Device for preventing oil leakage of steam turbine bearing bush temperature element circuit

Abstract

The utility model discloses a steam turbine bearing bush temperature element circuit oil leakage prevention device which comprises a box body, a wire inlet is formed in one side of the box body, a sealing pipe is arranged on the other side of the box body, a cover plate is arranged on the upper portion of the box body, a first distributor plate and a second distributor plate are arranged in the box body, the bottom face of the cover plate is connected with a third distributor plate, and an oil collection cavity is formed in the lower portion of the box body. A clamping assembly is arranged at a connecting port of the sealing pipe and the box body, a plug is arranged at the end, away from the box body, of the sealing pipe, and a glue injection port is formed in the sealing pipe. Through the branching plate, the wire core of each branch wire bypasses the branching groove of each branching plate and is bent, lubricating oil leaked among thin wires of the branch wires is converged at the lower end of the bent branch wire under the action of gravity to form oil drops, the oil drops drop into the oil collection cavity at the lower part of the box body, and then sealant is injected into the sealing pipe through the sealant injection port. Gaps between circuits are filled with the sealant so as to prevent lubricating oil in the bearing bush from leaking outwards through the circuits of the temperature element to affect normal operation of unit components.

Description

Technical Field

[0001] This utility model belongs to the field of power system equipment technology, specifically relating to a device for preventing oil leakage from the circuit of the temperature element of a steam turbine bearing. Background Technology

[0002] In power systems, bearing bushes, also known as bushings, are key components of rotating equipment such as generators, motors, steam turbines, and water turbines. Their function is to maintain the radial positional accuracy of the shaft during high-speed rotation and prevent shaft misalignment. In practice, an oil film exists between the bearing bush and the shaft for lubrication. If lubrication is inadequate, there will be direct friction between the bearing bush and the shaft. This friction will generate high temperatures, causing the bearing bush to burn out. Burnt-out bearing bushes will affect the normal operation of the unit's shaft. Therefore, it is necessary to install temperature elements inside the bearing bushes to determine whether the unit is operating normally by measuring the temperature of the bearing bushes.

[0003] The problem encountered in practice is that, due to capillary action, lubricating oil leaks outward along the wiring through the adhesion between the lubricating oil and the wiring. The lubricating oil flows through the cable to the cable joint and then into the electrical box along the wire core, causing other electrical components, such as displacement and vibration monitoring elements, to be immersed in the oil layer. This can lead to corrosion and damage to other electrical components and affect the normal operation of the unit. Utility Model Content

[0004] This application proposes a device to prevent oil leakage from the temperature element circuit of a turbine bearing, which is used to prevent lubricating oil inside the bearing from leaking out through the temperature element circuit, causing corrosion and damage to other electrical components and affecting the normal operation of the unit.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A device for preventing oil leakage from the temperature element circuit of a steam turbine bearing includes a housing, an inlet on one side of the housing, a sealing tube on the other side of the housing, a cover plate on the upper part of the housing, a first branch plate and a second branch plate inside the housing, a third branch plate connected to the bottom surface of the cover plate, an oil collection chamber at the lower part of the housing, a clamping assembly at the connection between the sealing tube and the housing, a plug at the end of the sealing tube away from the housing, and an adhesive injection port on the sealing tube.

[0007] In one embodiment of this application, a conduit is provided at the inlet.

[0008] In one embodiment of this application, the conduit is arranged at an angle.

[0009] In one embodiment of this application, the clamping assembly includes a push block disposed in a groove on the inner wall of the box, a spring being disposed in the groove, and one end of the push block being connected to the spring.

[0010] In one embodiment of this application, an oil drain valve is provided at the lower part of the oil collecting chamber.

[0011] In one embodiment of this application, a level gauge is provided inside the oil collecting chamber.

[0012] In one embodiment of this application, a mounting bracket is connected to the outside of the box.

[0013] In summary, the technical solution proposed in this application includes the following beneficial technical effects: This application uses a third branch plate positioned at a low position between the first and second branch plates, causing the core of each branch line to bend around the branch plate's groove. When the branch line is at the low position of the bend, the lubricating oil leaking between the fine wires of the branch line will be attracted by gravity and converge at the low end of the bent branch line, forming oil droplets. Due to the van der Waals forces between the lubricating oils, the oil droplets will again attract the lubricating oil in the branch line core to accumulate. If the oil droplets accumulate to a large size, they will drip into the oil collection cavity at the bottom of the housing to reduce the amount of oil seeping into the branch line core. Then, sealant is injected into the sealing tube through the injection port, filling the gaps between the lines to further prevent oil seepage. This prevents lubricating oil in the bearing bush from leaking out through the temperature element's lines, causing corrosion and damage to other electrical components and affecting the normal operation of the unit. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural schematic diagram of a device for preventing oil leakage from the circuit of a steam turbine bearing temperature element provided in an embodiment of this application;

[0016] Figure 2 This is a side-view perspective view of a device for preventing oil leakage from the circuit of a steam turbine bearing temperature element, provided in an embodiment of this application.

[0017] Figure 3 This is a top view of a device for preventing oil leakage from the circuit of a steam turbine bearing temperature element according to an embodiment of this application;

[0018] Figure 4 This is a cross-sectional structural schematic diagram of an anti-oil leakage device for the temperature element circuit of a steam turbine bearing provided in an embodiment of this application;

[0019] Figure 5This is a schematic diagram of the circuit bending structure of the anti-oil leakage device for the temperature element circuit of a steam turbine bearing provided in an embodiment of this application;

[0020] Figure 6 This is a top view of a device for preventing oil leakage from the circuit of a steam turbine bearing temperature element according to an embodiment of this application;

[0021] Figure 7 This is a side view of a device for preventing oil leakage from the circuit of a steam turbine bearing temperature element according to an embodiment of this application;

[0022] In the diagram: box 1, cable inlet 11, sealing tube 12, plug 121, glue injection port 122, first branch plate 13, second branch plate 14, third branch plate 15;

[0023] Cover plate 2;

[0024] Oil collecting chamber 3, oil drain valve 31;

[0025] Catheter 4;

[0026] Push block 51, slide 52, spring 53;

[0027] Mounting bracket 6. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0029] It should be noted that in the description of this application, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] In this application, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of these terms in this application based on the specific circumstances.

[0031] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0032] This embodiment provides a device for preventing oil leakage from the circuit of a steam turbine bearing temperature element. (See reference...) Figures 1-7 As shown, the device includes a housing 1, with a cable inlet 11 on one side and a sealing tube 12 on the other side. A cover plate 2 is provided on the upper part of the housing 1, and a first cable splitter 13 and a second cable splitter 14 are provided inside the housing 1. A third cable splitter 15 is connected to the bottom surface of the cover plate 2. An oil collection chamber 3 is provided at the lower part of the housing 1. A clamping assembly is provided at the connection between the sealing tube 12 and the housing 1. A plug 121 is provided at the end of the sealing tube 12 away from the housing 1, and an adhesive injection port 122 is provided on the sealing tube 12.

[0033] In the above embodiment, the inlet 11 on one side of the housing 1 is used to introduce the inner core of the temperature element circuit into the housing 1. The temperature element circuit outside the housing 1 is provided with an outer sheath. A first branching plate 13 and a second branching plate 14 are respectively provided inside the housing 1. The branching plate is provided with multiple branching grooves to separate the branches of the element circuit, increasing the distance between the branches to prevent capillary action from causing lubricating oil to seep through the gaps between the branches. Further, a third branching plate 15 is provided between the first branching plate 13 and the second branching plate 14, such as... Figure 4 As shown, the upper part of the third branch plate 15 is connected to the bottom surface of the cover plate 2, and the branch groove of the third branch plate 15 is set downwards, while the branch grooves of the first branch plate 13 and the second branch plate 14 are set upwards. The branch plate of the third branch plate 15 is set at a low position between the first branch plate 13 and the second branch plate 14, so that the wire core of each branch line is bent around the branch groove of each branch plate. Figure 5As shown, when the branch line is at the lower bend, the lubricating oil leaking between the thin wires of the branch line will be attracted by gravity and gather at the lower end of the bend to form oil droplets. In addition, due to the van der Waals forces between the lubricating oils, the oil droplets will attract the lubricating oil in the branch line core to gather again. When the oil droplets are too large, they will drip into the oil collection chamber 3 at the bottom of the box 1, which will drain the oil seepage in the temperature element circuit, reduce the amount of oil seepage in the branch line core, and make it easier to clean the seepage oil in the oil collection chamber 3, which will help reduce the amount of work to clean the circuit oil leakage later. Furthermore, the branch lines converge in the sealing tube 12. A clamping assembly is provided at the connection between the sealing tube 12 and the box 1 to clamp and fix the branch lines, thereby improving the stability of the line convergence. The component lines pass through the sealing tube 12 and are connected to the plug 121 at one end of the sealing tube 12. The sealing tube 12 can be a heat shrink tube. Sealant is injected into the sealing tube 12 through the injection port 122 to fill the gaps between the lines and further prevent oil leakage. After injection, the heat shrink tube is heat-shrinked to tightly wrap the outside of the lines for protection. Optionally, a shielding layer and an insulation layer can be provided on the outside of the sealing tube 12 to improve the protection effect of the lines.

[0034] In one embodiment of this application, see reference Figure 2 As shown, a conduit 4 is provided at the inlet 11.

[0035] In the above embodiment, the conduit 4 is used to connect the inlet 11 of the housing 1 to the outlet of the temperature element circuit inside the bearing bush. Oil seepage inside the circuit sheath will cause corrosion and damage to the circuit sheath, which will cause lubricating oil to leak out from the wire core. The conduit 4 is set on the outside to prevent the leaked lubricating oil from leaking out and dripping onto external equipment, causing corrosion damage, which is beneficial to maintaining the normal operation of the equipment.

[0036] In one embodiment of this application, see [reference] Figure 2 As shown, the conduit 4 is arranged at an angle.

[0037] In the above embodiment, the inclined lower end of the conduit 4 is connected to the inlet 11, so that the oil leaking in the conduit 4 is discharged into the box 1 and flows into the oil collection chamber 3 in a timely manner, preventing the oil leaking in the conduit 4 from accumulating and causing corrosion of the conduit 4, which is beneficial to improving the service life of the component.

[0038] In one embodiment of this application, see reference Figure 6 As shown, the clamping assembly includes a push block 51, which is disposed in a groove 52 on the inner wall of the box body 1. A spring 53 is disposed in the groove 52, and one end of the push block 51 is connected to the spring 53.

[0039] In the above embodiment, the slide 52 is used to guide the push block 51, and the spring 53 is used to push the push blocks 51 on both sides of the line to move along the slide 52 towards the line, thereby clamping and fixing the component line, which is beneficial to improving the stability of the line routing.

[0040] In one embodiment of this application, see reference Figure 7 As shown, an oil drain valve 31 is provided at the lower part of the oil collecting chamber 3.

[0041] In the above embodiment, the oil drain valve 31 is used to drain the lubricating oil in the oil collection chamber 3. In addition, the working condition of the turbine shaft can be judged by the state of the drained lubricating oil, such as viscosity and element content. For example, if the iron content of the drained lubricating oil increases, it indicates that the friction between the shaft and the bearing bush has increased, resulting in fatigue wear on the surface of the bearing and gear. It is necessary to add lubricating oil to the bearing bush for lubrication, which is beneficial to detect abnormal equipment operation in time and troubleshoot in time.

[0042] In one embodiment of this application, a level gauge is provided in the oil collecting chamber 3.

[0043] In the above embodiment, the level gauge is used to monitor the level of lubricating oil in the oil collecting chamber 3. For example, if the level of lubricating oil in the oil collecting chamber 3 is higher than the height of the oil collecting chamber 3, the level gauge sends a signal to the warning device, such as a warning light, through the controller, such as a microcontroller, to remind the staff to clean the lubricating oil in the oil collecting chamber 3 in time to ensure the normal operation of the device.

[0044] In one embodiment of this application, see reference Figure 7 As shown, a mounting bracket 6 is connected to the outside of the box body 1.

[0045] In the above embodiments, the mounting bracket 6 is used to provide connection points for the installation and fixation of the box 1. By connecting the support rod, connecting wall and other components, the box 1 can be stably installed, which is beneficial to improving the stability of the device operation.

[0046] In actual use, the housing 1 contains a first branching plate 13 and a second branching plate 14. Each branching plate has multiple branching grooves to separate the various branches of the component circuitry, increasing the distance between them to prevent lubricating oil from seeping through the gaps. A third branching plate 15 is positioned between the first branching plate 13 and the second branching plate 14. Figure 4As shown, the upper part of the third branch plate 15 is connected to the bottom surface of the cover plate 2, and the branch groove of the third branch plate 15 is set downwards, while the branch grooves of the first branch plate 13 and the second branch plate 14 are set upwards. The branch plate of the third branch plate 15 is set at a low position between the first branch plate 13 and the second branch plate 14, so that the core of each branch line is bent around the branch groove of each branch plate. When the oil droplets accumulate too much at the bend, they will drip into the oil collection cavity 3 at the bottom of the box 1 to further reduce the amount of oil seepage in the core of the branch line. The component line passes through the sealing tube 12 and is connected to the plug 121 at one end of the sealing tube 12. The sealing tube 12 can be a heat shrink tube. The sealant is injected into the sealing tube 12 through the glue injection port 122 to fill the gap between the lines and further prevent the lines from seeping oil. In summary, this is to prevent the lubricating oil in the bearing bush from leaking out through the temperature element line, causing corrosion and damage to other electrical components and affecting the normal operation of the unit.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A device for preventing oil leakage from a temperature element line of a turbine bearing, characterized by comprising: The device includes a housing (1), with an inlet (11) on one side and a sealing tube (12) on the other side. A cover plate (2) is provided on the upper part of the housing (1), and a first branch plate (13) and a second branch plate (14) are provided inside the housing (1). A third branch plate (15) is connected to the bottom surface of the cover plate (2). An oil collection chamber (3) is provided at the lower part of the housing (1). A clamping assembly is provided at the connection between the sealing tube (12) and the housing (1). A plug (121) is provided at the end of the sealing tube (12) away from the housing (1), and an injection port (122) is provided on the sealing tube (12).

2. The anti-steam turbine bearing temperature element line oil leakage device according to claim 1, characterized in that, A conduit (4) is provided at the inlet (11).

3. The anti-steam turbine bearing shell temperature element line oiling device of claim 2, wherein, The conduit (4) is set at an angle.

4. The anti-steam turbine bearing temperature element wire oil leakage device of claim 1, wherein, The clamping assembly includes a push block (51), which is disposed in a groove (52) on the inner wall of the box (1). A spring (53) is disposed in the groove (52), and one end of the push block (51) is connected to the spring (53).

5. The anti-steam turbine bearing temperature element wire oil leakage device of claim 1, wherein, An oil drain valve (31) is provided at the lower part of the oil collecting chamber (3).

6. The anti-steam turbine bearing temperature element line oil leakage device of claim 5, wherein, A level gauge is installed inside the oil collecting chamber (3).

7. The oil leakage device for a temperature element line of a steam turbine bearing shell according to any one of claims 1 to 6, characterized in that The outer side of the box (1) is connected to a mounting bracket (6).

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