Oil blocking device for preventing oil leakage of bearing bush of steam turbine

Abstract

The utility model relates to an oil blocking device for preventing oil leakage of a steam turbine bearing bush in the technical field of steam turbines, a second bearing bush assembly used for being matched with a first bearing bush assembly to conduct oil leakage prevention on a rotating shaft is arranged opposite to the first bearing bush assembly, and a sealing device comprises a leakage-proof strip which is arranged in a first sealing groove and used for sealing a bearing bush body. And a sealing strip which is arranged in the sealing groove I and is used for sealing the bearing bush body is movably and fixedly mounted on the leakage-proof strip close to the rotating shaft. When the first bearing bush assembly and the second bearing bush assembly of the rotating shaft of the steam turbine need to be connected, the leakage-proof strip can be clamped in the second sealing groove, the sealing strip is tightly attached to the interior of the first sealing groove, and lubricating oil in the first bearing bush assembly and the second bearing bush assembly can be prevented from leaking when the steam turbine unit runs at a high speed. When the bearing bush is used, lubricating oil can enter the first leakage-proof groove and the second leakage-proof groove under the action of centrifugal force, so that the lubricating oil can be recycled in the bearing bush, and the lubricating oil can be effectively prevented from seeping out by utilizing the material characteristics of the leakage-proof strips and the sealing strips.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbines, in particular to an oil blocking device for preventing oil leakage from a steam turbine bearing bush. Background Art

[0002] A steam turbine is a rotary power machine that converts the energy of steam into mechanical work. It is mainly used as a prime mover for power generation. The exhaust steam or intermediate extraction steam of the steam turbine can also be used to meet the heating needs of production and life. The existing turbine bearing uses a bearing oil retaining ring to prevent lubricating oil from leaking from the turbine bearing. For example, as shown in the turbine bearing oil retaining structure with Chinese patent application number CN201821443334.6, the oil retaining plate is vertically arranged in the middle bearing box between the bearing and the oil retaining ring, the plate surface of the oil retaining plate is perpendicular to the axial direction of the turbine rotor, and the oil retaining plate is arranged directly above the turbine rotor, the outer edge of the oil retaining plate matches the shape of the inner wall of the middle bearing box, and the outer edge of the oil retaining plate is fixedly connected to the inner wall of the middle bearing box; the inner edge of the oil retaining plate matches the shape of the turbine rotor.

[0003] However, the mechanical seal device of the turbine generator set bearing usually adopts a sealing method that cooperates with dynamic and static oil retaining rings. Since the bearing oil retaining ring is used to prevent the lubricating oil from flowing out of the bearing oil retaining ring, only the oil retaining plate is used to prevent the lubricating oil from seeping out, which makes it easy for the lubricating oil to flow out from the gap between the turbine rotor and the upper part of the oil retaining ring. Utility Model Content

[0004] In order to solve the problem that the mechanical seal device for the bearing of the steam turbine generator set proposed in the above background technology usually adopts a sealing method in which a dynamic and a static oil retaining ring cooperate with each other, and the lubricating oil is prevented from flowing out of the bearing oil retaining ring by the bearing oil retaining ring, and only the oil retaining plate is used to prevent the lubricating oil from leaking out, which makes it easy for the lubricating oil to flow out from the gap between the turbine rotor and the upper part of the oil retaining ring, the utility model provides the following technical solutions:

[0005] An oil-blocking device for preventing oil leakage from a turbine bearing comprises a rotating shaft, the outer side of which is provided with a bearing body for preventing oil leakage, and the bearing body is provided with a sealing device for cooperating with the bearing body to prevent oil leakage on the rotating shaft.

[0006] The bearing bush body comprises a bearing bush component 1 arranged on the rotating shaft for preventing the rotating shaft from oil leakage, and a bearing bush component 2 is arranged opposite to the bearing bush component 1 for cooperating with the bearing bush component 1 to prevent the rotating shaft from oil leakage.

[0007] Furthermore, a sealing groove 1 for sealing the bearing bush assembly 1 is provided on the shaft body of the rotating shaft, and there are two sealing grooves 1, which are distributed in a linear array on the shaft body of the rotating shaft.

[0008] Furthermore, the bearing bush assembly 1 includes a bearing bush arranged on the outside of the rotating shaft, and the bush body of the bearing bush is provided with four threaded holes.

[0009] Furthermore, the inner wall of the bearing shell is provided with a second sealing groove for cooperating with the sealing device to prevent oil leakage on the rotating shaft, and there are two second sealing grooves. The inner wall of the bearing shell is provided with a first leakage-proof groove for preventing oil leakage. The inner wall of the bearing shell is provided with a second leakage-proof groove for preventing oil leakage, and the second leakage-proof groove is located above the first leakage-proof groove.

[0010] Furthermore, the sealing device includes a leak-proof strip arranged in the sealing groove 1 for sealing the bearing body, and the leak-proof strip is fixedly installed with a sealing strip arranged in the sealing groove 1 for sealing the bearing body near the movable part of the rotating shaft.

[0011] Furthermore, bolts for fixing the bearing assembly 1 and the bearing assembly 2 are arranged in the cavity of the threaded hole, and there are four bolts.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] By setting the bearing assembly 1, the bearing assembly 2 and the sealing device, when the bearing assembly 1 and the bearing assembly 2 of the rotating shaft of the turbine need to be connected, the leak-proof strip can be stuck in the sealing groove 2, and the sealing strip can be tightly attached to the sealing groove 1. When the turbine unit runs at a high speed, the lubricating oil in the bearing assembly 1 and the bearing assembly 2 will enter the leak-proof groove 1 and the leak-proof groove 2 under the action of centrifugal force, so that the lubricating oil can be circulated inside the bearing. The material properties of the leak-proof strip and the sealing strip can effectively prevent the lubricating oil from leaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0015] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the bearing body of the utility model;

[0018] Figure 3 This is a cross-sectional view of the rotating shaft of the utility model;

[0019] Figure 4 For this utility model Figure 3 Enlarged view of point A in the middle;

[0020] Figure 5 This is a structural schematic diagram of a bearing bush assembly of the utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the sealing device of the utility model;

[0022] Figure 7 For this utility model Figure 6 Enlarged view of point B in the middle.

[0023] In the accompanying drawings, the names of the components represented by the reference numerals are listed as follows:

[0024] 100-rotating shaft, 101-sealing groove 1;

[0025] 200-bearing shell body, 210-bearing shell assembly 1, 211-bearing shell, 212-threaded hole, 213-sealing groove 2, 214-leakage-proof groove 1, 215-leakage-proof groove 2, 220-bearing shell assembly 2;

[0026] 300-sealing device, 310-leakage-proof strip, 320-sealing strip;

[0027] 001-Bolt. DETAILED DESCRIPTION

[0028] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of description and are not intended to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships shall be regarded as within the scope of implementation of the present invention without substantially changing the technical content.

[0030] See also Figure 1-Figure 7 The utility model provides an oil blocking device for preventing oil leakage from a turbine bearing bush.

[0031] The utility model comprises a rotating shaft 100 , a bearing shell body 200 for preventing oil leakage is arranged on the outer side of the rotating shaft 100 , and a sealing device 300 for preventing oil leakage of the rotating shaft 100 and cooperating with the bearing shell body 200 is arranged inside the bearing shell body 200 .

[0032] A sealing groove 101 for sealing the bearing assembly 210 is provided on the shaft body of the rotating shaft 100 , and there are two sealing grooves 101 , which are distributed on the shaft body of the rotating shaft 100 in a linear array.

[0033] The bearing body 200 includes a bearing assembly 210 arranged on the rotating shaft 100 for preventing the rotating shaft 100 from oil leakage. Opposite the bearing assembly 210 is a bearing assembly 220 for cooperating with the bearing assembly 210 to prevent the rotating shaft 100 from oil leakage. The composition of the bearing assembly 220 is the same as that of the bearing assembly 210. Therefore, this application only introduces the bearing assembly 210 accordingly.

[0034] The bearing assembly 210 includes a bearing 211 arranged on the outside of the rotating shaft 100, and the bearing body of the bearing 211 is provided with threaded holes 212, and there are four threaded holes 212; bolts 001 for fixing the bearing assembly 1 210 and the bearing assembly 2 220 are arranged in the cavity of the threaded holes 212, and there are four bolts 001, so that the four bolts 001 can be inserted into the threaded holes 212, and the threaded connection between the four bolts 001, the four threaded holes 212 and the nuts can be used to quickly fix the bearing assembly 1 210 with the bearing assembly 1 210.

[0035] A second sealing groove 213 is provided on the inner wall of the bearing shell 211 for cooperating with the sealing device 300 to prevent oil leakage of the rotating shaft 100, and there are two sealing grooves 213. The two sealing grooves 213 are distributed in a linear array on the inner wall of the bearing shell 211. A leakage-proof groove 1 214 is provided on the inner wall of the bearing shell 211 for preventing oil leakage. A leakage-proof groove 215 is provided on the inner wall of the bearing shell 211 for preventing oil leakage, and the leakage-proof groove 215 is located above the leakage-proof groove 1 214.

[0036] The sealing device 300 includes a leak-proof strip 310 arranged in a sealing groove 101 for sealing the bearing body 200. The leak-proof strip 310 is fixedly installed with a sealing strip 320 for sealing the bearing body 200 in the sealing groove 101 near the movable part of the rotating shaft 100; therefore, when it is necessary to connect the bearing assembly 1 210 and the bearing assembly 2 220 of the turbine shaft 100, the leak-proof strip 310 can be stuck in the sealing groove 213, and the sealing strip 320 can be tightly attached to the sealing groove 101. When the turbine unit is running at a high speed, the lubricating oil in the bearing assembly 1 210 and the bearing assembly 2 220 will enter the leak-proof groove 1 214 and the leak-proof groove 2 215 under the action of centrifugal force, so that the lubricating oil can be guaranteed to be circulated inside the bearing 211. The material properties of the leak-proof strip 310 and the sealing strip 320 can effectively prevent the lubricating oil from leaking out.

[0037] Based on the above content and the accompanying drawings, those skilled in the art can understand and implement the utility model. In addition, any non-creative modifications made to the utility model by those skilled in the art without making creative work still fall within the scope of protection of the utility model.

Claims

1. An oil blocking device for preventing oil leakage from a turbine bearing, comprising a rotating shaft (100), characterized in that: A bearing bush body (200) for preventing oil leakage is arranged on the outer side of the rotating shaft (100), and a sealing device (300) for cooperating with the bearing bush body (200) to prevent oil leakage of the rotating shaft (100) is arranged inside the bearing bush body (200); The bearing shell body (200) comprises a bearing shell component 1 (210) arranged on the rotating shaft (100) for preventing the rotating shaft (100) from oil leakage, and a bearing shell component 2 (220) is arranged opposite to the bearing shell component 1 (210) for cooperating with the bearing shell component 1 (210) to prevent the rotating shaft (100) from oil leakage.

2. The oil blocking device for preventing oil leakage from a turbine bearing according to claim 1 is characterized in that: The shaft body of the rotating shaft (100) is provided with a sealing groove (101) for sealing the bearing bush assembly (210), and there are two sealing grooves (101), which are distributed in a linear array on the shaft body of the rotating shaft (100).

3. The oil blocking device for preventing oil leakage from a turbine bearing according to claim 1 is characterized in that: The bearing bush assembly (210) comprises a bearing bush (211) arranged on the outside of the rotating shaft (100), and a bush body of the bearing bush (211) is provided with four threaded holes (212).

4. The oil blocking device for preventing oil leakage from a turbine bearing according to claim 3 is characterized in that: The inner wall of the bearing shell (211) is provided with an oil sealing groove (213) for cooperating with the sealing device (300) to prevent the rotating shaft (100) from leaking, and there are two sealing grooves (213). The inner wall of the bearing shell (211) is provided with a leakage-proof groove (214) for preventing oil leakage. The inner wall of the bearing shell (211) is provided with a leakage-proof groove (215) for preventing oil leakage, and the leakage-proof groove (215) is located above the leakage-proof groove (214).

5. The oil blocking device for preventing oil leakage from a turbine bearing according to claim 2 is characterized in that: The sealing device (300) comprises a leak-proof strip (310) arranged in a sealing groove (101) for sealing the bearing body (200), and a sealing strip (320) is installed in the sealing groove (101) for sealing the bearing body (200) near the movable fixed installation of the leak-proof strip (310) of the rotating shaft (100).

6. The oil blocking device for preventing oil leakage from a turbine bearing according to claim 3 is characterized in that: Bolts (001) for fixing the first bearing assembly (210) and the second bearing assembly (220) are arranged in the cavity of the threaded hole (212), and there are four bolts (001).

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