Anti-leakage device for turbine bearing bush temperature measuring element

Abstract

The utility model discloses a steam turbine bearing bush temperature measuring element anti-leakage device, which comprises a rubber plug assembly and a plurality of aviation plugs, the rubber plug assembly is detachably installed in a temperature measuring element wire outlet hole of a steam turbine cylinder body in a sealing mode, and a plurality of connecting through holes are formed in a rubber plug body of the rubber plug assembly. The aviation plugs are detachably installed in the corresponding connecting through holes in a sealed mode, and the aviation plugs correspond to bearing bush temperature measuring elements in the steam turbine cylinder body in a one-to-one mode. One end of the aviation plug is connected with a lead wire core of a bearing bush temperature measurement element in the steam turbine cylinder body, and the other end of the aviation plug is connected with a lead wire core outside the steam turbine cylinder body, so that lead wire leading-out of the temperature measurement element is realized. The utility model has the advantages of compact structure, simple and convenient disassembly and assembly, high sealing performance, low cost and the like, solves the problem of oil leakage of the leading-out wire of the turbine bearing bush temperature measuring element, and improves the cleanliness and safety of the operation of the turbine.

Description

Technical Field

[0001] The utility model belongs to the technical field of steam turbine oil leakage prevention, and in particular relates to an anti-leakage device for a steam turbine bearing temperature measuring element. Background Art

[0002] In the modern industrial field, steam turbines play a vital role as important power equipment in the power generation industry. However, during the long-term operation of the steam turbine, the protective layer of the temperature extension line of each bearing of the steam turbine is easy to harden and crack under the scouring of lubricating oil, causing the lubricating oil or oil gas generated by high temperature to penetrate into the inner layer of the temperature extension line through the cracks. The micro-positive pressure environment of each cylinder of the steam turbine causes the oil accumulated in the temperature extension line to be slowly transported to the cable trough box or the junction box. In the summer when the ambient temperature is high, the micro-positive pressure environment of the cylinder increases due to the increase in the amount of lubricating oil and gas, and the amount of oil leakage in the temperature element extension line is greater. This not only causes a waste of resources, but may also affect the normal operation of the equipment. The oil leakage from the cable trough box and the intermediate junction box is also a major safety hazard. In order to solve these problems and improve the reliability and stability of the steam turbine, an effective solution for preventing oil leakage of the bearing temperature measuring element is urgently needed.

[0003] At present, there are some methods and technologies for solving the problem of oil leakage from the temperature of the turbine bearing. For example, a simple pressure-blocking oil barrier is made on the temperature lead of the turbine bearing, and the oil barrier section is placed in the cylinder to block the oil. However, during the actual operation of the turbine, the oil leakage of the temperature lead of the turbine bearing not only leaks from the outer protective layer of the lead, but also leaks from the core of the lead. The design of the oil barrier section of the lead is not detailed enough, and the oil-blocking stainless steel sleeve is placed inside the cylinder, which can only prevent oil leakage from the front end of the stainless steel sleeve. The oil leakage at the rear end of the stainless steel sleeve is not considered, and there is still the possibility of oil leakage. The existing anti-oil leakage device has a cumbersome installation process due to the consideration of sealing. Some of them are too simple without considering sealing, and the anti-leakage effect is not obvious. Utility Model Content

[0004] The technical problem to be solved by the utility model is to solve the problem caused by sludge splashing, and to provide an anti-leakage device for turbine bearing temperature measuring elements which has a compact structure, is convenient to assemble and disassemble, has high sealing performance and is low in cost.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A leakage prevention device for a turbine bearing temperature measuring element comprises a rubber plug assembly and a plurality of aviation plugs, wherein the rubber plug assembly is detachably and sealably installed in a wire outlet hole of a temperature measuring element of a turbine cylinder body, a plurality of connecting through holes are arranged in a rubber plug body of the rubber plug assembly, each of the aviation plugs is detachably and sealably installed in a corresponding connecting through hole, and the aviation plugs correspond one to one with the bearing temperature measuring element inside the turbine cylinder body; one end of the aviation plug is connected to a lead wire core of the bearing temperature measuring element inside the turbine cylinder body, and the other end of the aviation plug is connected to a lead wire core outside the turbine cylinder body, so as to realize the lead out of the temperature measuring element.

[0007] As a further improvement of the utility model, the bottom of the plug body is provided with an external thread; when the plug body passes through the interior of the turbine cylinder, a plug cap is screwed into the bottom of the plug body to fix the plug body in the outlet hole of the temperature measuring element.

[0008] As a further improvement of the present invention, the rubber plug body is in a T-shaped structure, and an elastic sealing gasket is provided between the rubber plug body and the wire outlet hole of the temperature measuring element.

[0009] As a further improvement of the present invention, the aviation plug includes a plug base, a self-locking elastic column and a self-locking cap. The plug base passes through the connecting through hole, one end of the plug base is connected to the lead wire core inside the turbine cylinder body, and the other end of the plug base is detachably connected to the self-locking cap, and the self-locking cap is connected to the lead wire core outside the turbine cylinder body; multiple self-locking elastic columns are evenly distributed on the periphery of the plug base. When the plug base passes through the connecting through hole from the inside of the turbine cylinder body, the self-locking elastic column abuts against the periphery of the connecting through hole to fix the plug base in the connecting through hole.

[0010] As a further improvement of the utility model, an elastic sealing gasket is provided between the plug base and the connecting through hole.

[0011] As a further improvement of the utility model, the plug base is connected to the lead wire core inside the turbine cylinder body by soldering, and the self-locking cap is connected to the lead wire core outside the turbine cylinder body by soldering.

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

[0013] The utility model discloses an anti-leakage device for a temperature measuring element of a bearing of a turbine. The plug assembly is detachably sealed and installed in the outlet hole of the temperature measuring element of the turbine cylinder body, and a plurality of connecting through holes are arranged in the plug body. Then, each aviation plug is detachably sealed and installed in the corresponding connecting through holes. Moreover, the number of aviation plugs corresponds to the temperature measuring element of the bearing inside the turbine cylinder body one by one, so that multiple leads inside the turbine cylinder body are gathered into the plug assembly for easy management. One end of the aviation plug is connected to the lead wire core of the temperature measuring element of the bearing inside the turbine cylinder body, and the other end of the aviation plug is connected to the lead wire core outside the turbine cylinder body, so that the lead wire of the temperature measuring element is led out. By adopting the out-of-cylinder installation mode of the aviation plug, if there is oil leakage on the inner side of the cylinder of the turbine bearing temperature element, it can only leak on the base side of the aviation plug and drip into the cylinder body, and will not leak to the outside of the cylinder body, so that a better oil blocking effect is achieved, and higher requirements for the reliability and stability of the turbine in the industrial field are met. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structural principle of the anti-leakage device in a specific embodiment of the utility model.

[0015] Figure 2 The utility model is a schematic diagram of the connection structure principle between the rubber plug assembly and the turbine cylinder body in a specific embodiment.

[0016] Figure 3 It is a schematic diagram of the side structural principle of the rubber plug assembly in a specific embodiment of the utility model.

[0017] Legend: 1. Rubber plug assembly; 2. Aviation plug; 3. Lead wire core; 4. Tin soldering point; 5. Steam turbine cylinder; 11. Rubber plug body; 12. Connecting through hole; 13. External thread; 14. Rubber plug cap; 21. Plug base; 22. Self-locking elastic column; 23. Self-locking cap. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0019] In the description of the present invention, it should be understood that the terms "side", "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0021] Example

[0022] like Figures 1 to 3 As shown, the anti-leakage device for the temperature measuring element of the bearing of the turbine of the utility model comprises a plug assembly 1 and a plurality of aviation plugs 2. The plug assembly 1 is detachably sealed and installed in the outlet hole of the temperature measuring element of the turbine cylinder 5. The plug body 11 of the plug assembly 1 is provided with a plurality of connecting through holes 12. Each of the aviation plugs 2 is detachably sealed and installed in the corresponding connecting through holes 12. The aviation plugs 2 correspond to the temperature measuring element of the bearing inside the turbine cylinder 5 one by one. One end of the aviation plug 2 is connected to the lead wire core 3 of the temperature measuring element of the bearing inside the turbine cylinder 5, and the other end of the aviation plug 2 is connected to the lead wire core 3 outside the turbine cylinder 5 to realize the lead-out of the temperature measuring element.

[0023] In this embodiment, the sealing rubber plug assembly 1 is designed according to the wall thickness of the steam turbine cylinder 5 and the size of the temperature outlet hole, and the number of connecting through holes 12 in the rubber plug body 11 can be determined according to the actual number of steam turbine bearing shell temperatures, with a slight margin reserved for backup. The rubber plug assembly 1 can be made of a rubber material with a certain elasticity, and the aviation plug 2 can be an aviation plug with a self-locking function.

[0024] In this embodiment, the plug assembly 1 is detachably sealed and installed in the outlet hole of the temperature measuring element of the turbine cylinder body 5, and a plurality of connecting through holes 12 are provided in the plug body 11, and then each aviation plug 2 is detachably sealed and installed in the corresponding connecting through hole 12, and the number of aviation plugs 2 corresponds one-to-one to the bearing temperature measuring element inside the turbine cylinder body 5, so that the multiple leads inside the turbine cylinder body 5 are gathered into the plug assembly for easy management. Furthermore, one end of the aviation plug 2 is connected to the lead wire core 3 of the bearing temperature measuring element inside the turbine cylinder 5, and the other end of the aviation plug 2 is connected to the lead wire core 3 outside the turbine cylinder 5, that is, the lead of the temperature measuring element is realized. By adopting the out-of-cylinder installation method of the aviation plug 2, if there is oil leakage on the inside of the cylinder of the turbine bearing temperature element, it can only leak on the base side of the aviation plug 2 and drip into the cylinder, and will not leak to the outside of the cylinder, thereby achieving a better oil blocking effect and meeting the higher requirements of the industrial field for turbine reliability and stability.

[0025] like Figure 2 As shown, in this embodiment, an external thread 13 is provided at the bottom of the plug body 11; after the plug body 11 passes through the interior of the turbine cylinder 5, a plug cap 14 is screwed into the bottom of the plug body 11 to fix the plug body 11 in the outlet hole of the temperature measuring element to prevent the plug body 11 from loosening due to the high-speed rotation of the turbine.

[0026] Furthermore, the plug body 11 has a T-shaped structure to increase the contact sealing area with the wire outlet hole of the temperature measuring element, and an elastic sealing gasket is provided between the plug body 11 and the wire outlet hole of the temperature measuring element to improve the sealing performance between the plug body 11 and the wire outlet hole of the temperature measuring element and reduce the risk of oil leakage.

[0027] like Figure 1 As shown, in this embodiment, the aviation plug 2 includes a plug base 21, a self-locking elastic column 22 and a self-locking cap 23. The plug base 21 passes through the connecting through hole 12. One end of the plug base 21 is connected to the lead wire core 3 inside the steam turbine cylinder 5 by soldering. The other end of the plug base 21 is detachably connected to the self-locking cap 23. The self-locking cap 23 is connected to the lead wire core 3 outside the steam turbine cylinder 5 by soldering. Soldering points 4 are provided between the plug base 21 and the lead wire core 3 and between the self-locking cap 23 and the lead wire core 3. Multiple self-locking elastic columns 22 are evenly distributed on the periphery of the plug base 21. When the plug base 21 passes through the connecting through hole 12 from the inside of the steam turbine cylinder 5, the self-locking elastic columns 22 abut against the periphery of the connecting through hole 12 to fix the plug base 21 in the connecting through hole 12.

[0028] Furthermore, an elastic sealing gasket made of rubber material is provided between the plug base 21 and the connecting through hole 12 to improve the sealing performance. In this embodiment, the sealing gasket is put on the rubber plug assembly 1 before installation, and the sealing gasket is put on the plug base 21 before installation of the aviation plug 2, so as to achieve double sealing, good sealing performance, and easy and convenient disassembly and assembly.

[0029] In this embodiment, the temperature measuring element of the turbine cylinder bearing is cut according to the length of each bearing temperature outlet hole (reserved length), and is soldered to the two ends of the aviation plug 2. After the temperature measuring element is installed inside the turbine cylinder 5, the plug base 21 is passed through the connecting through hole 12, self-locked by the self-locking elastic column 22, and then self-locked by the self-locking cap 23. The removal steps of the self-locking aviation plug 2 are: 1) remove the self-locking cap 23; 2) press down the self-locking elastic column 22, push the plug base 21 into the inside of the turbine cylinder 5 with a little force, and then remove the plug base 21 from the inside of the turbine cylinder 5.

[0030] Although the utility model is disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any technician familiar with the art can use the above disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the utility model without departing from the spirit and technical solution of the utility model, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of protection of the technical solution of the utility model.

Claims

1. A leakage prevention device for a temperature measuring element of a steam turbine bearing. It is characterized in that The invention comprises a rubber plug assembly (1) and a plurality of aviation plugs (2), wherein the rubber plug assembly (1) is detachably and hermetically mounted in a wire outlet hole of a temperature measuring element of a steam turbine cylinder body (5), a rubber plug body (11) of the rubber plug assembly (1) is provided with a plurality of connecting through holes (12), each of the aviation plugs (2) is detachably and hermetically mounted in a corresponding connecting through hole (12), and the aviation plugs (2) correspond one to one with the bearing temperature measuring element inside the steam turbine cylinder body (5); one end of the aviation plug (2) is connected to the lead wire core (3) of the bearing temperature measuring element inside the steam turbine cylinder body (5), and the other end of the aviation plug (2) is connected to the lead wire core (3) outside the steam turbine cylinder body (5) to realize the lead wire extraction of the temperature measuring element.

2. The anti-leakage device for the temperature measuring element of the steam turbine bearing according to claim 1, It is characterized in that The bottom of the rubber plug body (11) is provided with an external thread (13); after the rubber plug body (11) passes through the interior of the steam turbine cylinder (5), a rubber plug cap (14) is screwed into the bottom of the rubber plug body (11) to fix the rubber plug body (11) in the outlet hole of the temperature measuring element.

3. The anti-leakage device for the temperature measuring element of the steam turbine bearing according to claim 2, It is characterized in that The rubber plug body (11) is in a T-shaped structure, and an elastic sealing pad is provided between the rubber plug body (11) and the wire outlet hole of the temperature measuring element.

4. The anti-leakage device for the temperature measuring element of the turbine bearing according to claim 1, It is characterized in that The aviation plug (2) comprises a plug base (21), a self-locking elastic column (22) and a self-locking cap (23); the plug base (21) passes through the connecting through hole (12); one end of the plug base (21) is connected to the lead wire core (3) inside the steam turbine cylinder (5); the other end of the plug base (21) is detachably connected to the self-locking cap (23); the self-locking cap (23) is connected to the lead wire core (3) outside the steam turbine cylinder (5); a plurality of the self-locking elastic columns (22) are evenly distributed on the outer periphery of the plug base (21); when the plug base (21) passes through the connecting through hole (12) from the inside of the steam turbine cylinder (5), the self-locking elastic columns (22) abut against the outer periphery of the connecting through hole (12) to achieve the fixing of the plug base (21) in the connecting through hole (12).

5. The anti-leakage device for the temperature measuring element of the steam turbine bearing according to claim 4, It is characterized in that An elastic sealing pad is provided between the plug base (21) and the connecting through hole (12).

6. The anti-leakage device for the temperature measuring element of the steam turbine bearing according to claim 5, It is characterized in that The plug base (21) is connected to the lead wire core (3) inside the steam turbine cylinder body (5) by soldering, and the self-locking cap (23) is connected to the lead wire core (3) outside the steam turbine cylinder body (5) by soldering.

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