Adapter and steam turbine bearing box
By using the combination of conical channels and deformation seals of the adapter at the thermal control measurement points of the turbine bearing box, the problem of oil leakage after long-term operation is solved, a better sealing effect is achieved and safety is enhanced.
Patent Information
- Application Number
- CN202323533601.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-22
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2033-12-22
AI Technical Summary
After long-term operation, the thermal control measuring points of the turbine bearing box weakens due to the weakening of the degree of sealant bonding, which may cause oil leakage, which may cause safety hazards such as fires.
An adapter is designed, including a first joint and a second joint, forming a tapered channel, equipped with a deformable seal, and the compression part compresses the seal through deformation of the tapered channel section, and fits closely to the cable to form a sealing device. Reduce oil leakage.
It effectively reduces oil leakage from the adapter after long-term operation of the turbine, improves the sealing effect and enhances safety.
Smart Images
Figure CN222282473U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of steam turbine bearing box sealing, and in particular to an adapter and a steam turbine bearing box. Background Art
[0002] In the related art, when cables are led out from the thermal control measuring points on the turbine bearing box, adapters are usually used in combination with raw tape, rubber plugs and sealants for sealing. The sealing effect can be achieved in the initial trial operation of the turbine, but as the turbine is used for a long time, some thermal control measuring points will still leak from the adapters, causing on-site environmental pollution. In the event of high temperature, it may also cause fires. This is because as the operating time of the turbine increases, the degree of sealant adhesion between the raw tape and the cable will weaken due to the long-term high-temperature operation of the turbine, and oil is likely to leak from the threading holes to the outside of the adapter. Utility Model Content
[0003] The purpose of the present disclosure is to provide an adapter and a turbine bearing box, wherein the adapter can reduce oil leakage caused by long-term operation of the turbine, so as to at least partially solve the above technical problems.
[0004] In order to achieve the above-mentioned purpose, the first aspect of the present disclosure provides an adapter for installation at a thermal control measuring point on a turbine bearing box, so that a cable passing through the thermal control measuring point passes through the adapter, the adapter comprising: a first connector; a second connector connected to the first connector to jointly form a channel for the cable to pass through the first connector and the second connector in sequence, the channel comprising a tapered channel section located in the second connector, the inner diameter of the tapered channel section gradually decreasing from the first connector toward the second connector; and a sealing device located in the channel, the sealing device comprising a first seal and a second seal sleeved on the first seal, the first seal being provided with a threading hole for the cable to pass through, the second seal comprising a pressing portion; wherein the first seal and the second seal are deformable parts, and the tapered channel is used to compress the first seal to deform by guiding the pressing portion to deform toward the center line direction of the channel when the first connector and the second connector are connected, so that the threading hole fits the cable.
[0005] Optionally, the second sealing member further comprises an annular sleeve connection portion sleeved on the first sealing member, and the pressing portions are plural in number and are connected to the annular sleeve connection portion at intervals along the circumference of the annular sleeve connection portion.
[0006] Optionally, the clamping portion includes a clamping strip extending along the axial direction of the annular sleeve portion toward the tapered channel section.
[0007] Optionally, a protrusion capable of abutting against the conical channel section is provided at one end of the compression strip close to the conical channel section.
[0008] Optionally, the protrusion extends obliquely toward one end of the compression strip close to the tapered channel section and toward a side away from a center line of the annular sleeve portion.
[0009] Optionally, the first seal includes a first shaft segment and a second shaft segment connected to each other along the axial direction, and the threading hole passes through the first shaft segment and the second shaft segment; the first seal is located inside the first joint, the outer wall of the first shaft segment is in contact with the inner wall of the first joint, the outer diameter of the first shaft segment is larger than the outer diameter of the second shaft segment, and the annular sleeve portion is sleeved on the second shaft segment.
[0010] Optionally, the threading holes are multiple in number and arranged side by side.
[0011] Optionally, the adapter further comprises a rubber plug detachably connected to the plurality of threading holes.
[0012] Optionally, the first sealing member and the second sealing member are rubber members.
[0013] A second aspect of the present disclosure provides a turbine bearing box, wherein the turbine bearing box has the thermal control measuring point and an adapter installed at the thermal control measuring point, wherein the adapter is an adapter described in any of the above optional schemes.
[0014] Through the above technical solution, that is, the adapter provided by the present invention, when the adapter is installed on the thermal control measuring point on the bearing box of the turbine, the cable can be first passed through the threading hole on the first seal, and then the second seal can be sleeved on the outside of the first seal. At this time, the first seal and the second seal are assembled together into a complete sealing device, and the first joint and the second joint are connected so that the sealing device is located in the channel formed by the first joint and the second joint. During this process, the tapered channel section inside the second joint will gradually squeeze the clamping part, and then the clamping part can be guided to deform toward the center line direction of the channel. The clamping part will also press the first seal. While the first seal is compressed, the threading hole inside the first seal will also be squeezed, so that the inner wall of the threading hole can be tightly attached to the cable inside the threading hole, thereby achieving the purpose of sealing. In this way, oil will not leak from the threading hole to the outside of the adapter, thereby reducing the oil leakage from the adapter after the turbine has been running for a long time.
[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:
[0017] Figure 1 is a schematic diagram of a disassembled structure of an adapter with a rubber plug provided in an exemplary embodiment of the present disclosure;
[0018] Figure 2 is a schematic diagram of a disassembled structure of an adapter provided in an exemplary embodiment of the present disclosure;
[0019] Figure 3 is a schematic cross-sectional structure diagram of an adapter provided in an exemplary embodiment of the present disclosure;
[0020] Figure 4 is a schematic structural diagram of a combined state of an adapter provided in an exemplary embodiment of the present disclosure;
[0021] Figure 5 It is a schematic cross-sectional structure diagram of the assembled state of the adapter provided in the exemplary embodiment of the present disclosure.
[0022] Description of Reference Numerals
[0023] 1-first joint; 2-second joint; 201-conical channel section; 3-sealing device; 301-threading hole; 310-first sealing member; 311-first shaft section; 312-second shaft section; 320-second sealing member; 321-annular sleeve portion; 322-pressing portion; 3221-pressing strip; 3222-raised portion; 4-rubber plug. DETAILED DESCRIPTION
[0024] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.
[0025] In this disclosure, unless otherwise stated, directional words such as "up, down, left, right" generally refer to Figures 1 to 5 In any figure, the up, down, left, and right directions of the drawing, "inside and outside" refer to the inside and outside relative to a component or structure, and "first and second" etc. are for distinguishing one element from another and have no order or importance. In addition, the same figure marks in different reference drawings represent the same elements.
[0026] The present invention provides a transfer connector, referring to Figures 1 to 5As shown, the adapter is used to be installed at the thermal control measuring point on the bearing box of the steam turbine, so that the cable passing through the thermal control measuring point passes through the adapter. The adapter includes a first joint 1, a second joint 2 and a sealing device 3. The second joint 2 is connected to the first joint 1 to form a channel for the cable to pass through the first joint 1 and the second joint 2 in sequence. The channel includes a tapered channel section 201 located in the second joint 2, and the inner diameter of the tapered channel section 201 gradually decreases from the first joint 1 toward the second joint 2; the sealing device 3 is located in the channel, and the sealing device 3 is The device 3 includes a first seal 310 and a second seal 320 sleeved on the first seal 310, the first seal 310 is provided with a threading hole 301 for the cable to pass through, and the second seal 320 includes a clamping portion 322; wherein the first seal 310 and the second seal 320 are deformable parts, and the conical channel 201 is used to guide the clamping portion 322 to deform toward the center line of the channel when the first connector 1 and the second connector 2 are connected, so as to compress the first seal 310 to deform, so that the threading hole 301 fits the cable.
[0027] By the above-mentioned method, i.e., the adapter provided by the present invention, when the adapter is installed on the thermal control measuring point on the turbine bearing box, the cable can be first passed through the threading hole 301 on the first seal 310, and then the second seal 320 can be sleeved on the outside of the first seal 310. At this time, the first seal 310 and the second seal 320 are assembled together into a complete sealing device 3, and the first joint 1 and the second joint 2 are connected so that the sealing device 3 is located in the channel formed by the first joint 1 and the second joint 2. During this process, the tapered channel section 201 inside the second joint 2 will gradually squeeze the pressing part 322, thereby guiding the pressing part 322 to be pressed. The portion 322 is deformed toward the center line of the channel, and the pressing portion 322 also compresses the first sealing member 310. When the first sealing member 310 is compressed, the threading hole 301 inside the first sealing member 310 is also squeezed, so that the inner wall of the threading hole 301 can be tightly attached to the cable inside the threading hole 301, and then the first joint 1 can be threadedly connected to the thermal control measuring point of the turbine bearing box, and the end of the second joint 2 away from the first joint 1 is connected to the bellows, so that oil will not leak from the threading hole 301 to the outside of the adapter, thereby reducing the oil leakage from the adapter after the turbine has been running for a long time.
[0028] In addition, the first connector 1 and the second connector 2 can be connected in any suitable manner, for example, Figure 3 and Figure 5 As shown, an external thread can be provided on the first joint 1, and an internal thread can be provided on the second joint 2, so that the first joint 1 can be threadedly connected with the second joint 2, thereby improving the tightness of the adapter connection, and the tapered channel section 201 can be provided on the side of the internal thread of the second joint 2 away from the first joint 1, that is, referring to Figure 3 As shown, the tapered channel section 201 is arranged on the side of the second joint 2 close to the connection with the bellows. When the first joint 1 and the second joint 2 are screwed together, as the internal and external threads are tightened together, the first seal 310 and the second seal 320 will gradually move toward the position of the tapered channel section 201. At this time, the tapered inclined surface of the tapered channel section 201 will squeeze the pressing portion 322 toward the center line of the channel (i.e. Figure 5 As shown in the figure, the pressing portion 322 will also squeeze the first sealing member 310, and the threading hole 301 in the first sealing member 310 can also fit more closely to the cable inside the threading hole 301 under pressure, thereby improving the sealing effect.
[0029] In some embodiments, reference Figures 1 to 5 As shown, the second sealing member 320 further includes an annular sleeve portion 321 sleeved on the first sealing member 310, and the number of the pressing portions 322 is multiple and is connected to the annular sleeve portion 321 at intervals along the circumference of the annular sleeve portion 321. In this way, when the first sealing member 310 and the second sealing member 320 are connected to each other, the annular sleeve portion 321 can be sleeved on the outer side wall of the first sealing member 310, that is, Figure 5 As shown in the effect, the inner diameter of the annular sleeve portion 321 can be equal to or slightly smaller than the outer diameter of the first sealing member 310 , which can improve the connection tightness between the annular sleeve portion 321 and the first sealing member 310 .
[0030] In some embodiments, reference Figures 1 to 5 As shown, the pressing portion 322 includes a pressing strip 3221 extending along the axial direction of the annular sleeve portion 321 toward the tapered channel section 201. In this way, when the annular sleeve portion 321 is sleeved on the outer wall of the first seal 310 and the first seal 310 and the second seal 320 are both located inside the second connector 2, the tapered channel section 201 inside the second connector 2 can squeeze the pressing strip 3221, thereby allowing the pressing strip 3221 to be pressed against the first seal 310 to deform the first seal 310, thereby allowing the threading hole 301 inside the first seal 310 to fit more closely to the cable, and ultimately achieving a better sealing effect.
[0031] In addition, in order to improve the compression effect of the compression strip 3221 on the first sealing member 310, a plurality of compression strips 3221 may be arranged at intervals along the circumference of the annular sleeve portion 321, for example, Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, when the annular sleeve portion 321 is sleeved on the first seal 310, multiple compression strips 3221 can be compressed by the conical channel section 201 at the same time. In this way, multiple compression strips 3221 can also compress multiple circumferential positions of the first seal 310 at the same time, thereby allowing the inner wall of the threading hole 301 to fit more closely to the cable, thereby improving the sealing effect. The specific number of compression strips 3221 can also be selected according to actual conditions, such as two, four, eight or any other suitable number, and the present disclosure does not make specific limitations on this.
[0032] In some embodiments, reference Figures 1 to 5 As shown, the end of the pressing strip 3221 close to the tapered channel section 201 is provided with a protrusion 3222 that can abut against the tapered channel section 201. In this way, when the first seal 310 and the second seal 320 are assembled and installed inside the second joint 2, the tapered channel section 201 can squeeze the protrusion 3222, so that the pressing strip 3221 can exert a greater pressure on the first seal 310, so as to achieve a better sealing effect.
[0033] In some embodiments, reference Figures 1 to 5 As shown, the protrusion 3222 extends obliquely toward one end of the compression strip 3221 close to the tapered channel section 201 and toward the side away from the center line of the annular sleeve portion 321. In this way, the multiple protrusions 3222 all diverge outwardly toward the direction away from the center line of the annular sleeve portion 321, so that the multiple protrusions 3222 cooperate with the tapered channel section 201, and the inner wall of the tapered channel section 201 will form a greater abutment force on the multiple protrusions 3222, thereby improving the sealing effect of the adapter.
[0034] In some embodiments, reference Figures 1 to 5As shown, the first seal 310 includes a first shaft segment 311 and a second shaft segment 312 that are interconnected along the axial direction, and the threading hole 301 passes through the first shaft segment 311 and the second shaft segment 312; the first seal 310 is located inside the first joint 1, the outer wall of the first shaft segment 311 fits into the inside of the first joint 1, the outer diameter of the first shaft segment 311 is larger than the outer diameter of the second shaft segment 312, and the annular sleeve portion 321 is sleeved on the second shaft segment 312. In this way, when the first seal 310 is installed inside the first joint 1, the outer wall of the first shaft segment 311 fits against the inner wall of the first joint 1, which can improve the tightness of the connection between the first joint 1 and the first seal 310, thereby preventing the first seal 310 from shaking inside the first joint 1, and preventing oil leakage due to the shaking of the first seal 310. At the same time, the outer diameter of the first shaft segment 311 is greater than the outer diameter of the second shaft segment 312, and when the first seal 310 is inside the first joint 1, an installation margin can be reserved for the annular sleeve portion 321 to be connected to the second shaft segment 312.
[0035] In some embodiments, reference Figures 1 to 5 As shown, there are multiple threading holes 301 arranged side by side. In this way, multiple threading holes 301 can allow multiple strands of cables to pass through at the same time. At the same time, after the first sealing member 310 is compressed and deformed, the multiple threading holes 301 can also fit the multiple strands of wires passing through at the same time, thereby being able to seal the multiple strands of cables at the same time to improve the sealing effect.
[0036] In some embodiments, reference Figure 1 As shown, the adapter further includes a rubber plug 4 detachably connected to the plurality of threading holes 301. In this way, when the number of cables passing through the threading holes 301 is less than the total number of the threading holes 301, the rubber plug 4 can be inserted into the threading holes 301 that are not passed through by the cables. In this way, when the first sealing member 310 squeezes the threading holes 301 due to deformation, the threading holes 301 that are not passed through by the cables can squeeze the rubber plug 4 inserted therein, so that the threading holes 301 that are not passed through by the cables can also be sealed, thereby improving the sealing effect of the adapter.
[0037] In some embodiments, reference Figures 1 to 5 As shown, the first seal 310 and the second seal 320 are rubber parts, that is, the deformable parts mentioned above can be rubber parts. Through this construction method, the first seal 310 and the second seal 320 made of rubber material can have better compression deformation effect, and also have better rebound effect.
[0038] The second aspect of the present disclosure provides a steam turbine bearing box, which has a thermal control measuring point and an adapter installed at the thermal control measuring point, and the adapter has all the beneficial effects of the above-mentioned specific embodiments. The adapter can be used for the cable passing through the thermal control measuring point to be connected to an external control system, and the cable can be connected to a detection element inside the bearing box to realize functions such as the detection of bearing temperature, bearing vibration, and bearing axial displacement, and the control system can include a display screen that can display bearing temperature, bearing vibration, and bearing axial displacement information, so that the staff can remotely monitor the real-time status of the thermal control measuring point. At the same time, by connecting the adapter to the thermal control measuring point, when the steam turbine is running at high temperature for a long time, it can also reduce the leakage of oil from the thermal control measuring point, so as to achieve a better sealing effect.
[0039] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
[0040] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.
[0041] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.
Claims
1. An adapter, characterized in that: Used to be installed at a thermal control measuring point on a steam turbine bearing box, so that a cable passing through the thermal control measuring point passes through the adapter, the adapter comprising: First joint; a second connector connected to the first connector to form a channel for the cable to pass through the first connector and the second connector in sequence, the channel comprising a tapered channel section located in the second connector, the inner diameter of the tapered channel section gradually decreasing from the first connector toward the second connector; and A sealing device is located in the channel, the sealing device comprises a first sealing member and a second sealing member sleeved on the first sealing member, the first sealing member is provided with a threading hole for the cable to pass through, and the second sealing member comprises a pressing portion; Wherein, the first seal and the second seal are deformable parts, and the conical channel is used to compress the first seal to deform by guiding the clamping part to deform toward the center line direction of the channel when the first joint and the second joint are connected, so that the threading hole fits the cable.
2. The adapter according to claim 1, characterized in that: The second sealing member further comprises an annular sleeve portion sleeved on the first sealing member, and the pressing portions are plural in number and are connected to the annular sleeve portion at intervals along the circumference of the annular sleeve portion.
3. The adapter according to claim 2, characterized in that: The pressing portion includes a pressing strip extending along the axial direction of the annular sleeve portion toward the tapered channel section.
4. The adapter according to claim 3, characterized in that: One end of the compression strip close to the tapered channel section is provided with a protrusion capable of abutting against the tapered channel section.
5. The adapter according to claim 4, characterized in that: The protrusion extends obliquely toward one end of the compression strip close to the tapered channel section and toward a side away from the center line of the annular sleeve portion.
6. The adapter according to claim 2, characterized in that: The first sealing member comprises a first shaft segment and a second shaft segment connected to each other in the axial direction, and the threading hole passes through the first shaft segment and the second shaft segment; The first seal is located inside the first joint, the outer wall of the first shaft segment is in contact with the inner wall of the first joint, the outer diameter of the first shaft segment is greater than the outer diameter of the second shaft segment, and the annular sleeve portion is sleeved on the second shaft segment.
7. The adapter according to claim 5, characterized in that: The threading holes are multiple in number and arranged side by side.
8. The adapter according to claim 7, characterized in that: The adapter also includes a rubber plug detachably connected to the plurality of threading holes.
9. The adapter according to claim 1, characterized in that: The first sealing member and the second sealing member are rubber members.
10. A steam turbine bearing box, characterized in that: The thermal control measuring point and an adapter installed at the thermal control measuring point are provided, and the adapter is the adapter as described in any one of claims 1 to 9.