CN214535541U - Mounting structure of steam turbine speed sensor - Google Patents
Mounting structure of steam turbine speed sensor Download PDFInfo
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- CN214535541U CN214535541U CN202023087017.5U CN202023087017U CN214535541U CN 214535541 U CN214535541 U CN 214535541U CN 202023087017 U CN202023087017 U CN 202023087017U CN 214535541 U CN214535541 U CN 214535541U
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- speed sensor
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- mounting sleeve
- steam turbine
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Abstract
The utility model belongs to the technical field of steam turbine detection, and discloses a mounting structure of a steam turbine speed sensor, which comprises a gear case shell, wherein a mounting hole is formed in the gear case shell, the mounting structure also comprises a mounting sleeve arranged in the mounting hole, one end of the mounting sleeve penetrates through the mounting hole and enters the interior of the gear case shell, and the other end of the mounting sleeve is positioned outside the gear case shell; the rotating speed sensor is inserted in the mounting sleeve, and two ends of the rotating speed sensor respectively extend out of two ends of the mounting sleeve; the outer wall of the mounting sleeve is provided with an external thread, the part of the mounting sleeve, which is positioned outside the gear box shell, is sleeved with a first fixing nut, and the first fixing nut is in contact with the outer surface of the gear box shell. The utility model discloses in, the telescopic tip of installation is higher than the surface of gear box shell, and the telescopic tip of installation is stretched out to speed sensor's tip, and is more easy to assemble, and the first fixation nut of accessible fastens, is difficult not hard up.
Description
Technical Field
The utility model belongs to the technical field of the steam turbine detects, specifically speaking relates to a steam turbine speed sensor's mounting structure.
Background
The rotating speed is one of important parameters needing to be monitored in the operation of the steam turbine, and the accurate installation and debugging of the rotating speed sensor determine the reliability of monitoring the rotating speed parameters of the steam turbine. A rotating speed sensor in the prior art is short, a mounting device of the rotating speed sensor is recessed into a gear box shell and mounted inside, and one end of a connecting signal wire of the rotating speed sensor is recessed into the mounting device and fixed inside. The installation mode can not lock the installation device and the rotating speed sensor, and the installation device and the rotating speed sensor are easy to loosen due to vibration in the operation process of the steam turbine, so that the gap between one end, used for detection, of the rotating speed sensor and a gear of the steam turbine is changed, and the accuracy of detection data is influenced.
On the other hand, the installation mode is complex in actual operation, so that the rotating speed sensor is not easy to detach and install, and inconvenience is brought to adjustment of the installation position of the rotating speed sensor and overhaul of the rotating speed sensor. Meanwhile, the end of the rotation speed sensor is difficult to be plugged and detached with a plug connected with a signal wire.
In view of this, the present invention is especially provided.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in overcoming prior art's is not enough, provides a steam turbine speed sensor's mounting structure, and the telescopic tip of installation is higher than the surface of gear box shell, and speed sensor's tip stretches out the telescopic tip of installation, and more easy to assemble is fixed, and the reliability is higher.
In order to solve the technical problem, the utility model adopts the following basic concept:
a mounting structure of a steam turbine rotating speed sensor comprises a gear box shell, wherein a mounting hole is formed in the gear box shell, the mounting structure further comprises a mounting sleeve arranged in the mounting hole, one end of the mounting sleeve penetrates through the mounting hole to enter the gear box shell, and the other end of the mounting sleeve is positioned on the outer side of the gear box shell;
the rotating speed sensor is inserted in the mounting sleeve, and two ends of the rotating speed sensor respectively extend out of two ends of the mounting sleeve; the outer wall of the mounting sleeve is provided with an external thread, the part of the mounting sleeve, which is positioned outside the gear box shell, is sleeved with a first fixing nut, and the first fixing nut is in contact with the outer surface of the gear box shell.
Furthermore, the inner wall of the mounting hole is provided with an internal thread matched with the external thread on the mounting sleeve, and the mounting sleeve is detachably connected with the gear box shell through the thread.
Further, the rotating speed sensor and the mounting sleeve are detachably connected through threads; the outer wall of the rotating speed sensor is provided with an external thread with a certain extending length, and the inner wall of the mounting sleeve is provided with an internal thread matched with the external thread on the rotating speed sensor.
Further, the extension length of the external thread on the rotating speed sensor is larger than that of the mounting sleeve.
Furthermore, a second fixing nut is sleeved on the part, extending into the gear box shell, of the rotating speed sensor, and the second fixing nut and the end face, located at one end of the gear box shell, of the mounting sleeve are in contact arrangement.
Furthermore, a third fixing nut is sleeved on the part, located inside the gear box shell, of the mounting sleeve, and the third fixing nut is arranged in contact with the inner side surface of the gear box shell.
Furthermore, a plurality of mounting holes are formed in the gear box shell, and the mounting sleeve and the rotating speed sensor are mounted in each mounting hole respectively.
Further, the gear box shell is provided with an arc surface, the mounting holes are formed in the arc surface, and the plurality of mounting holes are uniformly distributed along the circumferential direction of the arc surface.
Further, the distances between the end face of one end, extending into the gearbox shell, of the plurality of rotating speed sensors and the inner side surface of the gearbox shell are equal.
Furthermore, the rotation speed sensor is located one end of the outer side of the gear box shell and is connected with an aviation plug in an inserting mode, and the aviation plug is connected with a signal line.
After the technical scheme is adopted, compared with the prior art, the utility model following beneficial effect has.
The utility model discloses a steam turbine revolution speed sensor's mounting structure, wherein, the telescopic tip of installation is higher than the surface of gear box shell, and revolution speed sensor's tip stretches out the telescopic tip of installation, and more easy to assemble and dismantlement, accessible cover establish first fixation nut and fasten on the installation sleeve simultaneously, and mounting structure is difficult not hard up, and revolution speed sensor can not take place the displacement at steam turbine operation in-process, and the data that detect are accurate more reliable.
The utility model discloses in, can dismantle through the screw thread respectively between installation sleeve and the gear box shell, revolution speed sensor and the installation sleeve and be connected, installation and dismantlement easy operation. The extension length of the external thread on the rotating speed sensor is greater than that of the mounting sleeve, the structure is more stable, and the relative position of the rotating speed sensor and the mounting sleeve can be conveniently adjusted. The second fixing nut is sleeved on the rotating speed sensor, so that the relative position of the rotating speed sensor and the mounting sleeve is more stable and is not easy to change.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a schematic view of an installation structure of a steam turbine speed sensor according to an embodiment of the present invention.
In the figure: 1. a gearbox housing; 2. installing a sleeve; 3. a rotational speed sensor; 4. a first fixing nut; 5. a second fixing nut; 6. an aviation plug; 7. and a signal line.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the mounting structure of the steam turbine rotation speed sensor according to the embodiment of the present invention includes a gear box housing 1, and a mounting hole is formed on the gear box housing 1. The mounting structure further comprises a mounting sleeve 2 mounted in the mounting hole, one end of the mounting sleeve 2 penetrates through the mounting hole to enter the gear box shell 1, and the other end of the mounting sleeve is located on the outer side of the gear box shell 1.
The rotating speed sensor 3 is inserted in the mounting sleeve 2, and the upper end and the lower end of the rotating speed sensor 3 respectively extend out of the upper end and the lower end of the mounting sleeve 2. The outer wall of the mounting sleeve 2 is provided with an external thread, the part of the mounting sleeve 2, which is located on the outer side of the gear box shell 1, is sleeved with a first fixing nut 4, and the first fixing nut 4 is in contact with the outer surface of the gear box shell 1.
In the above scheme, the upper end of the mounting sleeve 2 is higher than the outer surface of the gear box shell 1, and the upper end of the rotating speed sensor 3 extends out of the upper end of the mounting sleeve 2. Compare with the mode of speed sensor 3 recess gear box shell 1 internally mounted among the prior art, the mounting structure of this embodiment makes things convenient for the staff to install and the operation of dismantling more. Meanwhile, the mounting sleeve 2 is sleeved with the first fixing nut 4 for fastening, and the mounting structure is more stable and is not easy to loosen. In the operation process of the steam turbine, the integral structure of the mounting sleeve 2 and the rotating speed sensor 3 cannot be displaced due to vibration, so that the gap between the lower end of the rotating speed sensor 3 and the steam turbine gear can be kept unchanged, and the detected data is more accurate and reliable.
In the further scheme of this embodiment, have the internal thread that matches with the external screw thread on the installation sleeve 2 on the inner wall of mounting hole, installation sleeve 2 passes through the screw thread with gear box shell 1 and can dismantle the connection.
The rotating speed sensor 3 and the mounting sleeve 2 are detachably connected through threads. The outer wall of the rotating speed sensor 3 is provided with an external thread with a certain extending length, and the inner wall of the mounting sleeve 2 is provided with an internal thread matched with the external thread on the rotating speed sensor 3.
In the above scheme, the installation sleeve 2 is detachably connected with the gear box shell 1, the rotating speed sensor 3 and the installation sleeve 2 through threads respectively, and the installation and the disassembly are simple in operation. Meanwhile, the threaded connection mode is more stable in the axial direction of the rotating speed sensor 3, and the condition that the rotating speed sensor 3 displaces in the axial direction in the operation process of the steam turbine is further avoided.
In a preferred embodiment of the present invention, the extension length of the external thread on the rotation speed sensor 3 is greater than the length of the mounting sleeve 2.
And the part of the rotating speed sensor 3 extending into the gear box shell 1 is sleeved with a second fixing nut 5, and the second fixing nut 5 and the mounting sleeve 2 are arranged in a manner of end face contact at one end inside the gear box shell 1.
In above-mentioned scheme, the external screw thread extension length is greater than the length of installation sleeve 2 on speed sensor 3, makes installation sleeve 2 and speed sensor 3's relative position can adjust on the one hand, and in great adjustment range, and both contact surfaces are through the thread tightening all the time at the overall range, and the structure is more stable, and speed sensor 3 and the difficult change that takes place relative position of installation back of installation sleeve 2 are convenient for adjust speed sensor 3 and installation sleeve 2's relative position. On the other hand, the part of the lower end of the rotation speed sensor 3 extending out of the mounting sleeve 2 is also provided with an external thread, and the second fixing nut 5 can be sleeved for fixing, so that the stability of the relative position of the rotation speed sensor 3 and the mounting sleeve 2 is further enhanced.
In another scheme of this embodiment, a third fixing nut is sleeved on a portion of the mounting sleeve 2 located inside the gearbox housing 1, and the third fixing nut is arranged in contact with the inner side surface of the gearbox housing 1.
In the above scheme, the third fixing nut is established to 2 lower pot heads of installation sleeve, presss from both sides tight gear box shell 1 through third fixing nut and the cooperation of first fixing nut 4, fixes installation sleeve 2. The mounting sleeve 2 can still be connected with the gearbox housing 1 through threads at this time, and the third fixing nut can further enhance the stability of the relative position between the mounting sleeve 2 and the gearbox housing 1. The inner wall of the mounting hole in the gear box shell 1 can be free of internal threads, and the mounting sleeve 2 is simply inserted into the mounting hole to directly fix the position of the mounting sleeve 2 through the matching of the first fixing nut 4 and the third fixing nut.
In a further scheme of this embodiment, a plurality of mounting holes are formed in the gear box housing 1, and the mounting sleeve 2 and the rotation speed sensor 3 are respectively mounted in each mounting hole.
Preferably, the gear box housing 1 has a circular arc surface, the mounting holes are opened on the circular arc surface, and the plurality of mounting holes are uniformly distributed along the circumference of the circular arc surface.
The distances between the end surface of one end of the plurality of rotating speed sensors 3 extending into the gear box shell 1 and the inner side surface of the gear box shell 1 are equal.
In order to detect the rotating speed of the turbine rotating shaft, generally, a detection gear with teeth continuously distributed on the outer circumference is installed on the turbine rotating shaft, and the gear box shell 1 is correspondingly installed on the outer side of the detection gear. The rotating speed sensor 3 adopts a reluctance type rotating speed sensor, in the operating process of the steam turbine, the detection gear rotates along with the rotating shaft of the steam turbine, and the gap between the tooth top of the corresponding detection gear and the lower end of the rotating speed sensor 3 is periodically changed, so that the periodically changed induced potential is generated, and the rotating speed of the rotating shaft of the steam turbine can be measured.
In this embodiment, a plurality of evenly distributed revolution speed sensors 3 are installed on the gear box housing 1, and a plurality of positions in the circumferential direction are detected respectively, so that the measurement of the revolution speed is more accurate. The distances between the lower ends of the plurality of rotating speed sensors 3 and the inner side surface of the gear box shell 1 are equal, namely the gaps between the lower ends of the plurality of rotating speed sensors 3 and the tops of the detection gears are the same, and the detection conditions of the plurality of rotating speed sensors 3 are guaranteed to be the same.
In a further scheme of this embodiment, the rotation speed sensor 3 is located one end of the gearbox housing 1 outside and is pegged graft with the aviation plug 6, aviation plug 6 is connected with signal line 7.
In the above scheme, the aviation plug 6 is adopted to connect the upper end of the rotating speed sensor 3 with the signal line 7, so that the connection and disassembly operations are simple, and the operation of workers is facilitated.
In this embodiment, when the rotation speed sensor 3 is installed, the rotation speed sensor 3 is inserted into the installation sleeve 2, the relative position between the rotation speed sensor 3 and the installation sleeve 2 is adjusted, then the second fixing nut 5 is sleeved on the lower end of the rotation speed sensor 3, and is rotated to be in contact with the lower end face of the installation sleeve 2, so that the relative position between the rotation speed sensor 3 and the installation sleeve 2 is fixed. Then insert the whole that installation sleeve 2 and speed sensor 3 formed in the mounting hole, rotate to suitable position, make the clearance between speed sensor 3 lower extreme and the detection gear reach required distance, embolia first fixation nut 4 from installation sleeve 2 upper end again, revolve it to with the external surface contact of gear box shell 1, fix the position of installation sleeve 2. And finally, inserting the aviation plug 6 connected with the signal wire 7 at the upper end of the rotating speed sensor 3, namely completing the installation of the rotating speed sensor 3.
Because the upper end of installation sleeve 2 is higher than the surface of gear box shell 1, the upper end of rotational speed sensor 3 stretches out the upper end of installation sleeve 2, and the operation of installation and dismantlement is carried out to the staff more on the aspect. The upper end of the rotating speed sensor 3 extends out of the mounting sleeve 2, and is more easily inserted into and detached from the aviation plug 6. 2 upper ends of installation sleeve are higher than gear box shell 1, need not to take off installation sleeve 2 and speed sensor 3, can follow the light adjustment that realizes speed sensor 3 mounting height in gear box shell 1 outside to fix through first fixation nut 4 after the adjustment is ended, the structure is firm, and the rotational speed measuring result degree of accuracy is high, and is more reliable.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical spirit of the present invention still fall within the scope of the present invention.
Claims (10)
1. The mounting structure of the steam turbine rotating speed sensor comprises a gear box shell, wherein a mounting hole is formed in the gear box shell, and the mounting structure is characterized by further comprising a mounting sleeve arranged in the mounting hole, one end of the mounting sleeve penetrates through the mounting hole to enter the gear box shell, and the other end of the mounting sleeve is positioned on the outer side of the gear box shell;
the rotating speed sensor is inserted in the mounting sleeve, and two ends of the rotating speed sensor respectively extend out of two ends of the mounting sleeve; the outer wall of the mounting sleeve is provided with an external thread, the part of the mounting sleeve, which is positioned outside the gear box shell, is sleeved with a first fixing nut, and the first fixing nut is in contact with the outer surface of the gear box shell.
2. The mounting structure of a steam turbine speed sensor according to claim 1, wherein the inner wall of the mounting hole has an internal thread matching with an external thread of a mounting sleeve, and the mounting sleeve is detachably connected to the casing of the gear box by a thread.
3. The mounting structure of a steam turbine speed sensor according to claim 1, wherein the speed sensor and the mounting sleeve are detachably connected by a screw; the outer wall of the rotating speed sensor is provided with an external thread with a certain extending length, and the inner wall of the mounting sleeve is provided with an internal thread matched with the external thread on the rotating speed sensor.
4. A mounting structure for a steam turbine speed sensor according to claim 3, wherein the external thread of the speed sensor extends over a length greater than that of the mounting sleeve.
5. A mounting structure for a steam turbine speed sensor according to claim 3, wherein the portion of the speed sensor extending into the casing of the gearbox is provided with a second fixing nut, and the second fixing nut is in contact with the end face of the mounting sleeve at the end of the casing.
6. The mounting structure of a steam turbine speed sensor according to claim 1, wherein a third fixing nut is fitted over a portion of the mounting sleeve located inside the casing of the gearbox, and the third fixing nut is disposed in contact with an inner side surface of the casing of the gearbox.
7. The mounting structure for a steam turbine speed sensor according to any one of claims 1 to 6, wherein a plurality of mounting holes are formed in the gear housing, and the mounting sleeve and the speed sensor are mounted in each of the mounting holes.
8. The mounting structure of a steam turbine rotational speed sensor according to claim 7, wherein the gear case casing has a circular arc surface, the mounting holes are opened on the circular arc surface, and the plurality of mounting holes are uniformly distributed in a circumferential direction of the circular arc surface.
9. A mounting structure for a steam turbine speed sensor according to claim 7, wherein the distances between the end surfaces of the plurality of speed sensors which extend into the interior of the casing and the inner side surface of the casing are equal.
10. A mounting structure for a steam turbine speed sensor according to any one of claims 1 to 6, wherein the speed sensor is inserted into an aviation plug at an end located outside a casing of the gearbox, and the aviation plug is connected to a signal line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023087017.5U CN214535541U (en) | 2020-12-18 | 2020-12-18 | Mounting structure of steam turbine speed sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023087017.5U CN214535541U (en) | 2020-12-18 | 2020-12-18 | Mounting structure of steam turbine speed sensor |
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| CN214535541U true CN214535541U (en) | 2021-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023087017.5U Active CN214535541U (en) | 2020-12-18 | 2020-12-18 | Mounting structure of steam turbine speed sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114233987A (en) * | 2021-11-22 | 2022-03-25 | 华能国际电力股份有限公司大连电厂 | TSI sensor connection structure |
-
2020
- 2020-12-18 CN CN202023087017.5U patent/CN214535541U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114233987A (en) * | 2021-11-22 | 2022-03-25 | 华能国际电力股份有限公司大连电厂 | TSI sensor connection structure |
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