阅读说明：本技术 一种基于燃气轮机转速的监测预测系统 (Monitoring and predicting system based on rotating speed of gas turbine ) 是由 王鹂辉 卢涛 韩飞 于 2021-07-26 设计创作，主要内容包括：本发明公开了一种基于燃气轮机转速的监测预测系统,涉及燃气轮机技术领域,包括燃气轮机壳体、燃气轮机封闭盖和顶端封闭盖,燃气轮机壳体的内部转动连接有转动主轴,转动主轴的外侧开设有主轴安装槽,主轴安装槽的内部卡接有感应转子,转动主轴贯穿燃气轮机封闭盖,本发明的有益效果为：通过采用电磁感应的原理,通过转动的转动主轴作为主要的驱动源,从而带动感应转子旋转,对感应线圈内的磁感线进行切割,进而产生电流,利用电流感应器对电流进行收集并记录,从而监测当前情况下转动主轴的转动速度,并且感应转子和感应线圈之间产生的电流也可以当做电磁铁的电力供给源,使燃气轮机壳体和燃气轮机封闭盖之间的连接更加稳定,安全性更高。(The invention discloses a monitoring and predicting system based on the rotating speed of a gas turbine, which relates to the technical field of gas turbines and comprises a gas turbine shell, a gas turbine sealing cover and a top end sealing cover, wherein the inside of the gas turbine shell is rotatably connected with a rotating main shaft, the outer side of the rotating main shaft is provided with a main shaft mounting groove, an induction rotor is clamped inside the main shaft mounting groove, and the rotating main shaft penetrates through the gas turbine sealing cover, and the beneficial effects of the invention are that: through the principle that adopts electromagnetic induction, as main driving source through the pivoted main shaft that rotates, thereby it is rotatory to drive induction rotor, cut the magnetic induction line in the induction coil, and then produce the electric current, utilize the current inductor to collect and the record current, thereby the slew velocity of rotation main shaft under the monitoring current situation, and the electric current that produces between induction rotor and the induction coil also can be as the power supply source of electro-magnet, make the connection between gas turbine casing and the gas turbine closing cap more stable, the security is higher.)

1. A monitoring device based on gas turbine rotational speed, includes gas turbine casing (1), gas turbine closing cap (2) and top closing cap (10), its characterized in that: the gas turbine sealing cover is characterized in that a rotating main shaft (3) is rotatably connected to the inside of a gas turbine shell (1), a main shaft mounting groove (4) is formed in the outer side of the rotating main shaft (3), an induction rotor (5) is clamped in the main shaft mounting groove (4), the rotating main shaft (3) penetrates through a gas turbine sealing cover (2), an induction coil (6) is fixedly mounted on one side, close to the gas turbine shell (1), of the gas turbine sealing cover (2) and located in the induction coil (6), a current inductor (7) is fixedly mounted on one side of the gas turbine sealing cover (2), fourth inserting holes (17) are formed in two corresponding sides of the inner wall of the gas turbine sealing cover (2), an electromagnet (18) is fixedly mounted on one side, located in the fourth inserting holes (17), of the gas turbine sealing cover (2), the induction rotor (5) and the induction coil (6) are electrically connected with the current inductor (7), the current inductor (7) is electrically connected with the electromagnet (18).

2. The gas turbine rotational speed-based monitoring device according to claim 1, wherein: the inside of gas turbine closing cap (2) is provided with rolling bearing (12), gas turbine closing cap (2) is connected with rotation main shaft (3) rotation through rolling bearing (12), one side fixed mounting of top closing cap (10) has a plurality of first grafting post (11), rotate main shaft (3) inside seted up with first grafting post (11) first joint groove (8) of cooperation, second joint groove (9) have been seted up to one side of induction rotor (5), first grafting post (11) insert the inside in first joint groove (8) and second joint groove (9).

3. The gas turbine rotational speed-based monitoring device according to claim 1, wherein: the gas turbine casing (1) inner wall corresponding both sides all fixed mounting have interior mounting box (13), one side fixed mounting of interior mounting box (13) inner wall has shrink spring (14), the internally mounted who just is located interior mounting box (13) of one side of shrink spring (14) has iron plug column (15), third spliced eye (16) have been seted up to one side of gas turbine casing (1) corresponding iron plug column (15), the inside of third spliced eye (16) and fourth spliced eye (17) is inserted in iron plug column (15).

4. The gas turbine rotational speed-based monitoring device according to claim 1, wherein: the gas turbine engine casing (1) corresponding both sides equal fixed mounting have second fixed block (20), the gas turbine engine closing cap (2) corresponding both sides equal fixed mounting have first fixed block (19), the inside threaded connection of first fixed block (19) has set screw (21), set screw (21) and second fixed block (20) threaded connection.

5. A gas turbine speed-based prediction system, characterized by: the method comprises the following steps:

s1: a step for calculating the current generated between the induction rotor (5) and the induction coil (6) by the electromagnetic effect in the rotation process of the rotating main shaft (3);

s2: a step for recording and calculating the change of the amount of current and the difference value in the same period of time;

s3: calculating current amount data in a next period using a difference value of the current amounts in the plurality of same periods;

s4: and converting the current amount prediction result obtained by prediction into a corresponding rotation speed capable of generating the current amount.

6. The gas turbine speed-based prediction system of claim 5, wherein: the step S2 of recording and calculating the change in the amount of current and the difference value in the same period of time includes:

s21: for every two seconds (X) generated during the rotation of the rotating spindle (3)¹-X²) Calculating the current difference between them;

s22: for every two minutes (Y) generated during the rotation of the rotating spindle (3)¹-Y²) The difference in the amount of current generated therebetween is calculated.

7. The gas turbine speed-based prediction system of claim 5, wherein: the step of calculating the current amount data in the next period using the difference of the current amounts in the plurality of same periods S3 includes:

s31: multiple groups of X¹And X²Current difference data of the generated currents are integrated, and data of changes among a plurality of groups of current differences are calculated;

s32: a plurality of groups Y¹And Y²The current difference data of the generated currents are integrated, and the data of the change among the multiple groups of current differences are calculated.

8. The gas turbine speed-based prediction system of claim 7, wherein: the multiple groups of X in S31 are required to be combined in the S4¹And X²The data information between are inserted into the corresponding Y in S32¹And Y²In the generation of data information.

9. The gas turbine speed-based prediction system of claim 5, wherein: in S4, the current amount to be generated in the future period is calculated according to the current rotation speed and the current amount, so as to obtain the rotation speed of the gas turbine in the future period.

Technical Field

The invention relates to the technical field of gas turbines, in particular to a monitoring and predicting system based on the rotating speed of a gas turbine.

Background

The gas turbine is an internal combustion type power machine which takes continuously flowing gas as a working medium to drive an impeller to rotate at high speed and converts the energy of fuel into useful work, and is a rotary impeller type heat engine, wherein an air compressor is used for sucking air from the external atmospheric environment and the air is gradually compressed by an axial flow type air compressor to be pressurized, and meanwhile, the air temperature is correspondingly increased; compressed air is pumped into a combustion chamber and is mixed with injected fuel to be combusted to generate high-temperature and high-pressure gas; then the gas turbine enters a turbine to do work through expansion, the turbine is pushed to drive a gas compressor and an external load rotor to rotate at a high speed, and a tool for converting chemical energy of gas or liquid fuel into mechanical work is realized, so that the rotating speed of a main shaft of the gas turbine becomes one of important data of the output power of the gas turbine, and the rotating speed of the main shaft of the gas turbine has deviation within a certain range due to unstable fuel output, the speed of gas flow and the like.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a monitoring and predicting system based on the rotating speed of a gas turbine, and solves the problems in the background art.

In order to achieve the purpose, the invention is realized by the following technical scheme: a monitoring device based on the rotating speed of a gas turbine comprises a gas turbine shell, a gas turbine sealing cover and a top end sealing cover, wherein the inside of the gas turbine shell is rotatably connected with a rotating main shaft, the outer side of the rotating main shaft is provided with a main shaft mounting groove, an induction rotor is clamped inside the main shaft mounting groove, the rotating main shaft penetrates through the gas turbine sealing cover, one side, close to the gas turbine shell, of the gas turbine sealing cover is fixedly provided with an induction coil inside the induction coil, one side of the gas turbine sealing cover is fixedly provided with a current inductor, the two corresponding sides of the inner wall of the gas turbine sealing cover are respectively provided with a fourth inserting hole, one side, inside the gas turbine sealing cover and located in the fourth inserting hole, is fixedly provided with an electromagnet, and the induction rotor and the induction coil are both electrically connected with the current inductor, the current sensor is electrically connected with the electromagnet.

Optionally, a rotating bearing is arranged inside the gas turbine sealing cover, the gas turbine sealing cover is rotatably connected with the rotating main shaft through the rotating bearing, a plurality of first inserting columns are fixedly mounted on one side of the top sealing cover, a first clamping groove matched with the first inserting columns is formed in the rotating main shaft, a second clamping groove is formed in one side of the induction rotor, and the first inserting columns are inserted into the first clamping groove and the second clamping groove.

Optionally, the inner wall of the gas turbine casing is fixedly provided with an inner mounting box at two corresponding sides, a contraction spring is fixedly arranged at one side of the inner wall of the inner mounting box, an iron inserting column is arranged at one side of the contraction spring and inside the inner mounting box, a third inserting hole is formed in one side of the iron inserting column corresponding to the gas turbine casing, and the iron inserting column is inserted into the third inserting hole and the fourth inserting hole.

Optionally, the equal fixed mounting in both sides that the gas turbine casing is corresponding has the second fixed block, the equal fixed mounting in both sides that the gas turbine closing cap is corresponding has first fixed block, the inside threaded connection of first fixed block has the set screw, set screw and second fixed block threaded connection.

A gas turbine speed based prediction system comprising the steps of:

s1: calculating the current generated between the induction rotor and the induction coil by using the electromagnetic effect in the rotating process of the rotating main shaft;

s2: a step for recording and calculating the change of the amount of current and the difference value in the same period of time;

s3: calculating current amount data in a next period using a difference value of the current amounts in the plurality of same periods;

s4: and converting the current amount prediction result obtained by prediction into a corresponding rotation speed capable of generating the current amount.

Optionally, the step of S2 for recording and calculating the change of the current amount and the difference value in the same time period includes:

s21: for every two seconds (X) generated during the rotation of the rotating spindle¹-X²) Calculating the current difference between them;

s22: forFor every two minutes (Y) produced during rotation of the rotating spindle¹-Y²) Calculating the difference of the generated current quantities;

optionally, the step of calculating the current amount data in the next time period by using the difference between the current amounts in the plurality of same time periods at S3 includes:

s31: multiple groups of X¹And X²Current difference data of the generated currents are integrated, and data of changes among a plurality of groups of current differences are calculated;

s32: a plurality of groups Y¹And Y²The current difference data of the generated currents are integrated, and the data of the change among the multiple groups of current differences are calculated.

Optionally, multiple groups of X in S31 are required in S4¹And X²The data information between are inserted into the corresponding Y in S32¹And Y²In the generation of data information.

Alternatively, in S4, the current amount to be generated in the future period is calculated according to the ratio between the current rotation speed and the current amount, so as to obtain the rotation speed of the gas turbine in the future period.

The invention provides a monitoring and predicting system based on the rotating speed of a gas turbine, which has the following beneficial effects:

1. this a monitoring prediction system based on gas turbine rotational speed, through the principle that adopts electromagnetic induction, through pivoted rotation main shaft as main driving source, thereby it is rotatory to drive induction rotor, cut the magnetic induction line in the induction coil, and then produce electric current, utilize the current inductor to collect and the record the electric current, thereby the rotational speed of rotation main shaft under the monitoring current situation, and the electric current that produces between induction rotor and the induction coil also can be regarded as the power supply source of electro-magnet, make the connection between gas turbine casing and the gas turbine closing cap more stable, the security is higher.

2. According to the monitoring and predicting system based on the rotating speed of the gas turbine, the data of the current magnitude in the corresponding time is selected at regular time, different data are compared, the difference value of the current magnitude in a period of time is confirmed, the data of the current magnitude in a short time is calculated according to an averaging method and the like after the data of the current magnitude in a longer time is compared, and the rotating speed is calculated according to the ratio between the current rotating speed and the current magnitude.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the expanded structure of the present invention;

FIG. 3 is a schematic view of the top end closure of the present invention;

FIG. 4 is an enlarged view taken at A of FIG. 1 in accordance with the present invention;

FIG. 5 is an enlarged view of the invention at B in FIG. 1;

FIG. 6 is a schematic flow chart of the present invention.

In the figure: 1. a gas turbine casing; 2. a gas turbine engine closure cap; 3. rotating the main shaft; 4. a main shaft mounting groove; 5. an induction rotor; 6. an induction coil; 7. a current sensor; 8. a first clamping groove; 9. a second clamping groove; 10. a top end closure cap; 11. a first plug-in column; 12. a rotating bearing; 13. an inner mounting box; 14. a retraction spring; 15. iron plug columns; 16. a third plug hole; 17. a fourth plug hole; 18. an electromagnet; 19. a first fixed block; 20. a second fixed block; 21. and fixing the screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

The first embodiment is as follows:

referring to fig. 1 to 5, a monitoring device based on the rotation speed of a gas turbine includes a gas turbine housing 1, a gas turbine sealing cover 2 and a top end sealing cover 10, the inside of the gas turbine housing 1 is rotatably connected with a rotating main shaft 3, the outer side of the rotating main shaft 3 is provided with a main shaft installation groove 4, an induction rotor 5 is clamped inside the main shaft installation groove 4, the rotating main shaft 3 penetrates through the gas turbine sealing cover 2, an induction coil 6 is fixedly installed inside the induction coil 6 and on one side of the gas turbine sealing cover 2 close to the gas turbine housing 1, a current inductor 7 is fixedly installed on one side of the gas turbine sealing cover 2, fourth insertion holes 17 are respectively formed on two corresponding sides of the inner wall of the gas turbine sealing cover 2, an electromagnet 18 is fixedly installed inside the gas turbine sealing cover 2 and on one side of the fourth insertion holes 17, the induction rotor 5 and the induction coil 6 are electrically connected with the current inductor 7, the current sensor 7 is electrically connected with the electromagnet 18.

Wherein, the inside of gas turbine closing cap 2 is provided with rolling bearing 12, gas turbine closing cap 2 rotates with rotation main shaft 3 through rolling bearing 12 and is connected, one side fixed mounting of top closing cap 10 has a plurality of first grafting posts 11, 3 inside setups with the first joint groove 8 of first grafting post 11 cooperation of rotating main shaft, second joint groove 9 has been seted up to one side of response rotor 5, first grafting post 11 inserts the inside of first joint groove 8 and second joint groove 9, thereby fix response rotor 5 inside the main shaft mounting groove 4 on rotation main shaft 3 surface from the side through inserting first grafting post 11 into the inside of first joint groove 8 and second joint groove 9, make response rotor 5 fly out under the effect of centrifugal force when avoiding rotating main shaft 3 to rotate.

Wherein, the equal fixed mounting in both sides that the inner wall of gas turbine casing 1 is corresponding has interior mounting box 13, one side fixed mounting of interior mounting box 13 inner wall has shrink spring 14, shrink spring 14's one side and the internally mounted who is located interior mounting box 13 have iron peg graft post 15, third spliced eye 16 has been seted up to one side of the corresponding iron peg graft post 15 of gas turbine casing 1, iron peg graft post 15 inserts the inside of third spliced eye 16 and fourth spliced eye 17, induction rotor 5 and induction coil 6 produce the electric current when rotating main shaft 3 is rotatory, and with current transmission to the inside of electro-magnet 18, thereby can make electro-magnet 18 produce magnetic force, attract iron peg graft post 15, let iron peg graft post 15 insert the inside of fourth spliced eye 17, increase the stability of connecting between gas turbine casing 1 and the gas turbine closing cap 2.

Wherein, the equal fixed mounting in both sides that gas turbine casing 1 is corresponding has second fixed block 20, the equal fixed mounting in both sides that gas turbine closing cap 2 is corresponding has first fixed block 19, the inside threaded connection of first fixed block 19 has set screw 21, set screw 21 and the 20 threaded connection of second fixed block utilize set screw 21 to insert the inside of first fixed block 19 and second fixed block 20, fix gas turbine casing 1 and gas turbine closing cap 2 from the outside.

Example two:

referring to FIG. 6, a system for predicting gas turbine rotational speed includes the following steps:

s1: a step for calculating the current generated between the induction rotor 5 and the induction coil 6 by the electromagnetic effect during the rotation of the rotating spindle 3;

s2: a step for recording and calculating the change of the amount of current and the difference value in the same period of time;

s3: calculating current amount data in a next period using a difference value of the current amounts in the plurality of same periods;

s4: and converting the current amount prediction result obtained by prediction into a corresponding rotation speed capable of generating the current amount.

Wherein: the step S2 of recording and calculating the change in the amount of current and the difference value in the same period of time includes:

s21: for every two seconds (X) generated during the rotation of the rotating spindle 3¹-X²) Calculating the current difference between them;

s22: for every two minutes (Y) generated during the rotation of the rotating spindle 3¹-Y²) Calculating the difference of the generated current quantities;

wherein: the step of calculating the current amount data in the next period using the difference of the current amounts in the plurality of same periods S3 includes:

s31: multiple groups of X¹And X²Current difference data of the generated currents are integrated, and data of changes among a plurality of groups of current differences are calculated;

s32: a plurality of groups Y¹And Y²Integrating the current difference data of the generated currents, and calculating multiple groups of currentsData of variation between differences.

Wherein: the multiple groups of X in S31 are required to be combined in the S4¹And X²The data information between are inserted into the corresponding Y in S32¹And Y²In the generation of data information.

Wherein: in S4, the current amount to be generated in the future period is calculated according to the current rotation speed and the current amount, so as to obtain the rotation speed of the gas turbine in the future period.

In summary, in the monitoring and predicting system based on the gas turbine rotation speed, when in use, the rotating main shaft 3 drives the induction rotor 5 to rotate so as to cooperate with the induction coil 6 to generate current, the current sensor 7 is used for recording the numerical value of the current, the current is input into the electromagnet 18 at the same time, the electromagnet 18 generates magnetism, the iron inserting column 15 generates attraction force, the iron inserting column 15 is inserted into the fourth inserting hole 17, the stability of connection between the gas turbine shell 1 and the gas turbine closed cover 2 is further improved, and the current data (X) between two adjacent seconds can be selected when the gas turbine rotation speed is predicted (X is the number of seconds)¹-X²) And for multiple groups of X¹And X²The difference between the two is calculated, and X is selected¹And X²Simultaneously selecting the current amount data (Y) between two adjacent minutes¹-Y²) And is combined with Y¹And Y²The difference between the two and the corresponding multiple X¹And X²Comparing the difference values to determine that the data is correct, then calculating the current amount data in the next time period, and converting the current amount prediction result obtained by prediction into the corresponding rotating speed capable of generating the current amount.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.