CN113267265B - Gas temperature measurement system of gas turbine, gas turbine and temperature measurement method - Google Patents
Gas temperature measurement system of gas turbine, gas turbine and temperature measurement method Download PDFInfo
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- CN113267265B CN113267265B CN202110556198.1A CN202110556198A CN113267265B CN 113267265 B CN113267265 B CN 113267265B CN 202110556198 A CN202110556198 A CN 202110556198A CN 113267265 B CN113267265 B CN 113267265B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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Abstract
The invention discloses a gas temperature measurement system of a gas turbine, the gas turbine and a temperature measurement method, which comprise a sealing box, a heat insulating part, a temperature reference part, a connector, an armoured wire, a first thermocouple and a second thermocouple, wherein the sealing box is suitable for being arranged in a measurement cavity, the heat insulating part is arranged in the sealing box, the temperature reference part is arranged on the heat insulating part, the connector is arranged on the temperature reference part, heat conduction can be realized between the connector and the temperature reference part, the inner end of the armoured wire is connected with the connector, the outer end of the armoured wire penetrates out of the sealing box and is sealed between the armoured wire and the box wall of the sealing box, the wire of the first thermocouple penetrates through the box wall of the sealing box in a sealing way to be connected with the connector, the second thermocouple is arranged on the temperature reference part and is used for measuring the temperature of the temperature reference part, and the wire of the second thermocouple penetrates out of the sealing box and is sealed between the wire and the box wall of the sealing box. The gas temperature measurement system can avoid the influence of higher measurement environment temperature, and has high temperature measurement precision and low cost.
Description
Technical Field
The invention relates to the technical field of gas turbines, in particular to a gas temperature measurement system of a gas turbine and the gas turbine with the measurement system.
Background
In the related art, in order to ensure the measurement accuracy, the high-temperature gas of the gas turbine generally adopts a high-temperature-resistant thermocouple to perform temperature measurement, and the first thermocouple contains noble metals such as platinum, rhodium and the like, so that the cost of the first thermocouple is high. In order to reduce the use length of the first thermocouple to reduce the cost, there are also related technologies in which the first thermocouple is connected to a compensating wire (inexpensive metal wire), but the compensating wire can only be used at a certain ambient temperature, and when the ambient temperature is high, the error of the compensating wire is large and the accuracy of temperature measurement is low.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, the embodiment of the invention provides a gas temperature measurement system for a gas turbine, which can avoid the influence of higher measured ambient temperature, has high temperature measurement precision and low cost.
The embodiment of the invention also provides a gas turbine applying the gas temperature measurement system for the gas turbine.
The embodiment of the invention also provides a gas temperature measuring method of the gas turbine, which is applied to the gas temperature measuring system for the gas turbine.
A gas temperature measurement system for a gas turbine according to an embodiment of the present invention includes a seal box adapted to be disposed within a measurement volume; the heat insulation piece is arranged in the sealing box; a temperature reference member provided on the heat insulating member to insulate heat between the heat insulating member and the sealing case; the joint is arranged on the temperature reference piece, and heat can be conducted between the joint and the temperature reference piece; the inner end of the armored wire is connected with the connector, the outer end of the armored wire penetrates out of the sealing box, and the armored wire is sealed with the box wall of the sealing box; a first thermocouple for mounting at a temperature measurement site within the measurement volume, the leads of the first thermocouple sealingly passing through the box wall of the sealed box to connect with the junction; and the second thermocouple is arranged on the temperature reference piece and used for measuring the temperature of the temperature reference piece, and a wire of the second thermocouple penetrates out of the sealing box and is sealed with the box wall of the sealing box.
According to the gas temperature measurement system for the gas turbine, provided by the embodiment of the invention, the influence of higher measurement environment temperature can be avoided, the measurement accuracy of the temperature is high, and the cost is low.
In some embodiments, the sealing box comprises a box body and a box cover, the heat insulating piece, the temperature reference piece and the joint are all arranged in the box body, one side of the box body is open, and the box cover is detachably and hermetically arranged at the open position of the box body.
In some embodiments, one of the open end face of the box body and the box cover is provided with an annular groove, and the other is provided with an annular flange, and the annular flange is matched in the annular groove.
In some embodiments, the temperature reference and the sheathed wire are both copper.
In some embodiments, the connector comprises a first connector and a second connector, the first connector and the second connector are connected, the inner end of the armored wire is connected with the first connector, and the wire of the first thermocouple is connected with the second connector.
In some embodiments, a first hole and a second hole are formed in the box wall of the sealing box, a first sealing cutting sleeve is matched in the first hole, the armored wire passes through the first sealing cutting sleeve in a sealing mode, a second sealing cutting sleeve is matched in the second hole, and the wire of the first thermocouple passes through the first sealing cutting sleeve in a sealing mode.
In some embodiments, the plurality of connectors are all mounted on the temperature reference member, the plurality of armoured wires are connected with the plurality of connectors in a one-to-one correspondence, the plurality of first thermocouples are connected with the plurality of connectors in a one-to-one correspondence.
In some embodiments, the plurality of first thermocouples are divided into a plurality of groups, each group including at least one of the first thermocouples, the first thermocouples of each group being used to monitor the same temperature site location.
In some embodiments, the gas temperature measurement system further comprises a third sealing ferrule located outside the box body, through which third sealing ferrule a plurality of the armored wires are all sealed.
A gas turbine according to an embodiment of the present invention includes an exhaust pipe and a temperature measurement system installed at an outlet position of the exhaust pipe, the temperature measurement system being the gas temperature measurement system for a gas turbine according to any one of the embodiments.
The gas temperature measurement method for the gas turbine according to the embodiment of the invention comprises the following steps: installing a probe of a first thermocouple at the position of the temperature measuring point; installing the sealing box at a position close to the temperature measuring point; obtaining a thermoelectric voltage V1 through a first thermocouple and an armored wire, and obtaining a thermoelectric voltage V2 through a second thermocouple; summing the thermoelectric voltage V1 and the thermoelectric voltage V2 and obtaining a total thermoelectric voltage V3; the total thermal potential V3 is converted and the temperature of the temperature measuring point is obtained.
Drawings
FIG. 1 is an overall cross-sectional schematic view of a gas temperature measurement system for a gas turbine according to an embodiment of the invention.
Fig. 2 is a schematic view of an in-box structure of a gas temperature measurement system for a gas turbine according to an embodiment of the present invention.
FIG. 3 is an exploded schematic view of a seal cartridge for a gas temperature measurement system of a gas turbine according to an embodiment of the present invention.
FIG. 4 is a schematic view of a partial structure of a gas turbine according to an embodiment of the present invention.
Reference numerals:
A gas temperature measurement system 100;
a seal box 1; a case 11; an annular groove 111; a lid 12;
A heat insulating member 2;
A temperature reference 3;
a joint 4; a first joint 41; a second joint 42;
Armoured wires 5;
A first thermocouple 6;
a second thermocouple 7;
a first sealing ferrule 8;
a second sealing ferrule 9;
A third sealing ferrule 10;
And an exhaust pipe 200.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
As shown in fig. 1 to 3, a gas temperature measurement system 100 for a gas turbine (hereinafter referred to as gas temperature measurement system 100) according to an embodiment of the present invention includes a seal case 1, a heat insulating member 2, a temperature reference member 3, a joint 4, an armoured wire 5, a first thermocouple 6, and a second thermocouple 7.
The sealing box 1 is adapted to be arranged in a measurement volume. Specifically, an inner cavity is arranged in the sealing box 1, and the inner cavity of the sealing box 1 is sealed relatively. The seal box 1 is used for being installed in a measurement cavity of a temperature to be measured, the measurement cavity can be Wen Rongqiang, the Gao Wenrong cavity can be a cavity of which the temperature is higher than 100 ℃, for example, the measurement cavity can be a cavity of an exhaust pipe 200 of a gas turbine.
The heat insulator 2 is provided in the seal case 1. Specifically, as shown in fig. 1, the heat insulating member 2 may be a heat insulating plate or a heat insulating pad, the heat insulating member 2 is fixed in the sealed inner cavity, and the heat insulating member 2 has a good heat insulating effect.
A temperature reference member 3 is provided on the heat insulating member 2 to insulate heat between the heat insulating member 2 and the sealing case 1. Specifically, as shown in fig. 3, the temperature reference member 3 is fixed to the heat insulating member 2, and the temperature reference member 3 is not in contact with the inner wall of the seal case 1, whereby both the mounting fixation of the temperature reference member 3 in the seal case 1 and the heat insulation between the temperature reference member 3 and the seal case 1 are achieved.
The joint 4 is arranged on the temperature reference member 3, and heat can be conducted between the joint 4 and the temperature reference member 3. Specifically, as shown in fig. 3, the joint 4 may be a wire joint 4 or an electrical connector, the joint 4 is mounted on the temperature reference member 3, and the joint 4 is not in contact with the inner wall of the sealing case 1, and the joint 4 and the temperature reference member 3 have a good heat conduction effect, whereby the temperatures of the joint 4 and the temperature reference member 3 are substantially uniform.
The inner end of the armored wire 5 is connected with the connector 4, the outer end of the armored wire 5 penetrates out of the sealing box 1, and the armored wire 5 is sealed with the box wall of the sealing box 1. Specifically, as shown in fig. 1, the armored wire 5 may be a copper wire, the armored wire 5 passes through the wall of the sealed box 1, the armored wire 5 has an inner end located in the sealed box 1 and an outer end located outside the sealed box 1, the inner end of the armored wire 5 is electrically connected to the connector 4, the outer end of the armored wire 5 is used for being connected to a terminal device, and the terminal device may be a controller such as a calculator. The part of the armoured wire 5 passing through the wall of the sealed box 1 is sealingly connected to the wall, whereby the tightness of the sealed box 1 is ensured.
It should be noted that the thermoelectric force generated by the sheathed wire 5 at high temperature is negligible, so that the situation of large error of the compensation wire at high temperature can be avoided, and the accuracy of temperature measurement is ensured.
The first thermocouple 6 is used for being installed at the position of a temperature measuring point in the measuring cavity, and the lead wire of the first thermocouple 6 passes through the box wall of the sealing box 1 in a sealing way so as to be connected with the joint 4. Specifically, as shown in fig. 1, the first thermocouple 6 includes a probe and a wire, the probe of the first thermocouple 6 is located at the outer side of the sealed box 1, and the probe of the first thermocouple 6 is used for being installed at a temperature measuring point position of the measurement cavity, and the wire of the first thermocouple 6 passes through the box wall of the sealed box 1 in a sealing manner and is electrically connected with the joint 4. As a result, as shown in fig. 2, the first thermocouple 6, the joint 4, and the sheathed wire 5 are connected in series in the up-down direction, and the thermoelectric voltage V1 between the temperature measurement point and the joint 4 can be measured via the first thermocouple 6. In order to reduce the measurement error, the first thermocouple 6 should be a thermocouple, for example, the first thermocouple 6 may be an R-type thermocouple, a B-type thermocouple, an S-type thermocouple, or the like.
A second thermocouple 7 is mounted on the temperature reference member 3 and is used for measuring the temperature of the temperature reference member 3, and the wire of the second thermocouple 7 is penetrated from the inside of the sealing case 1 and sealed with the case wall of the sealing case 1. Specifically, as shown in fig. 1, the second thermocouple 7 includes a probe and a wire, the probe of the second thermocouple 7 is located in the sealed box 1 and connected to the temperature reference member 3, and the wire of the second thermocouple 7 is sealed through the box wall of the sealed box 1 and is used for electrical connection with the terminal equipment. Thereby, the thermoelectric voltage V2 between the temperature reference 3 and the terminal device can be measured via the second thermocouple 7. For the second thermocouple 7, an inexpensive metal thermocouple may be used, and for example, the second thermocouple 7 may be a K-type thermocouple, an N-type thermocouple, or the like, in order to reduce the cost.
It should be noted that, the second thermocouple 7 may be provided with more than one, when the second thermocouple 7 is provided with one, the measured value of the second thermocouple 7 is the thermoelectric voltage between the temperature reference member 3 and the terminal device, and when there are a plurality of second thermocouples 7, the measured values of the plurality of second thermocouples 7 may be averaged, and the average is the thermoelectric voltage between the temperature reference member 3 and the terminal device.
According to the gas temperature measurement system 100 for a gas turbine, in use, the probe of the first thermocouple 6 is installed at a temperature measurement point with temperature measurement, the sealing box 1 of the gas temperature measurement system 100 is installed at a position close to the temperature measurement point, the wires of the armored wire 5 and the second thermocouple 7 are electrically connected with terminal equipment, the thermoelectric voltage V1 is measured through the first thermocouple 6, the thermoelectric voltage V2 is measured through the second thermocouple 7, and the temperature value of the temperature measurement point can be obtained by summing up and converting the thermoelectric voltage V1 and the thermoelectric voltage V2.
The thermal potential generated by the armored wire 5 can be ignored, so that the condition that the gas temperature measurement system 100 is affected by temperature and has larger error is avoided, and the measurement accuracy is ensured. Due to the sealing box 1, the lead wire of the first thermocouple 6 only needs to be connected to the sealing box 1, the situation that the size of the first thermocouple 6 is long due to the fact that the lead wire of the first thermocouple 6 is required to be led out of a measuring container in the related technology is avoided, consumable materials of the first thermocouple 6 are reduced, and then the overall cost of the gas temperature measuring system 100 is reduced.
In addition, as the connection positions of the armored lead 5 and the connector 4, the connection positions of the first thermocouple 6 and the connector 4 and the connection positions of the second thermocouple 7 and the temperature reference piece 3 are all arranged in the sealing box 1, the sealing box 1 has a protection effect, can be used in an environment of 800 ℃ and can bear the pressure of 3 megapascals, the situation that each connection position is damaged by compression is avoided, the stable operation of a measuring system is ensured, the modularization and integration of the measuring system are improved, and the installation and the disassembly are further facilitated.
In some embodiments, the sealing box 1 comprises a box body 11 and a box cover 12, the heat insulating piece 2, the temperature reference piece 3 and the joint 4 are all arranged in the box body 11, one side of the box body 11 is open, and the box cover 12 is detachably and hermetically arranged at the open position of the box body 11. Specifically, as shown in fig. 3, the sealing case 1 includes a case 11 and a case cover 12, the case 11 is a square box shape, the case cover 12 is a rectangular plate, the case cover 12 is detachably mounted at an open position of the case 11, and for example, the case cover 12 may be fixed to the case 11 by a bolt and a nut. The box body 11 and the box cover 12 are arranged to facilitate the installation, disassembly and maintenance of the heat insulation part 2, the temperature reference part 3 and the joint 4.
The heat insulating member 2 and the temperature reference member 3 may be both rectangular plate-shaped, and the heat insulating member 2 is provided in the case 11 and fixed to the inner bottom of the case 11, for example, the heat insulating member 2 may be detachably connected to the bottom of the case 11 by bolts or screws. The temperature reference element 3 is arranged on the side of the insulating element 2 facing away from the cassette bottom, the temperature reference element 3 being also detachably connected to the insulating element 2 by means of bolts or screws.
The joint 4 is rectangular, the joint 4 is arranged on the side surface of the temperature reference member 3, which is away from the heat insulating member 2, and the joint 4 can be detachably connected with the temperature reference member 3 through bolts or screws.
Preferably, the case 11 and the cover are fixed by bolting, and a plurality of bolts are provided, each of which is provided on the outer peripheral side of the opening of the case 11 and is arranged at intervals along the circumferential direction of the opening of the case 11. The sealing balance and sealing effect are ensured.
In some embodiments, one of the open end face of the case 11 and the lid 12 is provided with an annular groove 111, and the other is provided with an annular flange (not shown) which fits within the annular groove 111. As shown in fig. 3, the annular groove 111 is provided on the case 11, specifically on the end face of the case 11 where the opening is located, the annular groove 111 is a ring of closed annular grooves, and the annular groove 111 surrounds the outer peripheral side of the opening. The annular flange is arranged on the box cover 12, the annular flange is a circle of closed bulges, the cross section shape of the annular flange is matched with the cross section shape of the annular groove 111, and when the box cover 12 is buckled on the box body 11, the annular flange is matched in the annular groove 111. The annular groove 111 and the annular flange have a labyrinth effect on one hand, enhance the sealing performance of the box cover 12 and the box body 11, and have a positioning effect on the other hand, and ensure the assembly precision of the box body 11 and the box cover 12.
In some embodiments, the temperature reference 3 and the sheathed wire 5 are both copper. Copper has better heat conductivity on one hand, so that the heat conduction effect between the temperature reference piece 3 and the joint 4 is guaranteed, and on the other hand, the thermoelectric potential generated by copper in a high-temperature environment is small and can be ignored, so that the accuracy of temperature measurement is guaranteed.
In some embodiments, the junction 4 comprises a first junction 41 and a second junction 42, the first junction 41 and the second junction 42 being connected, the inner end of the armoured wire 5 being connected to the first junction 41, the wire of the first thermocouple 6 being connected to the second junction 42. Specifically, as shown in fig. 2, the joint 4 includes a first joint 41 and a second joint 42, the first joint 41 and the second joint 42 are both fixed on the temperature reference member 3, and the first joint 41 and the second joint 42 are sequentially disposed along an up-down direction, wherein the first joint 41 is located above the second joint 42, the sheathed wire 5 is disposed above the joint 4 and electrically connected with the first joint 41, and the first thermocouple 6 is disposed below the joint 4 and electrically connected with the second joint 42. The first connector 41 and the second connector 42 may be electrically connected by a plug-in fit.
In some embodiments, a first hole and a second hole are formed in the wall of the sealing box 1, a first sealing cutting sleeve 8 is matched in the first hole, an armored wire 5 passes through the first sealing cutting sleeve 8 in a sealing mode, a second sealing cutting sleeve 9 is matched in the second hole, and a wire of the first thermocouple 6 passes through the first sealing cutting sleeve 8 in a sealing mode.
As shown in fig. 1 and 2, a first hole is formed in the upper side wall of the sealing box 1, a second hole is formed in the lower side wall of the sealing box 1, a first sealing clamping sleeve 8 is installed in the first hole, a second sealing clamping sleeve 9 is installed in the second hole, and the first sealing clamping sleeve 8 and the second sealing clamping sleeve 9 can be bolt sealing clamping sleeves. The periphery side of the first sealing cutting ferrule 8 is in sealing connection with the hole wall of the first hole, the armored wire 5 is in sealing connection with the hole wall of the second hole in sealing connection with the periphery side of the second sealing cutting ferrule 9, and the wire of the first thermocouple 6 passes through the second sealing cutting ferrule 9 in sealing connection with the hole wall of the second hole. The arrangement of the first sealing sleeve 8 and the second sealing sleeve 9 ensures the tightness of the sealing box 1.
In some embodiments, there are a plurality of joints 4, a plurality of joints 4 are mounted on the temperature reference member 3, a plurality of armoured wires 5 are provided, a plurality of armoured wires 5 are connected to the plurality of joints 4 in a one-to-one correspondence, a plurality of first thermocouples 6 are provided, and a plurality of first thermocouples 6 are connected to the plurality of joints 4 in a one-to-one correspondence.
As shown in fig. 2, the plurality of joints 4 are provided, and the plurality of joints 4 are provided on the temperature reference member 3 and are arranged in order in the left-right direction. The armoured wires 5 and the first thermocouples 6 are also provided with a plurality of armoured wires 5, which are uniformly and correspondingly electrically connected with the upper ends of the connectors 4, and the wires of the first thermocouples 6 are correspondingly electrically connected with the lower ends of the connectors 4. Therefore, the measurement values of the first thermocouples 6 can be obtained, so that errors generated when the first thermocouples 6 are fewer are avoided, and the measurement accuracy is guaranteed.
In some embodiments, the plurality of first thermocouples 6 are divided into a plurality of groups, each group including at least one first thermocouple 6, the first thermocouples 6 of each group being used to monitor the same temperature site location. Specifically, as shown in fig. 2, the plurality of first thermocouples 6 may be divided into three groups, each group of first thermocouples 6 includes three first thermocouples 6, and each group of three first thermocouples 6 is used for performing temperature monitoring on the same temperature measuring point position, thereby further ensuring the measurement accuracy of the same temperature measuring point position. In addition, the first thermocouple 6 is divided into a plurality of groups, and temperature monitoring can be carried out on different temperature measuring points at the same time, so that temperature data of different positions in the high-temperature container can be obtained, and the collection of numerical values is enriched.
In some embodiments, the gas temperature measurement system 100 further comprises a third sealing ferrule 10, the third sealing ferrule 10 being located outside the box 11, the plurality of armoured wires 5 each being sealed through the third sealing ferrule 10. Specifically, as shown in fig. 1 and 2, the third sealing ferrule 10 is used for being in sealing connection with the container wall of the measuring container, and the plurality of armored wires 5 are all arranged in the third sealing ferrule 10 in a penetrating manner, so that on one hand, the tightness of the measuring container can be ensured, on the other hand, the collection and arrangement of the plurality of armored wires 5 are realized, and the arrangement of the armored wires 5 is simplified.
It will be appreciated that in some embodiments the wires of the second thermocouple 7 may also be sealingly arranged in the third sealing collar 10.
A gas turbine according to an embodiment of the present invention is described below with reference to the accompanying drawings.
The gas turbine according to the embodiment of the present invention includes the exhaust pipe 200 and a temperature measurement system installed at an outlet position of the exhaust pipe 200, and the temperature measurement system may be the gas temperature measurement system 100 for a gas turbine described in the above embodiment.
Specifically, as shown in fig. 4, the probe of the first thermocouple 6 of the temperature measurement system may be installed at the temperature measurement point position of the exhaust pipe 200, the sealing box 1 of the temperature measurement system is installed in the exhaust pipe 200 and is close to the temperature measurement point position, the third sealing sleeve 10 of the temperature measurement system may be sealed on the pipe wall of the exhaust pipe 200, and the armored wire 5 of the temperature measurement system and the wire of the second thermocouple 7 are both sealed through the third sealing sleeve 10 and connected with the terminal equipment.
A gas temperature measurement method for a gas turbine according to an embodiment of the present invention is described below.
The gas temperature measurement method for the gas turbine according to the embodiment of the invention comprises the following steps:
S1: the probe of the first thermocouple 6 is mounted at the temperature measurement point location. Specifically, the temperature measuring point can be selected on the inner wall of the high-temperature container, and the probe of the first thermocouple 6 is fixed at the selected temperature measuring point.
S2: the seal box 1 is mounted at a position close to the temperature measurement point.
Specifically, the sealing box 1 may be fixed to the inner wall of the high-temperature container by a bolt, a screw, or welding. The seal box 1 should be provided at a position closer to the temperature measurement point.
S3: the thermoelectric voltage V1 is obtained by the first thermocouple 6 and the sheathed wire 5, and the thermoelectric voltage V2 is obtained by the second thermocouple 7.
Specifically, the armoured wire 5 and the second thermocouple 7 are both penetrated out of the high-temperature container and connected with the terminal equipment, the thermoelectric voltage V1 between the temperature measuring point and the inner joint 4 of the sealing box 1 can be obtained through the armoured wire 5 and the first thermocouple 6, and the thermoelectric voltage V2 between the inner joint 4 of the sealing box 1 and the terminal equipment can be obtained through the second thermocouple 7.
S4: the thermoelectric voltage V1 and the thermoelectric voltage V2 are summed and the total thermoelectric voltage V3 is obtained.
Specifically, a corresponding program may be introduced into the terminal device, whereby the terminal device may sum the thermoelectric voltage V1 and the thermoelectric voltage V2 by itself and obtain the total thermoelectric voltage V3.
S5: the total thermal potential V3 is converted and the temperature of the temperature measuring point is obtained.
Specifically, the total thermal potential V3 may be compared with a thermocouple graduation table, so as to obtain a temperature value corresponding to the total thermal potential V3, where the temperature value is a temperature value of the selected temperature measurement point.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (6)
1. A gas temperature measurement system for a gas turbine, comprising:
a seal box adapted to be disposed within the measurement volume;
the heat insulation piece is arranged in the sealing box;
A temperature reference member provided on the heat insulating member to insulate heat between the heat insulating member and the sealing case;
The connector is arranged on the temperature reference piece, heat can be conducted between the connector and the temperature reference piece, and the connector is a wire connector or an electric connector;
the inner end of the armored wire is connected with the connector, the outer end of the armored wire penetrates out of the sealing box, and the armored wire is sealed with the box wall of the sealing box;
A first thermocouple for mounting at a temperature measurement point location within the measurement volume, a wire of the first thermocouple sealingly passing through a box wall of the seal box to connect with the junction, the first thermocouple for measuring a thermoelectric voltage V1 between the temperature measurement point and the junction;
a second thermocouple mounted on the temperature reference member and used for measuring the temperature of the temperature reference member, wherein a wire of the second thermocouple penetrates out of the sealing box and is sealed with a box wall of the sealing box, and the second thermocouple is used for measuring a thermoelectric voltage V2 between the temperature reference member and a terminal device;
the sealing box comprises a box body and a box cover, the heat insulation piece, the temperature reference piece and the joint are all arranged in the box body, one side of the box body is open, and the box cover is detachably and hermetically arranged at the open position of the box body;
One of the end face of the opening of the box body and the box cover is provided with an annular groove, the other is provided with an annular flange, and the annular flange is matched in the annular groove;
The first thermocouple, the connector and the armored wire are sequentially connected in series along the up-down direction;
The connector comprises a first connector and a second connector, the first connector is connected with the second connector, the inner end of the armored wire is connected with the first connector, and the wire of the first thermocouple is connected with the second connector;
The first connector and the second connector are both fixed on the temperature reference piece, and the first connector and the second connector are sequentially arranged along the up-down direction, wherein the first connector is positioned above the second connector, the armored wire is arranged above the first connector and is electrically connected with the first connector, the first thermocouple is arranged below the second connector and is electrically connected with the second connector, and the first connector and the second connector are electrically connected in a plug-in fit mode;
A first hole and a second hole are formed in the box wall of the sealing box, a first sealing cutting sleeve is matched in the first hole, the armored wire passes through the first sealing cutting sleeve in a sealing mode, a second sealing cutting sleeve is matched in the second hole, and the wire of the first thermocouple passes through the first sealing cutting sleeve in a sealing mode;
The armoured wires are multiple;
The third sealing cutting ferrule is located the box body outside, a plurality of armoured wires all seal and pass the third sealing cutting ferrule.
2. The gas temperature measurement system for a gas turbine of claim 1, wherein the temperature reference and the sheathed wire are both copper.
3. The gas temperature measurement system for a gas turbine of claim 1, wherein said plurality of joints are each mounted on said temperature reference member, a plurality of said sheathed wires are connected to a plurality of said joints in a one-to-one correspondence, and said first thermocouple is connected to a plurality of said joints in a one-to-one correspondence.
4. A gas temperature measurement system for a gas turbine according to claim 3, wherein a plurality of said first thermocouples are divided into a plurality of groups, each group including at least one said first thermocouple, said first thermocouples of each group being for monitoring the same temperature site location.
5. A gas turbine comprising an exhaust pipe and a temperature measurement system mounted at an outlet position of the exhaust pipe, the temperature measurement system being the gas temperature measurement system for a gas turbine according to any one of claims 1 to 4.
6. A gas temperature measurement method based on the gas temperature measurement system according to any one of claims 1 to 4, characterized by comprising the steps of:
installing a probe of a first thermocouple at the position of the temperature measuring point;
installing the sealing box at a position close to the temperature measuring point;
obtaining a thermoelectric voltage V1 through a first thermocouple and an armored wire, and obtaining a thermoelectric voltage V2 through a second thermocouple;
Summing the thermoelectric voltage V1 and the thermoelectric voltage V2 and obtaining a total thermoelectric voltage V3;
The total thermal potential V3 is converted and the temperature of the temperature measuring point is obtained.
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