Anti-seepage and anti-creeping oil leading-out device of steam turbine bearing box

Abstract

The utility model relates to the technical field of steam turbine bearing box anti-seepage, in particular to an anti-seepage and anti-creeping oil leading-out device of a steam turbine bearing box, which aims to solve the problems of oil seepage, oil creeping and leading-out wire abrasion of the bearing box in the prior art, and specifically comprises a mounting seat mounted on the box wall of the bearing box, a wire inlet cavity for leading-out wires in the bearing box to penetrate is formed in the mounting seat, at least one connector is arranged behind the mounting seat, each connector corresponds to one leading-out wire, a pressing cover is correspondingly arranged behind the connector, the front end of the connector is fixedly connected with the mounting seat, and the rear end of the connector is in threaded connection with the pressing cover; through the matched design of the mounting base, the connector and the pressing cover, lubricating oil is prevented from leaking outwards; the lead-out wires are independently provided with the connectors, so that the lead-out wires are effectively prevented from being stressed and collided; and through matched use of the oil blocking sleeve and the seepage stopping sealant, a siphon channel is effectively blocked, and the lubricating oil is further prevented from climbing into a gap and leaking out of the bearing box.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-seepage of a steam turbine bearing box, in particular to an anti-seepage and anti-climbing oil outlet device of a steam turbine bearing box. Background Art

[0002] A steam turbine is a rotary steam power device. High-temperature and high-pressure steam passes through a fixed nozzle and becomes an accelerated airflow, which is then sprayed onto the blades, causing the rotor with the blades to rotate and perform work externally. Steam turbines are the main equipment in modern thermal power plants and are also widely used in the metallurgical industry, chemical industry, and ship power devices.

[0003] The bearing box is an important component of the steam turbine and is mainly used to install bearings and bearing seats. Various sensors for monitoring the operating status of the bearings (such as temperature, DEH speed and TSI sensors) are distributed in the bearing box. The lead wires of these sensors are arranged in the bearing box and are led to the external terminal box of the bearing box through the lead holes on the wall of the bearing box.

[0004] In the prior art, these lead wires are not separated when passing through the wall of the turbine bearing box, and only blue glue is applied to the cylinder elbow to prevent the lubricating oil in the bearing box from leaking out. Not only does oil seepage and dripping occur, but it is also easy to cause force collision and friction between the lead wires, resulting in wear and breakage. In addition, since there is a gap between the core wire of the lead wire and the insulating layer, and the internal pressure of the bearing box is high, there is a pressure difference between the inside and the outside, resulting in a siphon phenomenon, causing the lubricating oil to crawl into the gap and leak out of the bearing box. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an anti-seepage and anti-climbing oil outlet device for a steam turbine bearing box in view of the deficiencies of the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An anti-seepage and anti-climbing oil outlet device for a steam turbine bearing box has the following characteristics:

[0008] It comprises a mounting seat mounted on the wall of the bearing box, wherein a wire entry cavity is provided in the mounting seat for the lead wire in the bearing box to pass through, at least one connector is provided at the rear of the mounting seat, each connector corresponds to a lead wire, and a clamping cover is provided at the rear of the connector, the front end of the connector is fixedly connected to the mounting seat, and the rear end of the connector is threadedly connected to the clamping cover;

[0009] An outlet cavity connected to the inlet cavity is provided in the connector, an outlet hole for the lead-out wire to pass through is provided on the clamping cover, a section of the outlet cavity is provided as a sealing section, a peripheral wall of the sealing section extends inwardly to provide an abutting ring surface facing the clamping cover, a clamping ring is provided between the abutting ring surface and the clamping cover, a rear end of the clamping ring abuts against an end face of the clamping cover, an elastic sealing member is provided in the outlet cavity between the clamping ring and the abutting ring surface, a front end of the clamping ring extends into the outlet cavity, and can press the elastic sealing member forward against the abutting ring surface.

[0010] The technical problem to be solved by the utility model can be further achieved through the following steps: the mounting seat comprises a fixing seat fixedly mounted on the wall of the bearing box, and a first sealing ring is provided between the fixing seat and the wall of the bearing box.

[0011] The technical problem to be solved by the utility model can be further achieved through the following steps: the mounting seat also includes a screw-on cover threadedly connected to the rear end of the fixing seat, the connecting head and the screw-on cover are fixedly connected as a whole, and a second sealing ring is provided between the fixing seat and the screw-on cover.

[0012] The technical problem to be solved by the utility model can be further achieved through the following steps: the mounting seat also includes a fixed pressure plate bolted to the rear of the fixing seat, an adjustable orifice plate is provided between the fixed pressure plate and the fixing seat, the adjustable orifice plate is provided with a mounting hole corresponding to the connecting head, and the front end of the connecting head is installed in the mounting hole by screwing.

[0013] The technical problem to be solved by the utility model can be further achieved through the following steps: the fixed pressure plate is a ring structure with a central opening, the adjustable orifice plate is a circular plate coaxially arranged with the fixed pressure plate, and the connector on the adjustable orifice plate is always located in the opening of the fixed pressure plate.

[0014] The technical problem to be solved by the utility model can be further achieved by the following steps: a third sealing ring is provided between the adjustable orifice plate and the fixed seat.

[0015] The technical problem to be solved by the utility model can be further achieved through the following steps: the elastic sealing member is three stacked O-rings.

[0016] The technical problem to be solved by the utility model can be further achieved by the following steps: the lead wire comprises at least one metal inner core, an insulating outer layer is wrapped around the outside of the metal inner core, and an anti-collision outer layer is integrally sleeved on the outside of the insulating outer layer;

[0017] The lead-out line is provided with an anti-seepage section, at which an oil-blocking sleeve corresponding to the metal inner core is provided, the metal inner core at the oil-blocking sleeve is exposed, and an anti-seepage sealant is filled between the oil-blocking sleeve and the metal inner core.

[0018] The technical problem to be solved by the utility model can be further achieved through the following steps: the lead wire includes a connecting end connected to the sensor in the bearing box, and an extending end extending backward after passing through the mounting seat, the connector and the clamping cover, and the connecting end and the extending end are both provided with an anti-seepage section.

[0019] Compared with the prior art, the beneficial effects of the utility model are as follows: through the coordinated design of the mounting seat, the connector and the clamping cover, the sealing of the lead wire when passing through the bearing box wall is ensured to prevent the lubricating oil from leaking outwards; by equipping the lead wire with a separate connector, the phenomenon of force collision and friction between the lead wires, which causes wear and breakage, is effectively avoided; through the coordinated use of the oil-blocking sleeve and the anti-seepage sealant, the siphon channel is effectively blocked, further preventing the lubricating oil from creeping into the gap and leaking out of the bearing box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0021] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present utility model;

[0022] Figure 3 This is a schematic diagram of the structure of Embodiment 3 of the present utility model;

[0023] In the figure: 1-mounting seat; 2-lead wire; 3-inlet wire cavity; 4-connector; 5-pressing cover; 6-outlet wire cavity; 7-abutting annular surface; 8-pressing ring; 9-O-ring; 10-bearing box wall;

[0024] 101-fixed seat; 102-screw-on cover; 103-fixed pressure plate; 104-adjustable orifice plate;

[0025] 201-metal inner core; 202-insulating outer layer; 203-anti-collision outer layer; 204-anti-seepage section;

[0026] 2041-Oil-blocking casing; 2042-Anti-seepage sealant. DETAILED DESCRIPTION

[0027] The specific technical solutions of the present invention are further described below so that those skilled in the art can further understand the present invention, but it does not constitute a limitation on the rights thereof.

[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions 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 device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.

[0029] In the following embodiments, for ease of explanation, the direction close to the bearing box is defined as “front”, and the direction away from the bearing box is defined as “rear”.

[0030] [Example 1]

[0031] Please refer to Figure 1 , an anti-seepage and anti-climbing oil outlet device for a steam turbine bearing box, comprising a mounting seat 1 mounted on a bearing box wall 10, a wire entry cavity 3 for a lead-out wire 2 in the bearing box to pass through is provided in the mounting seat 1, at least one connector 4 is provided at the rear of the mounting seat 1, each connector 4 corresponds to a lead-out wire 2, a clamping cover 5 is provided at the rear of the connector 4, the front end of the connector 4 is fixedly connected to the mounting seat 1, and the rear end of the connector 4 is threadedly connected to the clamping cover 5; 1 to 9 connectors 4 can be provided, and only one connector 4 is provided separately in this embodiment;

[0032] An outlet cavity 6 communicating with the inlet cavity 3 is provided in the connector 4, and an outlet hole for the lead wire 2 to pass through is provided on the pressing cover 5. The lead wire 2 in the bearing box passes through the inlet cavity 3, the outlet cavity 6 and the outlet hole in sequence and then continues to extend backward;

[0033] A section of the outlet cavity 6 is set as a sealing section, and the peripheral wall of the sealing section extends inward to form an abutting ring surface 7 facing the pressing cover 5, and a pressing ring 8 is provided between the abutting ring surface 7 and the pressing cover 5, and the rear end of the pressing ring 8 abuts against the end surface of the pressing cover 5, so that it can be pushed forward by the pressing cover 5;

[0034] An elastic seal is provided in the outlet cavity 6 between the clamping ring 8 and the abutting ring surface 7. The front end of the clamping ring 8 extends into the outlet cavity 6 and can press the elastic seal forward against the abutting ring surface 7. The elastic seal is preferably three stacked O-rings 9. The lead-out wire 2 passes through the sealing section. When the clamping ring 8 pushes the O-ring 9 forward to press it, the O-ring 9 expands radially and tightly fills the gap between the lead-out wire 2 and the peripheral wall of the sealing section, effectively preventing the outflow of lubricating oil, thereby achieving the purpose of preventing seepage and oil climbing.

[0035] The mounting seat 1 comprises a fixing seat 101 fixedly mounted on the bearing box wall 10, and a first sealing ring is provided between the fixing seat 101 and the bearing box wall 10. Specifically, the bearing box wall is provided with a through hole, the edge of the through hole is provided with an internal thread, and the front end of the fixing seat 101 is correspondingly provided with an external thread, and the fixing seat 101 is threadedly connected with the through hole.

[0036] The mounting base 1 further comprises a screw-on cover 102 threadedly connected to the rear end of the fixing base 101, the connector 4 is fixedly connected to the screw-on cover 102 as a whole, and a second sealing ring is provided between the fixing base 101 and the screw-on cover 102. The screw-on cover 102 comprises an annular cover body with a central opening, and the front end of the connector 4 is arranged in the aforementioned opening and is integrally formed with the edge of the opening. In this way, both structural stability and ease of assembly and disassembly are taken into account.

[0037] [Example 2]

[0038] Please refer to Figure 2 , which is different from [Example 1] in the structure of the mounting base 1. Specifically, the mounting base 1 includes a fixing base 101 and a fixing plate 103 bolted to the rear of the fixing base 101, and an adjustable orifice plate 104 is provided between the fixing plate 103 and the fixing base 101. The adjustable orifice plate 104 is provided with a mounting hole corresponding to the connector 4, and the front end of the connector 4 is screwed into the mounting hole by screwing; in this embodiment, two connectors 4 are provided. The adjustable orifice plate 104 is pressed onto the fixing base 101 by the fixing plate 103. When disassembly is required, the adjustable orifice plate 104 can be taken out by simply loosening and removing the fixing plate 103.

[0039] In order to realize the adjustable function, the fixed plate 103 is a ring structure with a central opening, the adjustable orifice plate 104 is a circular plate coaxially arranged with the fixed plate 103, and the connector 4 on the adjustable orifice plate 104 is always located in the opening of the fixed plate 103. When the position of the lead-out wire 2 needs to be adjusted, the fixed plate 103 only needs to be loosened to rotate the adjustable orifice plate 104 to a suitable position, and the connector 4 will never interfere with the fixed plate 103 during the rotation. A third sealing ring is provided between the adjustable orifice plate 104 and the fixed seat 101 to further improve the sealing effect between the adjustable orifice plate 104 and the fixed seat 101.

[0040] [Example 3]

[0041] An anti-seepage and anti-climbing oil lead-out device for a steam turbine bearing box comprises a mounting seat 1 mounted on a bearing box wall 10, a wire entry cavity 3 for a lead-out wire 2 in the bearing box to pass through is provided in the mounting seat 1, at least one connector 4 is provided at the rear of the mounting seat 1, each connector 4 corresponds to a lead-out wire 2, a clamping cover 5 is provided at the rear of the connector 4, the front end of the connector 4 is fixedly connected to the mounting seat 1, and the rear end of the connector 4 is threadedly connected to the clamping cover 5;

[0042] An outlet cavity 6 connected to the inlet cavity 3 is provided in the connector 4, and an outlet hole for the lead-out wire 2 to pass through is provided on the pressing cover 5. A section of the outlet cavity 6 is set as a sealing section, and the peripheral wall of the sealing section extends inwardly with an abutting ring surface 7 facing the pressing cover 5. A pressing ring 8 is provided between the abutting ring surface 7 and the pressing cover 5, and the rear end of the pressing ring 8 abuts against the end surface of the pressing cover 5. An elastic sealing member is provided in the outlet cavity 6 between the pressing ring 8 and the abutting ring surface 7, and the front end of the pressing ring 8 extends into the outlet cavity 6 and can press the elastic sealing member forward onto the abutting ring surface 7.

[0043] Please refer to Figure 3 This embodiment mainly optimizes and improves the structure of the lead wire 2 to prevent the siphoning oil climbing phenomenon. Specifically, the lead wire 2 includes at least one metal inner core 201, an insulating outer layer 202 is wrapped around the outside of the metal inner core 201, and an anti-collision outer layer 203 is integrally sleeved outside the insulating outer layer 202;

[0044] The lead-out line 2 is provided with an anti-seepage section 204, and an oil-blocking sleeve 2041 corresponding to the metal inner core 201 is provided at the anti-seepage section 204. The metal inner core 201 at the oil-blocking sleeve 2041 is exposed, and an anti-seepage sealant 2042 is filled between the oil-blocking sleeve 2041 and the metal inner core 201. The oil-blocking sleeve 2041 is preferably made of 304 stainless steel, which has good corrosion resistance and high temperature resistance, and can ensure long-term stable operation under harsh working conditions; at the same time, 304 stainless steel also has high mechanical strength and toughness, and can withstand certain tension and vibration, thereby ensuring the stability and reliability of the lead-out line 2. The anti-seepage sealant 2042 is preferably epoxy resin, which has excellent adhesion and sealing properties, and can be tightly combined with the metal inner core and the oil-blocking sleeve to form a reliable sealing layer.

[0045] The lead wire 2 includes a connection end connected to the sensor in the bearing box, and an extension end extending backward after passing through the mounting seat 1, the connector 4 and the clamping cover 5.

[0046] One or more anti-seepage sections 204 may be provided. To further improve the anti-seepage effect, both the connecting end and the extending end are provided with anti-seepage sections 204, thereby achieving head-to-tail sealing and effectively preventing oil creep.

[0047] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Claims

1. An anti-seepage and anti-climbing oil outlet device for a steam turbine bearing box, Features: It comprises a mounting seat mounted on the wall of the bearing box, wherein a wire entry cavity is provided in the mounting seat for the lead wire in the bearing box to pass through, at least one connector is provided at the rear of the mounting seat, each connector corresponds to a lead wire, and a clamping cover is provided at the rear of the connector, the front end of the connector is fixedly connected to the mounting seat, and the rear end of the connector is threadedly connected to the clamping cover; An outlet cavity connected to the inlet cavity is provided in the connector, an outlet hole for the lead-out wire to pass through is provided on the clamping cover, a section of the outlet cavity is provided as a sealing section, a peripheral wall of the sealing section extends inwardly to provide an abutting ring surface facing the clamping cover, a clamping ring is provided between the abutting ring surface and the clamping cover, a rear end of the clamping ring abuts against an end face of the clamping cover, an elastic sealing member is provided in the outlet cavity between the clamping ring and the abutting ring surface, a front end of the clamping ring extends into the outlet cavity, and can press the elastic sealing member forward against the abutting ring surface.

2. The anti-seepage and anti-climbing oil outlet device for a steam turbine bearing box according to claim 1, Features: The mounting seat comprises a fixing seat fixedly mounted on the wall of the bearing box, and a first sealing ring is arranged between the fixing seat and the wall of the bearing box.

3. The anti-seepage and anti-climbing oil outlet device for a steam turbine bearing box according to claim 2, Features: The mounting seat also includes a screw-on cover threadedly connected to the rear end of the fixing seat, the connector and the screw-on cover are fixedly connected as a whole, and a second sealing ring is provided between the fixing seat and the screw-on cover.

4. The anti-seepage and anti-climbing oil outlet device for a steam turbine bearing box according to claim 2, Features: The mounting seat also includes a fixed pressure plate bolted to the rear of the fixing seat, an adjustable orifice plate is provided between the fixed pressure plate and the fixing seat, the adjustable orifice plate is provided with a mounting hole corresponding to the connecting head, and the front end of the connecting head is installed in the mounting hole by screwing.

5. The anti-seepage and anti-climbing oil outlet device for a steam turbine bearing box according to claim 4, Features: The fixed pressure plate is a ring-shaped structure with a central opening, and the adjustable orifice plate is a circular plate coaxially arranged with the fixed pressure plate, and the connector on the adjustable orifice plate is always located in the opening of the fixed pressure plate.

6. The anti-seepage and anti-climbing oil outlet device for a steam turbine bearing box according to claim 5, Features: A third sealing ring is arranged between the adjustable orifice plate and the fixing seat.

7. The anti-seepage and anti-climbing oil outlet device for a steam turbine bearing box according to claim 1, Features: The elastic sealing member is three stacked O-rings.

8. The anti-seepage and anti-climbing oil outlet device for a steam turbine bearing box according to claim 1, Features: The lead wire comprises at least one metal inner core, an insulating outer layer is wrapped around the metal inner core, and an anti-collision outer layer is integrally sleeved on the outer side of the insulating outer layer; The lead-out line is provided with an anti-seepage section, at which an oil-blocking sleeve corresponding to the metal inner core is provided, the metal inner core at the oil-blocking sleeve is exposed, and an anti-seepage sealant is filled between the oil-blocking sleeve and the metal inner core.

9. The anti-seepage and anti-climbing oil outlet device for a steam turbine bearing box according to claim 8, Features: The lead-out line comprises a connecting end connected to the sensor in the bearing box, and an extending end extending backward after passing through the mounting seat, the connector and the clamping cover. Both the connecting end and the extending end are provided with a seepage-stopping section.

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