1 with second sealing ring 2 for under the holistic circumstances of open bearing box, satisfy the sealed demand of reforming transform of the open bearing box of different forms.

Optionally, as shown in fig. 1 to 2, in some embodiments, a locking ring 3 is further included, and the locking ring 3 is sleeved on an outer side wall of the second sealing ring 2.

In the above alternative embodiment, it should be noted that the sealing ring is a 180-degree planing locking ring 3 made of stainless steel or carbon steel, and the interface with the second sealing ring 2 is locked by a bolt, and the tightening of the adjusting bolt can apply a tightening force to the second sealing ring 2.

The beneficial effects of the above alternative embodiment are: apply the tightening force for second sealing ring 2 through the sealing ring, bearing box footstock is hugged closely to second sealing ring 2 for the sealing performance of this device is better.

Optionally, as shown in fig. 1 to 2, in some embodiments, the seal ring further includes an adjusting block, the adjusting block is disposed on an outer wall of the top seat of the bearing housing, and the adjusting block 4 is attached to an upper wall of the second seal ring 2.

In the above alternative embodiment, it should be noted that the adjusting pad is mainly used to adjust the sealing surface level set of the second sealing ring 2 to obtain a proper sealing lip tightening force, and the proper thickness is obtained by a successive adjustment test.

The beneficial effects of the above alternative embodiment are: through the adjustment of the 180-degree plane of the adjustment section 4, the second sealing ring 2 is attached to the top seat of the bearing box, and the sealing performance of the device is better.

Alternatively, as shown in fig. 1 to 2, in some embodiments, the first seal ring 1 is connected with the bearing housing main body 5 through bolts, and a spacer is provided at the joint.

In the above alternative embodiment, it should be noted that the adjusting shim before the first seal ring 1 and the bearing housing main body 5 are adjusted, so that the first seal ring 1 and the bearing housing main body 5 are more fitted.

The beneficial effects of the above alternative embodiment are: make first sealing ring 1 and bearing box main part 5 laminate more through setting up adjusting shim for this device sealing performance is better.

Alternatively, as shown in fig. 1 to 2, in some embodiments, the upper surface of the first seal ring 1 is mirror-finished.

In the above optional embodiment, it should be noted that the connection surface between the first seal ring 1 and the second seal ring 2 is mirror-finished, and is more suitable.

The beneficial effects of the above alternative embodiment are: the upper surface of the first sealing ring 1 is set to be mirror surface precision, so that the sealing performance of the device is better.

Alternatively, as shown in fig. 1 to 2, in some embodiments, it is characterized in that the locking ring 3 is bolted to the second seal ring 2.

In the above alternative embodiment, it should be noted that the tightening force of the locking ring 3 on the second sealing ring 2 can be adjusted by adjusting the tightness of the bolt.

The beneficial effects of the above alternative embodiment are: the locking ring 3 is arranged and is connected on the second sealing ring 2 through bolts, so that the sealing performance of the device is controllable.

Alternatively, as shown in fig. 1-2, in some embodiments, the circumference of the locking ring 3 is less than the outside ring circumference of the second sealing ring 2.

In the alternative embodiment described above, it should be noted that the circumference of the locking ring 3 is 10-15 mm shorter than the circumference of the securing ring of the second sealing ring 2, ensuring sufficient tightening force when bolting two 180 deg. planed locking assemblies together.

The beneficial effects of the above alternative embodiment are: by providing a locking ring 3 having a circumference smaller than the circumference of the outer ring of the second sealing ring 2, a sufficient tightening force is provided, resulting in a better gas tightness of the device.

Alternatively, as shown in fig. 1-2, in some embodiments, the second seal ring 2 is of a resilient construction.

In the above optional embodiment, it should be noted that the second sealing ring 2 is made of tetrafluoro modified rubber, the mold is customized according to the diameter of the top seat of the rotating bearing box, the sealing movable ring is formed by planing the surface according to the design by utilizing the characteristics of the rubber, such as strong elasticity, high strength, low friction coefficient, self-lubrication and the like, and the sealing function is formed by planing the diameter of 180 degrees, and forming proper sealing lip pressure and a small amount of deformation after adjusting the contact distance with the first sealing ring 1 by means of the elasticity of the sealing movable ring.

The beneficial effects of the above alternative embodiment are: through second sealing ring 2 for elastic construction for this device's elasticity is good, and coefficient of friction is high, makes the life increase of this device.

Although the utility model has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the utility model. Accordingly, such modifications and improvements are intended to be within the scope of the utility model as claimed.

In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content.

Claims

1. The utility model provides a sealing device for large-scale open-type bearing box, open-type bearing box include bearing box main part (5) and bearing box footstock (6), its characterized in that, sealing device includes first sealing ring (1) and second sealing ring (2), first sealing ring (1) cover establish on the lateral wall of bearing box main part (5), second sealing ring (2) cover is established on the outer wall of bearing box footstock (6), the lower extreme of second sealing ring (2) with first sealing ring (1) are connected.

2. A sealing device for large open bearing housings according to claim 1, further comprising a locking ring (3), said locking ring (3) being fitted over the outer sidewall of the second sealing ring (2).

3. A sealing device for large open bearing housings according to claim 2, further comprising an adjusting block (4), wherein the adjusting block (4) is arranged on the outer wall of the top housing seat (6), and the adjusting block (4) is attached to the upper wall of the second sealing ring (2).

4. A sealing arrangement for large open bearing housing according to claim 1, characterized in that the first sealing ring (1) is bolted to the bearing housing body (5) and is provided with an adjusting shim at the joint.

5. A sealing arrangement for a large open bearing housing according to claim 1, characterized in that the surface roughness of the upper surface of the first sealing ring (1) is less than 0.8 μm.

6. A sealing arrangement for a large open bearing housing according to claim 2, characterized in that the locking ring (3) is bolted to the second sealing ring (2).

7. A sealing arrangement for a large open bearing housing according to claim 2, characterized in that the circumference of the locking ring (3) is smaller than the outer ring circumference of the second sealing ring (2).

8. A sealing arrangement for a large open bearing housing according to claim 1, characterized in that the second sealing ring (2) is of resilient construction.