CN113267265A - Gas turbine gas temperature measurement system, gas turbine, and temperature measurement method - Google Patents
Gas turbine gas temperature measurement system, gas turbine, and temperature measurement method Download PDFInfo
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- CN113267265A CN113267265A CN202110556198.1A CN202110556198A CN113267265A CN 113267265 A CN113267265 A CN 113267265A CN 202110556198 A CN202110556198 A CN 202110556198A CN 113267265 A CN113267265 A CN 113267265A
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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 measuring system of a gas turbine, the gas turbine and a temperature measuring method, which comprise a sealing box, a heat insulation piece and a temperature reference piece, the temperature measuring device comprises a connector, an armored wire, a first thermocouple and a second thermocouple, wherein the sealing box is suitable for being arranged in a measuring containing cavity, a heat insulation piece is arranged in the sealing box, a temperature reference piece is arranged on the heat insulation piece, the connector is arranged on the temperature reference piece, heat can be conducted between the connector 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, the armored wire is sealed with 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 mode to be connected with the connector, the second thermocouple is arranged on the temperature reference piece and is used for measuring the temperature of the temperature reference piece, and the wire of the second thermocouple penetrates out of the sealing box and is sealed with the box wall of the sealing box. The gas temperature measuring system can avoid the influence of higher measuring environment temperature, and has high temperature measuring precision and low cost.
Description
Technical Field
The invention relates to the technical field of gas turbines, in particular to a gas temperature measuring system of a gas turbine and a gas turbine with the same.
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 for temperature measurement, and the first thermocouple is high in cost because the first thermocouple contains precious metals such as platinum, rhodium and the like. In order to reduce the length of the first thermocouple to reduce the cost, the related art also adopts a mode of connecting the first thermocouple with a compensation lead (a cheap metal lead), but the compensation lead can only be used within a certain environmental temperature, when the environmental temperature is higher, the error of the compensation lead is larger, and the accuracy of temperature measurement is lower.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the invention provides a gas temperature measuring system for a gas turbine, which can avoid the influence of high measured ambient temperature, has high temperature measuring precision and is low in cost.
The embodiment of the invention also provides a gas turbine applying the gas temperature measuring system for the gas turbine.
The embodiment of the invention also provides a gas temperature measuring method of the gas turbine, which applies the gas temperature measuring system for the gas turbine.
The gas temperature measuring system for the gas turbine according to the embodiment of the invention comprises a sealing box, a gas inlet pipe and a gas outlet pipe, wherein the sealing box is suitable for being arranged in a measuring cavity; 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 box; the joint is arranged on the temperature reference part, and heat can be conducted between the joint and the temperature reference part; 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 and the box wall of the sealing box are sealed; the first thermocouple is used for being installed at the position of a temperature measuring point in the measuring cavity, and a lead of the first thermocouple hermetically penetrates through the box wall of the sealing box to be connected with the joint; and the second thermocouple is arranged on the temperature reference part and is used for measuring the temperature of the temperature reference part, and a lead 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 measuring system for the gas turbine, the influence of high measurement environment temperature can be avoided, the temperature measuring accuracy is high, and the cost is low.
In some embodiments, the sealing box comprises a box body and a box cover, the heat insulation part, the temperature reference part 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, an annular groove is provided on one of the open end surface of the case body and the case cover, and an annular flange is provided on the other, the annular flange fitting within the annular groove.
In some embodiments, the temperature reference member and the sheathed wire are both made of copper.
In some embodiments, the connector includes a first connector and a second connector, the first connector and the second connector being connected, the inner end of the armor wire being connected to the first connector, and the wire of the first thermocouple being connected to the second connector.
In some embodiments, the sealing box has a first hole and a second hole on the box wall, the first hole is fitted with a first sealing sleeve, the armored lead seal passes through the first sealing sleeve, the second hole is fitted with a second sealing sleeve, and the lead seal of the first thermocouple passes through the first sealing sleeve.
In some embodiments, the connector includes a plurality of connectors, a plurality of the connectors are mounted on the temperature reference member, the sheathed wire includes a plurality of the sheathed wires, the sheathed wires are connected to the connectors in a one-to-one correspondence, the first thermocouples include a plurality of the thermocouples, and the first thermocouples are connected to the connectors in a one-to-one correspondence.
In some embodiments, the plurality of first thermocouples are divided into a plurality of groups, each group comprises at least one first thermocouple, and the first thermocouples of each group are used for monitoring the same temperature measuring point position.
In some embodiments, the gas temperature measurement system further comprises a third sealing ferrule located outside the enclosure, the plurality of armored wires each sealingly passing through the third sealing ferrule.
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 described in any one of the embodiments.
The gas temperature measuring method for the gas turbine according to the embodiment of the invention comprises the following steps: installing a probe of a first thermocouple at a temperature measuring point position; installing a sealing box at a position close to the temperature measuring point; obtaining a thermoelectric potential V1 through a first thermocouple and an armored wire, and obtaining a thermoelectric potential V2 through a second thermocouple; summing the thermoelectric potential V1 and the thermoelectric potential V2 and obtaining a total thermoelectric potential V3; the temperature at the temperature measurement point is obtained by converting the total thermal potential V3.
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 present invention.
FIG. 2 is a schematic diagram of the internal structure of a case 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 box for a gas temperature measurement system of a gas turbine according to an embodiment of the present invention.
FIG. 4 is a schematic illustration 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 box cover 12;
a heat insulator 2;
a temperature reference member 3;
a joint 4; a first joint 41; a second joint 42;
an armored wire 5;
a first thermocouple 6;
a second thermocouple 7;
a first sealing ferrule 8;
a second sealing ferrule 9;
a third sealing ferrule 10;
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 with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to 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 simply as gas temperature measurement system 100) according to an embodiment of the present invention includes a seal box 1, a heat insulating member 2, a temperature reference member 3, a junction 4, an armored wire 5, a first thermocouple 6, and a second thermocouple 7.
The capsule 1 is adapted to be arranged in a measurement volume. Specifically, an inner cavity is arranged in the seal box 1, and the inner cavity of the seal box 1 is relatively sealed. The seal box 1 is used for being installed in a measurement cavity with a temperature to be measured, the measurement cavity can be a high temperature cavity, the high temperature cavity can be a cavity with a temperature higher than 100 ℃, and the measurement cavity can be a cavity of an exhaust pipe 200 of a gas turbine.
The heat insulator 2 is provided inside the sealed box 1. Specifically, as shown in fig. 1, the heat insulating member 2 may be a heat insulating plate or a heat insulating gasket, the heat insulating member 2 is fixed in the sealed inner cavity, and the heat insulating member 2 has a good heat insulating effect.
The temperature reference member 3 is provided on the heat insulating member 2 to insulate heat between the heat insulating member 2 and the sealed box 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 sealed box 1, whereby both the attachment and fixation of the temperature reference member 3 in the sealed box 1 and the heat insulation between the temperature reference member 3 and the sealed box 1 are achieved.
The joint 4 is provided on the temperature reference member 3, and heat is conducted between the joint 4 and the temperature reference member 3. Specifically, as shown in fig. 3, the terminal 4 may be a wire terminal 4 or an electrical connector, the terminal 4 is mounted on the temperature reference member 3, and the terminal 4 is not in contact with the inner wall of the sealed case 1, and there is a good thermal conduction between the terminal 4 and the temperature reference member 3, whereby the temperatures of the terminal 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 inside 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 armored wire 5 is connected with the box wall in a sealing way by penetrating through the part of the box wall of the sealing box 1, thereby ensuring the sealing performance of the sealing box 1.
It should be noted that the thermoelectric force generated by the armored wire 5 at high temperature can be ignored, 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 arranged at the position of a temperature measuring point in the measuring cavity, and the lead of the first thermocouple 6 penetrates through the box wall of the sealing box 1 in a sealing mode to be connected with the joint 4. Specifically, as shown in fig. 1, the first thermocouple 6 comprises a probe and a lead wire, the probe of the first thermocouple 6 is located at the outer side of the sealed box 1, the probe of the first thermocouple 6 is used for being installed at the position of a temperature measuring point of the measurement cavity, and the lead wire of the first thermocouple 6 penetrates through the box wall of the sealed box 1 in a sealed mode and is electrically connected with the joint 4. Thus, as shown in fig. 2, the first thermocouple 6, the joint 4, and the sheathed wire 5 are connected in series in the vertical direction, and the thermoelectric voltage V1 between the temperature measurement point and the joint 4 can be measured via the first thermocouple 6. It should be noted that, in order to reduce the measurement error, the first thermocouple 6 should be a high-temperature thermocouple, for example, the first thermocouple 6 may be an R-type, B-type, S-type thermocouple, etc.
The second thermocouple 7 is arranged on the temperature reference part 3 and is used for measuring the temperature of the temperature reference part 3, and the lead of the second thermocouple 7 penetrates out of the sealing box 1 and is sealed with the box wall of the sealing box 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 used for electrical connection with a terminal device. Thereby, the thermoelectric voltage V2 between the temperature reference piece 3 and the terminal device can be measured via the second thermocouple 7. In order to reduce the cost, the second thermocouple 7 may be an inexpensive metal thermocouple, and for example, the second thermocouple 7 may be a K-type thermocouple, an N-type thermocouple, or the like.
It should be noted that there may be more than one second thermocouple 7, when there is one second thermocouple 7, the value measured by the second thermocouple 7 is the thermoelectric potential between the temperature reference member 3 and the terminal device, and when there are a plurality of second thermocouples 7, the values measured by the plurality of second thermocouples 7 may be averaged, and the average value is the thermoelectric potential between the temperature reference member 3 and the terminal device.
According to the gas temperature measuring system 100 for the gas turbine of the embodiment of the invention, when in use, the probe of the first thermocouple 6 is installed at the position of the temperature measuring point with temperature measurement, the seal box 1 of the gas temperature measuring system 100 is installed at the position close to the temperature measuring point, the sheathed lead 5 and the lead of the second thermocouple 7 are electrically connected with the terminal equipment, the thermoelectric potential V1 is measured through the first thermocouple 6, the thermoelectric potential V2 is measured through the second thermocouple 7, and the temperature value of the temperature measuring point can be obtained by summing and converting the thermoelectric potential V1 and the thermoelectric potential V2.
Because the thermoelectrical potential generated by the armored lead 5 can be ignored, the condition that the gas temperature measuring system 100 is influenced by the temperature to generate large errors is avoided, and the measuring precision is ensured. Owing to be provided with seal box 1, the wire of first thermocouple 6 only need be connected to seal box 1 department can, avoided among the correlation technique need pull out measuring vessel with the wire of first thermocouple 6 and cause the longer condition of first thermocouple 6 size, reduced the consumptive material of first thermocouple 6, and then reduced gas temperature measurement system 100's overall cost.
In addition, the connection positions of the armored wire 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 part 3 are all arranged in the sealing box 1, the sealing box 1 has a protection effect, the sealing box can be used in an environment with the temperature of 800 ℃, and can bear the pressure of 3 MPa, so that the condition that all the connection positions are damaged by pressure is avoided, the stable operation of the measuring system is ensured, the modularization and the integration of the measuring system are also improved, and the installation and the disassembly are facilitated.
In some embodiments, the sealing box 1 includes a box body 11 and a box cover 12, the heat insulation element 2, the temperature reference element 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 box 1 includes a box body 11 and a box cover 12, the box body 11 is a square box, the box cover 12 is a rectangular plate, and the box cover 12 is detachably installed at an open position of the box body 11, for example, the box cover 12 may be fixedly connected to the box body 11 by bolts and nuts. The arrangement of the box body 11 and the box cover 12 facilitates the installation, the disassembly and the maintenance of the heat insulation piece 2, the temperature reference piece 3 and the joint 4.
The heat insulator 2 and the temperature reference member 3 may be both rectangular plate-shaped, and the heat insulator 2 is provided in the case 11 and fixed to the inner bottom of the case 11, for example, the heat insulator 2 may be detachably connected to the bottom of the case 11 by a bolt or a screw. The temperature reference element 3 is arranged on the side of the heat insulation element 2 facing away from the box bottom, and the temperature reference element 3 can also be detachably connected to the heat insulation element 2 by means of screws or bolts.
The joint 4 is in a cuboid shape, the joint 4 is arranged on the side surface of the temperature reference component 3, which faces away from the heat insulation component 2, and the joint 4 can be detachably connected with the temperature reference component 3 through a bolt or a screw.
Preferably, box body 11 and lid pass through bolted connection fixed, and the bolt has a plurality ofly, and a plurality of bolts all establish at the open periphery side of box body 11 and along the open circumference interval arrangement of box body 11. The sealing balance and the sealing effect are ensured.
In some embodiments, one of the open end surface of the case body 11 and the case cover 12 is provided with an annular groove 111, and the other is provided with an annular flange (not shown) which is fitted in the annular groove 111. As shown in fig. 3, the annular groove 111 is disposed on the box body 11, specifically on the end surface of the box body 11 where the opening is located, the annular groove 111 is a closed ring groove, and the annular groove 111 surrounds the outer periphery of the opening. The annular flange is arranged on the box cover 12 and is a closed circle of bulge, the cross section shape of the annular flange is matched with that of the annular groove 111, and when the box cover 12 is buckled on the box body 11, the annular flange can be matched in the annular groove 111. The annular groove 111 and the annular flange are arranged to have a labyrinth effect, so that the sealing performance of the box cover 12 and the box body 11 is enhanced, and the positioning effect is achieved, so that the assembly accuracy of the box body 11 and the box cover 12 is guaranteed.
In some embodiments, the temperature reference member 3 and the sheathed wire 5 are both made of copper. Copper has better heat conductivity on the one hand to guaranteed the heat conduction between temperature reference 3 and the joint 4, the thermoelectric force that on the other hand copper produced under high temperature environment is less, can ignore, thereby has guaranteed temperature measurement's precision.
In some embodiments, the connector 4 includes a first connector 41 and a second connector 42, the first connector 41 and the second connector 42 are connected, the inner end of the armor wire 5 is connected to the first connector 41, and the wire of the first thermocouple 6 is connected to the second connector 42. Specifically, as shown in fig. 2, the connector 4 includes a first connector 41 and a second connector 42, the first connector 41 and the second connector 42 are both fixed on the temperature reference member 3, and the first connector 41 and the second connector 42 are sequentially arranged along the up-down direction, wherein the first connector 41 is located above the second connector 42, the sheathed wire 5 is arranged above the connector 4 and electrically connected to the first connector 41, and the first thermocouple 6 is arranged below the connector 4 and electrically connected to the second connector 42. The first connector 41 and the second connector 42 can be electrically connected by means of a plug-in fit.
In some embodiments, the sealing box 1 has a first hole and a second hole on the box wall, the first hole is fitted with a first sealing sleeve 8, the armored wire 5 is sealed to pass through the first sealing sleeve 8, the second hole is fitted with a second sealing sleeve 9, and the wire of the first thermocouple 6 is sealed to pass through the first sealing sleeve 8.
As shown in fig. 1 and 2, the first hole is formed in the side wall of the upper portion of the sealing box 1, the second hole is formed in the side wall of the lower portion of the sealing box 1, the first hole is internally provided with a first sealing cutting sleeve 8, the second hole is internally provided with a second sealing cutting sleeve 9, and the first sealing cutting sleeve 8 and the second sealing cutting sleeve 9 can be both bolt sealing cutting sleeves. The periphery side of the first sealing cutting sleeve 8 is connected with the hole wall of the first hole in a sealing mode, the armored wire 5 is arranged in the first sealing cutting sleeve 8 in a sealing mode in a penetrating mode, the periphery side of the second sealing cutting sleeve 9 is connected with the hole wall of the second hole in a sealing mode, and the wire of the first thermocouple 6 penetrates through the second sealing cutting sleeve 9 in a sealing mode. The arrangement of the first sealing cutting sleeve 8 and the second sealing cutting sleeve 9 ensures the sealing performance of the sealing box 1.
In some embodiments, the plurality of joints 4 are provided, the plurality of joints 4 are each mounted on the temperature reference member 3, the plurality of sheathed wires 5 are provided, the plurality of sheathed wires 5 are connected to the plurality of joints 4 in a one-to-one correspondence, the plurality of first thermocouples 6 are provided, and the 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 arranged in order in the left-right direction. The armored wires 5 and the first thermocouples 6 are also provided with a plurality of wires, the armored wires 5 are electrically connected with the upper ends of the connectors 4 in a one-to-one correspondence mode, and the wires of the first thermocouples 6 are electrically connected with the lower ends of the connectors 4 in a one-to-one correspondence mode. Therefore, the measurement values of the first thermocouples 6 can be obtained, so that errors caused by the first thermocouples 6 in a small number are avoided, and the measurement accuracy is guaranteed.
In some embodiments, the plurality of first thermocouples 6 is 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 measurement point 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 monitoring the temperature of the same temperature measurement point position, thereby further ensuring the measurement accuracy of the same temperature measurement point position. In addition, the first thermocouples 6 are divided into a plurality of groups, and can be used for monitoring the temperature of different temperature measuring points simultaneously, 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 sleeve 10, the third sealing sleeve 10 is located outside the box body 11, and each of the plurality of armored wires 5 passes through the third sealing sleeve 10 in a sealing manner. Specifically, as shown in fig. 1 and fig. 2, the third sealing cutting sleeve 10 is used for being connected with the container wall of the measuring container in a sealing manner, and the plurality of armored wires 5 are all arranged in the third sealing cutting sleeve 10 in a sealing manner, so that on one hand, the sealing performance of the measuring container can be ensured, on the other hand, the collection and arrangement of the plurality of armored wires 5 are also realized, and the arrangement of the armored wires 5 is simplified.
It is understood that in some embodiments, the lead of the second thermocouple 7 may also be sealingly disposed through the third sealing ferrule 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 the temperature measurement system installed at the exit position of the exhaust pipe 200, and the temperature measurement system may be the gas temperature measurement system 100 for the gas turbine described in the above embodiment.
Specifically, as shown in fig. 4, a probe of a first thermocouple 6 of the temperature measurement system may be installed at a temperature measurement point position of the exhaust pipe 200, a sealing box 1 of the temperature measurement system is installed in the exhaust pipe 200 and close to the temperature measurement point position, a third sealing ferrule 10 of the temperature measurement system may be hermetically arranged on a pipe wall of the exhaust pipe 200, and both an armored wire 5 of the temperature measurement system and a wire of a second thermocouple 7 of the temperature measurement system hermetically penetrate through the third sealing ferrule 10 and are connected with the terminal device.
A gas temperature measuring method for a gas turbine according to an embodiment of the present invention is described below.
The gas temperature measuring 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 sealed box 1 is installed at a position near the temperature measuring point.
Specifically, the sealing box 1 may be fixed on the inner wall of the high-temperature container by bolts, screws, or welding. The sealed box 1 should be arranged at a position closer to the temperature measuring point.
S3: thermoelectric potential V1 is obtained by first thermocouple 6 and sheathed wire 5, and thermoelectric potential V2 is obtained by second thermocouple 7.
Specifically, the sheathed wire 5 and the second thermocouple 7 both penetrate out of the high-temperature container and are connected with the terminal equipment, the thermoelectric potential V1 between the temperature measuring point and the joint 4 in the sealing box 1 can be obtained through the sheathed wire 5 and the first thermocouple 6, and the thermoelectric potential V2 between the joint 4 in the sealing box 1 and the terminal equipment can be obtained through the second thermocouple 7.
S4: the thermoelectric potential V1 and the thermoelectric potential V2 are summed, and the total thermoelectric potential V3 is obtained.
In particular, a corresponding program can be introduced into the terminal device, so that the terminal device can sum the thermoelectric voltage V1 and the thermoelectric voltage V2 by itself and obtain the total thermoelectric voltage V3.
S5: the temperature at the temperature measurement point is obtained by converting the total thermal potential V3.
Specifically, the total thermal potential V3 may be compared with the high-temperature 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 is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (11)
1. A gas temperature measurement system for a gas turbine, comprising:
a sealing 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 box;
the joint is arranged on the temperature reference part, and heat can be conducted between the joint and the temperature reference part;
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 and the box wall of the sealing box are sealed;
the first thermocouple is used for being installed at the position of a temperature measuring point in the measuring cavity, and a lead of the first thermocouple hermetically penetrates through the box wall of the sealing box to be connected with the joint;
and the second thermocouple is arranged on the temperature reference part and is used for measuring the temperature of the temperature reference part, and a lead of the second thermocouple penetrates out of the sealing box and is sealed with the box wall of the sealing box.
2. The gas temperature measurement system for a gas turbine according to claim 1, wherein the sealing case includes a case body and a case cover, the heat insulating member, the temperature reference member, and the joint are provided in the case body, one side of the case body is open, and the case cover is detachably and sealingly installed at an open position of the case body.
3. The gas temperature measurement system for a gas turbine according to claim 2, wherein an annular groove is provided on one of the open end surface of the case body and the case cover, and an annular flange is provided on the other, the annular flange being fitted in the annular groove.
4. The gas temperature measurement system for a gas turbine according to claim 1, wherein the temperature reference member and the sheathed wire are both made of copper.
5. The gas temperature measurement system for a gas turbine according to claim 1, wherein the joint includes a first joint and a second joint, the first joint and the second joint being connected, an inner end of the sheathing wire being connected to the first joint, and a wire of the first thermocouple being connected to the second joint.
6. The gas temperature measurement system for a gas turbine according to claim 1, wherein a first hole and a second hole are provided on a box wall of the seal box, a first seal ferrule is fitted in the first hole, the armored wire seal passes through the first seal ferrule, a second seal ferrule is fitted in the second hole, and a wire seal of the first thermocouple passes through the first seal ferrule.
7. The gas temperature measuring system for a gas turbine according to claim 1, wherein said joint is plural, a plurality of said joints are each mounted on said temperature reference member, said sheathed wire is plural, a plurality of said sheathed wires are connected to a plurality of said joints in one-to-one correspondence, said first thermocouple is plural, and a plurality of said first thermocouples are connected to a plurality of said joints in one-to-one correspondence.
8. The gas temperature measurement system for a gas turbine according to claim 7, 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 used for monitoring the same temperature measurement point location.
9. The gas temperature measurement system for a gas turbine engine of claim 7, further comprising a third sealing ferrule located outside of the case, the plurality of armored wires each sealingly passing through the third sealing ferrule.
10. A gas turbine engine characterized by comprising an exhaust pipe and a temperature measuring system installed at an outlet position of the exhaust pipe, the temperature measuring system being the gas temperature measuring system for a gas turbine engine according to any one of claims 1 to 9.
11. A gas temperature measuring method based on the gas temperature measuring system according to any one of claims 1 to 10, characterized by comprising the steps of:
installing a probe of a first thermocouple at a temperature measuring point position;
installing a sealing box at a position close to the temperature measuring point;
obtaining a thermoelectric potential V1 through a first thermocouple and an armored wire, and obtaining a thermoelectric potential V2 through a second thermocouple;
summing the thermoelectric potential V1 and the thermoelectric potential V2 and obtaining a total thermoelectric potential V3;
the temperature at the temperature measurement point is obtained by converting the total thermal potential V3.
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| CN202110556198.1A CN113267265A (en) | 2021-05-21 | 2021-05-21 | Gas turbine gas temperature measurement system, gas turbine, and temperature measurement method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113702059A (en) * | 2021-09-17 | 2021-11-26 | 中国联合重型燃气轮机技术有限公司 | Lubricating oil filter for gas turbine |
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