Compressor test piece outlet temperature sensing part calibration device and calibration method

Abstract

The invention provides a calibration device and a calibration method for an outlet temperature sensing part of a gas compressor test piece, and the calibration device comprises a frame body structure which is a hollow frame body, and the upper end surface of the frame body structure is provided with a sensing part installation hole; one end part of the calibration assembly body component is fixed on the inner wall surface of the bottom of the frame body structure, the other end part is inserted into the lower end part of the furnace body to control the temperature in the furnace body, and the upper end part of the furnace body is inserted into the sensing part mounting hole; the temperature equalizing block is inserted into the upper end part of the furnace body; the calibrated temperature sensing part penetrates through the sensing part mounting hole and is inserted into the temperature equalizing block; and the test control device is mounted on the frame structure, is connected with the calibration assembly component and is used for controlling the temperature in the furnace body. According to the invention, through arrangement of each structure, rapid detection and calibration of the multi-point temperature sensing part can be realized, measurement reliability and temperature measurement accuracy of the sensing part in a use process can be effectively evaluated, and data support is further provided for correction of a measurement result of the temperature sensing part.

Description

Technical Field

[0001] The invention relates to the field of compressor test piece calibration, and in particular to a compressor test piece outlet temperature sensing part calibration device and a calibration method. Background Art

[0002] In the prior art, the compressor is one of the three key components of civil aviation engines, and its performance evaluation is extremely critical, and the temperature rise efficiency is an important indicator for evaluating the performance of the compressor. The evaluation of the temperature rise efficiency requires the temperature parameters of the compressor inlet and outlet sections as input. Therefore, it is particularly important to accurately measure the temperature of the compressor inlet and outlet sections.

[0003] At present, the compressor outlet temperature is measured by a temperature sensing part, which is usually composed of 4 or more thermocouples integrated in the sensing part shell to form a comb-like structure. As a key test component for temperature parameter measurement, it is important to ensure the measurement accuracy and reliability of the temperature sensing part.

[0004] In addition, the temperature sensing part will be statically calibrated for the thermocouple wire before assembly, and the temperature recovery coefficient of the sensing part will be calibrated after assembly. After the factory acceptance, the temperature measurement error of the sensing part will no longer be calibrated during subsequent use, resulting in the inability to guarantee the accuracy and reliability of the temperature parameter measurement data of the sensing part during use.

[0005] Therefore, it is urgent to explore the static calibration detection method of the sensing part to effectively ensure the accuracy of temperature measurement during the use of the sensing part.

[0006] The inventor of the present application has designed a compressor test piece outlet temperature sensing part calibration device and calibration method in order to overcome the above-mentioned technical problems. Summary of the invention

[0007] The technical problem to be solved by the present invention is to overcome the defect in the prior art that the compressor outlet temperature is calibrated by a sensing part and the accuracy and reliability of parameter measurement data cannot be guaranteed, and a compressor test piece outlet temperature sensing part calibration device and calibration method are provided.

[0008] The present invention solves the above technical problems through the following technical solutions:

[0009] A compressor test piece outlet temperature sensing part calibration device, wherein the compressor test piece outlet temperature sensing part calibration device comprises:

[0010] The frame structure is a hollow frame, and a sensing part mounting hole is arranged on the upper end surface of the frame structure;

[0011] A calibration assembly component, one end of which is fixed to the bottom inner wall surface of the frame structure, and the other end is inserted into the lower end of the furnace body to control the temperature inside the furnace body, and the upper end of the furnace body is inserted into the sensing part mounting hole;

[0012] A temperature-equalizing block and a calibrated temperature sensing part, wherein the temperature-equalizing block is inserted into the upper end of the furnace body, and the calibrated temperature sensing part is inserted into the temperature-equalizing block through the sensing part mounting hole;

[0013] A test control device, which is mounted on the frame structure and connected to the calibration assembly component, and is used to control the temperature in the furnace;

[0014] When the temperature in the furnace body and the temperature-equalizing block reaches the target temperature value, the test control device controls the calibration assembly component so that the temperature environment inside the furnace body is uniform and constant.

[0015] According to one embodiment of the present invention, the frame structure includes an upper panel, a lower bottom plate, a left side plate and a right side plate, and the upper panel, the lower bottom plate, the left side plate and the right side plate are interconnected to form a hollow frame, and the sensing part mounting hole is arranged on the upper panel.

[0016] According to one embodiment of the present invention, the calibration assembly component includes multiple lead screws, a support plate, at least one heating rod and at least one temperature-controlled thermocouple, the lower end of the lead screw passes through the support plate and is connected and fixed to the lower base plate, one end of the heating rod and one end of the temperature-controlled thermocouple are both installed on the support plate, the other end of the heating rod and the other end of the temperature-controlled thermocouple are inserted into the furnace body, and the lower end of the furnace body is arranged on the upper end surface of the support plate.

[0017] According to an embodiment of the present invention, a first blind hole is provided near the edge of the lower end of the furnace body, and the other end of the temperature-controlling thermocouple is inserted into the first blind hole to control the temperature inside the furnace body.

[0018] According to one embodiment of the present invention, the calibration assembly component further includes a heat dissipation fan, which is installed on the lower base plate and is located below the support plate.

[0019] According to one embodiment of the present invention, the test control device includes a temperature control meter, a relay and a control circuit, the temperature control meter is installed on the upper panel and is used to calibrate the temperature setting; the relay is installed on the lower base plate, and the control circuit connects the temperature control meter and the relay.

[0020] According to an embodiment of the present invention, the temperature-controlling thermocouple is an S-type thermocouple, and a side head of the temperature-controlling thermocouple is installed at a fixed position in the first blind hole.

[0021] According to one embodiment of the present invention, the side head of the temperature-controlling thermocouple is located 12 mm away from the upper end of the furnace body.

[0022] According to an embodiment of the present invention, a second blind hole is formed on the upper end surface of the temperature-averaging block, and the calibrated temperature sensing part is inserted into the second blind hole.

[0023] According to an embodiment of the present invention, the temperature equalizing block is made of copper-based alloy material.

[0024] According to one embodiment of the present invention, at least one stripe hole is provided on the upper panel, at least one stripe hole is provided on the left panel and the right panel respectively, and an arc-shaped hole is provided on the lower bottom plate to enhance the heat dissipation of the outer frame.

[0025] The present invention also provides a method for calibrating a temperature sensing portion of a compressor test piece outlet, wherein the calibration method adopts the compressor test piece outlet temperature sensing portion calibration device as described above, and the calibration method comprises the following steps:

[0026] S1. Place the temperature-averaging block of the calibration device in the furnace, place the calibration device on a horizontal fixed surface, and turn on the power supply;

[0027] S2, vertically placing the calibrated thermocouple in the cavity of the furnace body so that the bottom of the temperature sensing part mounting seat is in contact with the upper end surface of the furnace body;

[0028] S3, connecting each channel of the calibrated temperature sensing part to the temperature data acquisition system;

[0029] S4. Start the test control device to electrically heat the high-temperature heating rod, increase the temperature of the furnace body cavity and the temperature equalizing block cavity where the calibrated sensing part is placed, and feed back the temperature signal to the test control device; when the temperature reaches the target temperature value, the test control device will control the heating rate of the heating rod to make the inside of the furnace body a uniform and constant temperature environment.

[0030] According to an embodiment of the present invention, the step S4 further comprises: clicking a start button, the control panel displays the current furnace temperature value, and setting the target temperature value in the control panel;

[0031] After the settings are completed, the test controller issues a command and the heating rod starts to heat the inside of the furnace cavity;

[0032] The temperature sensing part to be calibrated performs temperature sensing, and after the control panel displays that the furnace temperature has reached the target setting value;

[0033] After waiting for a while, the temperature data acquisition system is used to read the temperature value of each channel of the sensing part respectively, and the read temperature value is compared with the target temperature value to evaluate whether the temperature sensing part is working normally and the temperature measurement accuracy of each measuring point.

[0034] According to an embodiment of the present invention, the gap at the furnace mouth of the furnace body in step S2 is blocked with high-temperature asbestos.

[0035] The positive and progressive effects of the present invention are:

[0036] The compressor test piece outlet temperature sensing part calibration device and calibration method of the present invention have the following advantages:

[0037] 1. The calibration device can realize rapid detection and calibration of multi-point temperature sensing parts through the settings of various structures, can effectively evaluate the measurement reliability and temperature measurement accuracy of the sensing parts during use, and further provide data support for the correction of the measurement results of the temperature sensing parts.

[0038] Second, the calibration device does not need to be limited to the laboratory, and can further provide rapid response services at the test site.

[0039] 3. The calibration device and calibration method can be further expanded to serve the pre-test troubleshooting work of the temperature sensing part used on site, determine the validity and reliability of each measuring point of the temperature sensing part, and ensure that valid temperature measurement data can be obtained during the test process.

[0040] Fourth, further troubleshooting work can be carried out on the temperature sensing part at the test site to determine the fault point and location of the temperature sensing part to support the rapid maintenance of the temperature sensing part. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always represent the same features, wherein:

[0042] Figure 1 The figure is a schematic diagram of the assembly structure of the compressor test piece outlet temperature sensing part calibration device of the present invention.

[0043] Figure 2 It is a stereoscopic diagram of the compressor test piece outlet temperature sensing part calibration device of the present invention. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0045] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to preferred embodiments of the present invention, examples of which are shown in the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings to represent the same or similar parts.

[0046] Furthermore, although the terms used in the present invention are selected from well-known and commonly used terms, some terms mentioned in the present invention specification may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this document.

[0047] Furthermore, it is required that the present invention be understood not only by the actual terms used but also by the meanings connoted by each term.

[0048] Figure 1 The figure is a schematic diagram of the assembly structure of the compressor test piece outlet temperature sensing part calibration device of the present invention. Figure 2 It is a stereoscopic diagram of the compressor test piece outlet temperature sensing part calibration device of the present invention.

[0049] like Figure 1 and Figure 2 As shown, the present invention discloses a calibration device for the outlet temperature sensing part of a compressor test piece, which includes: a frame structure 100, a calibration assembly component, a temperature-averaging block 200, a calibrated sensing part 300 and a test control device. Among them, the frame structure 100 is a hollow frame, and a sensing part mounting hole 110 is arranged on the upper end surface of the frame structure 100. One end of the calibration assembly component is fixed to the bottom inner wall surface of the frame structure 100, and the other end is inserted into the lower end of the furnace body 400 to control the temperature in the furnace body 400, and the upper end of the furnace body 400 is inserted into the sensing part mounting hole 110. The temperature-averaging block 200 is inserted into the upper end of the furnace body 400, and the calibrated temperature sensing part 300 is inserted into the temperature-averaging block 200 through the sensing part mounting hole 110. The test control device is installed on the frame structure 100, connected to the calibration assembly component, and used to control the temperature in the furnace body 400. When the temperature inside the furnace body 400 and the temperature-isolating block 200 reaches the target temperature value, the test control device controls the calibration assembly component to make the inside of the furnace body 400 a uniform and constant temperature environment.

[0050] The frame structure 100 is a basic supporting component of the compressor test piece outlet temperature sensing part calibration device, and is used to install and support other components of the temperature sensing part calibration device. Preferably, the frame structure 100 includes an upper panel 120, a lower bottom plate 130, a left side plate 140 and a right side plate 150. The upper panel 120, the lower bottom plate 130, the left side plate 140 and the right side plate 150 are connected to each other to form a hollow frame, and the sensing part mounting hole 110 is set on the upper panel 120.

[0051] The upper panel 120 may also be provided with left and right handles 121, a power socket 122 and a switch 123. Further, the upper panel 120 may also be provided with stripe holes 160 for enhancing heat dissipation of the outer frame. The left panel 140 and the right panel 150 may also be provided with stripe holes 160 for enhancing heat dissipation of the outer frame. The lower bottom panel 130 may also be provided with an annular hole 131 for enhancing heat dissipation of the outer frame.

[0052] The calibration assembly component is used to provide an accurate temperature field to determine the temperature measurement error of the calibrated temperature sensing part, and to evaluate its measurement accuracy. Preferably, the calibration assembly component includes a plurality of lead screws 500, a support plate 510, at least one heating rod 520 and at least one temperature-controlled thermocouple 530. The lower end of the lead screw 500 passes through the support plate 510 and is connected and fixed to the lower base plate 130, one end of the heating rod 520 and one end of the temperature-controlled thermocouple 530 are both mounted on the support plate 510, and the other end of the heating rod 520 and the other end of the temperature-controlled thermocouple 530 are inserted into the furnace body 400, and the lower end of the furnace body 400 is arranged on the upper end surface of the support plate 510.

[0053] A first blind hole 410 is provided at the lower end of the furnace body 400 near the edge, and the other end of the temperature-controlling thermocouple 530 is inserted into the first blind hole 410 to control the temperature inside the furnace body 400 .

[0054] The calibration assembly component further includes a heat dissipation fan 540 , which is installed on the lower base plate 130 and is located below the support plate 510 .

[0055] Specifically, the lower end surface of the upper panel 120 is threadedly connected to a plurality of lead screws 500 (for example, four lead screws 500), and the lower ends of the lead screws 500 pass through the support plate 510 and the cooling fan 540 and are threadedly connected and fixed to the lower base plate 130. Two heating rods 520 and a temperature-controlling thermocouple 530 are threadedly mounted on the support plate 510, and the upper ends of the two heating rods 520 are inserted into the furnace body 400. The lower end of the furnace body 400 is placed on the upper end surface of the support plate 510, and a first blind hole 410 is provided near the edge of the lower end of the furnace body 400, and the temperature-controlling thermocouple 530 is inserted into the first blind hole 410 to control the temperature inside the furnace body 400.

[0056] The upper end of the furnace body 400 is inserted into a specially shaped equalizing temperature block 200, and the upper end surface of the furnace body 400 is inserted into the sensing part mounting hole (i.e., the insertion port of the calibrated sensing part) 110 of the upper panel 120 and is flush with the upper end of the upper panel 120. The calibrated temperature sensing part 300 can be inserted into the equalizing temperature block 200 through the sensing part mounting hole 110.

[0057] Preferably, the test control device comprises a temperature control meter 600, a relay 610 and a control circuit (not shown). The temperature control meter 600 is mounted on the upper panel 120 for calibrating the temperature setting. The relay 610 is mounted on the lower base plate 130, and the control circuit connects the temperature control meter 600 and the relay 610.

[0058] After the switch 123 is turned on, the temperature control meter 600 electrically heats the high temperature heating rod 520 through the control circuit and the relay 610, thereby increasing the temperature of the inner cavity of the furnace body 400 and the cavity of the temperature-averaging block 200 where the calibrated sensing part 300 is placed, and feeds back the temperature signal to the temperature control meter 600. When the temperature reaches the target temperature value, the temperature control meter 600 controls the heating rate of the heating rod 520 to ensure that a uniform and constant temperature environment is provided inside the furnace body 400.

[0059] Here, the temperature control thermocouple 530 may preferably be an S-type standard thermocouple, and the side head of the temperature control thermocouple 530 is installed at a fixed position in the first blind hole 410. For example, the side head of the temperature control thermocouple 530 is located 12 mm from the upper end of the furnace body 400. By controlling the temperature at this position, the temperature field in the furnace can reach an accuracy of ±2.5‰.

[0060] The temperature-averaging block 200 is preferably made of a copper-based alloy material, which can withstand a high temperature of 1300°C, and a second blind hole (not shown in the figure) is set on the upper end surface of the temperature-averaging block 200 according to the shape of the calibrated temperature sensing part 300. The calibrated temperature sensing part 300 is inserted into the second blind hole to ensure that its inner hole is highly consistent with the calibrated temperature sensing part.

[0061] In addition, the present invention also provides a method for calibrating a temperature sensing portion of a compressor test piece outlet, which uses the compressor test piece outlet temperature sensing portion calibration device as described above, and the calibration method comprises the following steps:

[0062] Step S1, place the temperature equalizing block of the calibration device in the furnace body, place the calibration device on a horizontal fixed surface, and turn on the power supply.

[0063] Step S2, vertically placing the calibrated thermocouple in the cavity of the furnace body so that the bottom of the temperature sensing portion mounting base is in contact with the upper end surface of the furnace body.

[0064] Preferably, in step S2, the gap at the furnace mouth of the furnace body is blocked with high-temperature asbestos.

[0065] Step S3, connecting each channel of the calibrated temperature sensing part to the temperature data acquisition system.

[0066] Step S4, start the test control device to electrically heat the high-temperature heating rod, increase the temperature of the inner cavity of the furnace body and the cavity of the temperature-equalizing block where the calibrated sensing part is placed, and feed back the temperature signal to the test control device; when the temperature reaches the target temperature value, the test control device will control the heating rate of the heating rod to make the inside of the furnace body a uniform and constant temperature environment.

[0067] Preferably, the step S4 further comprises: clicking a start button, the control panel displays the current temperature value in the furnace, and setting the target temperature value in the control panel;

[0068] After the settings are completed, the test controller issues a command and the heating rod starts to heat the inside of the furnace cavity;

[0069] The temperature sensing part to be calibrated performs temperature sensing, and after the control panel displays that the furnace temperature has reached the target setting value;

[0070] After waiting for a while, the temperature data acquisition system is used to read the temperature value of each channel of the sensing part respectively, and the read temperature value is compared with the target temperature value to evaluate whether the temperature sensing part is working normally and the temperature measurement accuracy of each measuring point.

[0071] According to the above description, the compressor test piece outlet temperature sensing part calibration device and calibration method of the present invention can calibrate the temperature measurement deviation of the temperature sensing part, detect whether the temperature sensing part is working normally, and is simple to install, simple to operate, and convenient to calibrate.

[0072] In summary, the compressor test piece outlet temperature sensing part calibration device and calibration method of the present invention have the following advantages:

[0073] 1. The calibration device can realize rapid detection and calibration of multi-point temperature sensing parts through the settings of various structures, can effectively evaluate the measurement reliability and temperature measurement accuracy of the sensing parts during use, and further provide data support for the correction of the measurement results of the temperature sensing parts.

[0074] Second, the calibration device does not need to be limited to the laboratory, and can further provide rapid response services at the test site.

[0075] 3. The calibration device and calibration method can be further expanded to serve the pre-test troubleshooting work of the temperature sensing part used on site, determine the validity and reliability of each measuring point of the temperature sensing part, and ensure that valid temperature measurement data can be obtained during the test process.

[0076] Fourth, further troubleshooting work can be carried out on the temperature sensing part at the test site to determine the fault point and location of the temperature sensing part to support the rapid maintenance of the temperature sensing part.

[0077] For those skilled in the art, the above invention disclosure is only used as an example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary implementation of the present application.

[0078] In the description of this patent, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0079] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0080] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A compressor test piece outlet temperature sensing part calibration device, characterized in that: The compressor test piece outlet temperature sensing part calibration device comprises: The frame structure is a hollow frame, and a sensing part mounting hole is arranged on the upper end surface of the frame structure; A calibration assembly component, one end of which is fixed to the bottom inner wall surface of the frame structure, and the other end is inserted into the lower end of the furnace body to control the temperature inside the furnace body, and the upper end of the furnace body is inserted into the sensing part mounting hole; A temperature-equalizing block and a calibrated temperature sensing part, wherein the temperature-equalizing block is inserted into the upper end of the furnace body, and the calibrated temperature sensing part is inserted into the temperature-equalizing block through the sensing part mounting hole; A test control device, which is mounted on the frame structure and connected to the calibration assembly component, and is used to control the temperature in the furnace; When the temperature in the furnace body and the temperature-equalizing block reaches the target temperature value, the test control device controls the calibration assembly component so that the temperature environment inside the furnace body is uniform and constant.

2. The compressor test piece outlet temperature sensing part calibration device according to claim 1, characterized in that: The frame structure comprises an upper panel, a lower bottom plate, a left side plate and a right side plate, wherein the upper panel, the lower bottom plate, the left side plate and the right side plate are connected to each other to form a hollow frame, and the sensing part mounting hole is arranged on the upper panel.

3. The compressor test piece outlet temperature sensing part calibration device according to claim 2, characterized in that: The calibration assembly component includes multiple lead screws, a support plate, at least one heating rod and at least one temperature-controlled thermocouple. The lower end of the lead screw passes through the support plate and is connected and fixed to the lower base plate. One end of the heating rod and one end of the temperature-controlled thermocouple are both installed on the support plate. The other end of the heating rod and the other end of the temperature-controlled thermocouple are inserted into the furnace body, and the lower end of the furnace body is arranged on the upper end surface of the support plate.

4. The compressor test piece outlet temperature sensing part calibration device according to claim 3, characterized in that: A first blind hole is arranged near the edge of the lower end of the furnace body, and the other end of the temperature-controlling thermocouple is inserted into the first blind hole to control the temperature inside the furnace body.

5. The compressor test piece outlet temperature sensing part calibration device according to claim 3, characterized in that: The calibration assembly component also includes a heat dissipation fan, which is installed on the lower base plate and is located below the support plate.

6. The compressor test piece outlet temperature sensing part calibration device according to claim 2, characterized in that: The test control device includes a temperature control meter, a relay and a control circuit. The temperature control meter is installed on the upper panel and is used to calibrate the temperature setting; the relay is installed on the lower base plate, and the control circuit connects the temperature control meter and the relay.

7. The compressor test piece outlet temperature sensing part calibration device according to claim 4, characterized in that: The temperature-controlling thermocouple is an S-type thermocouple, and a side head of the temperature-controlling thermocouple is installed at a fixed position in the first blind hole.

8. The compressor test piece outlet temperature sensing part calibration device according to claim 7, characterized in that: The side head of the temperature-controlling thermocouple is located 12 mm away from the upper end of the furnace body.

9. The compressor test piece outlet temperature sensing part calibration device according to claim 1, characterized in that: A second blind hole is formed on the upper end surface of the temperature-averaging block, and the calibrated temperature sensing part is inserted into the second blind hole.

10. The compressor test piece outlet temperature sensing part calibration device according to claim 9, characterized in that: The temperature-averaging block is made of copper-based alloy material.

11. The compressor test piece outlet temperature sensing part calibration device according to claim 2, characterized in that: The upper panel is provided with at least one stripe hole, the left panel and the right panel are respectively provided with at least one stripe hole, and the lower bottom panel is provided with an arc-shaped hole for enhancing the heat dissipation of the outer frame.

12. A method for calibrating the outlet temperature sensing part of a compressor test piece, characterized in that: The calibration method adopts the compressor test piece outlet temperature sensing part calibration device according to any one of claims 1 to 11, and the calibration method comprises the following steps: S1. Place the temperature-averaging block of the calibration device in the furnace, place the calibration device on a horizontal fixed surface, and turn on the power supply; S2, vertically placing the calibrated thermocouple in the cavity of the furnace body so that the bottom of the temperature sensing part mounting seat fits the upper end surface of the furnace body; S3, connecting each channel of the calibrated temperature sensing part to the temperature data acquisition system; S4. Start the test control device to electrically heat the high-temperature heating rod, increase the temperature of the furnace body cavity and the temperature equalizing block cavity where the calibrated sensing part is placed, and feed back the temperature signal to the test control device; when the temperature reaches the target temperature value, the test control device will control the heating rate of the heating rod to make the inside of the furnace body a uniform and constant temperature environment.

13. The method for calibrating the outlet temperature sensing portion of a compressor test piece according to claim 12, characterized in that: The step S4 further includes: clicking a start button, the control panel displays the current furnace temperature value, and setting a target temperature value in the control panel; After the settings are completed, the test controller issues a command and the heating rod starts to heat the inside of the furnace cavity; The temperature sensing part to be calibrated performs temperature sensing, and after the control panel displays that the furnace temperature has reached the target setting value; After waiting for a while, the temperature data acquisition system is used to read the temperature value of each channel of the sensing part respectively, and the read temperature value is compared with the target temperature value to evaluate whether the temperature sensing part is working normally and the temperature measurement accuracy of each measuring point.

14. The method for calibrating the outlet temperature sensing portion of a compressor test piece according to claim 12, wherein: In step S2, the furnace mouth gap of the furnace body is blocked with high-temperature asbestos.

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