CN-121994367-A - Double-station heat-resistant Gao Wenzong-temperature-sensitive part

Abstract

The invention relates to the technical field of high-temperature and high-pressure tests of aeroengines, and particularly discloses a double-station heat-resistant Gao Wenzong-temperature-sensitive part which is suitable for a cooling-free working condition and a cooling working condition and comprises a shell, a lead device, a mounting seat and a supporting framework; the shell comprises a front test piece and a rear protective sleeve which are integrally woven and formed by ceramic matrix composite materials, wherein the front test piece is semi-cylindrical in windward side, a temperature taking cavity is formed in the front test piece, a vent hole is formed in the outer wall of the front test piece, a thermocouple is arranged in the temperature taking cavity, the lead device comprises a ceramic tube, a lead tube and a shielding cable accessory, the front test piece and the rear protective sleeve are connected through a stepped combined groove by a supporting framework, a bent water-cooling pipeline is formed in the front test piece and the rear protective sleeve, and a cavity of the supporting framework and the front test piece is filled and sealed by high-temperature cement. The invention can realize short-time high-temperature measurement under the condition of no cooling, and can obtain long-time stable total temperature acquisition capacity under the condition of cooling, thereby taking into account the structural reliability and the temperature measurement precision under the extreme gas environment.

Inventors

• ZHANG TAO
• SUN QICHAO
• WEI HAIQIAO
• LI ZHENHUAN
• WANG CHANYUAN
• ZHAO WANHUI
• ZENG WEN
• HE YEGUANG

Assignees

• 沈阳航空航天大学

Dates

Publication Date

20260508

Application Date

20251230

Claims (10)

1. 1. The double-station heat-resistant Gao Wenzong-temperature-sensitive part is suitable for a cooling-free working condition and a cooling working condition and is characterized by comprising a shell, a lead device, a mounting seat (2) and a supporting framework (6); The shell comprises a front test piece (1) and a rear protective sleeve (7), wherein the front test piece (1) and the rear protective sleeve are integrally woven and formed by ceramic matrix composite materials, the front test piece (1) is semi-cylindrical in windward surface, a temperature taking cavity (11) is arranged in the front test piece, a vent hole (12) is formed in the outer wall of the temperature taking cavity, and a thermocouple (13) is arranged in the temperature taking cavity; The support framework (6) is provided with a stepped combined groove (61) near the side parts of the front test piece (1) and the rear protective sleeve (7), and the tail part of the front test piece (1) and the head part of the rear protective sleeve (7) are respectively bent and embedded into corresponding adapting sections of the stepped combined groove (61), so that the combined installation of the front test piece (1), the support framework (6) and the rear protective sleeve (7) is realized; a bent water-cooling pipeline (5) is formed inside the supporting framework, the water-cooling pipeline (5) comprises a water inlet pipeline (51) and a water outlet pipeline (52), and the water inlet pipeline and the water outlet pipeline are respectively connected with an external water source through a water inlet joint (53) and a water outlet joint (54); The mounting seat (2) comprises a circumferential boss (21) and a cover plate (22), and the cover plate (22) and the circumferential boss (21) are sealed by welding; The lead device comprises a ceramic tube, a lead tube (3) and a shielding cable accessory (4), wherein the ceramic tube comprises a double-hole ceramic tube and a single-hole ceramic tube, the double-hole ceramic tube is arranged in the temperature taking cavity (11), and the single-hole ceramic tube is respectively sleeved on two pins of the thermocouple and is led into the lead tube (3) through a cavity between the front test piece (1) and the supporting framework (6).
2. 2. The duplex Kuang Naigao Wen Zongwen receptor according to claim 1, wherein the gaps between the stepped combination groove (61) and the front test piece (1) and the rear protective sleeve (7) and the gaps between the front test piece (1) and the rear protective sleeve (7) are filled with high-temperature sealant.
3. 3. Duplex Kuang Naigao Wen Zongwen receptor according to claim 2, wherein the cavity between the support skeleton (6) and the front test piece (1) is filled and sealed with a high temperature cement.
4. 4. The duplex Kuang Naigao Wen Zongwen sensing part according to claim 3, wherein the front end of the lead tube (3) is welded and sealed after being connected with the cover plate (22) through threads, the tail of the lead tube (3) is connected with the shielding cable accessory (4) through threads, a porous threading pressing plate (41) is arranged in the shielding cable accessory (4), and a wire of the thermocouple (13) is connected with a compensation wire through the shielding cable accessory (4) after being regulated by the porous threading pressing plate (41).
5. 5. The duplex Kuang Naigao Wen Zongwen receptor according to claim 1, wherein the support skeleton (6) is integrally formed by 3D printing, and the water inlet connector (53) and the water outlet connector (54) are welded and sealed after being screwed with the cover plate (22).
6. 6. The duplex Kuang Naigao Wen Zongwen sensing part according to claim 1, wherein the temperature taking cavity arranged in the front test piece (1) is opposite to the windward side, and the air leakage holes (12) are symmetrically distributed on two sides of the temperature taking cavity (11) and are respectively communicated with the temperature taking cavities (11) one by one.
7. 7. Duplex Kuang Naigao Wen Zongwen sensor according to claim 1, wherein the thermocouple (13) is a two-stage precision type B thermocouple, the non-hot end part of which is covered with a ceramic tube, and the hot end is exposed outside the ceramic tube.
8. 8. The duplex Kuang Naigao Wen Zongwen receptor of claim 1 wherein the housing surface is deposited with an environmental barrier coating.
9. 9. The duplex Kuang Naigao Wen Zongwen sensor according to claim 1, wherein the front test piece (1) performs short-time temperature measurement by means of the high temperature resistance of the ceramic matrix composite under a non-cooling condition, and performs cooling by the water cooling pipeline (5) under a cooling condition so as to realize long-time stable temperature measurement of the total temperature sensor.
10. 10. The duplex Kuang Naigao Wen Zongwen receptor according to claim 9, wherein the external cooling water source is regulated according to the total temperature signal output by the thermocouple (13), when the detected temperature exceeds a preset threshold, the water inlet flow of the water cooling pipeline (5) is increased, and when the temperature is reduced, the water inlet flow is reduced, so that the dynamic matching of the cooling capacity and the gas temperature is realized.

Description

Double-station heat-resistant Gao Wenzong-temperature-sensitive part Technical Field The invention relates to the technical field of high-temperature and high-pressure testing of aeroengines, in particular to a double-station heat-resistant Gao Wenzong-temperature-sensitive part. Background In high-performance thermodynamic mechanical equipment such as an aero-engine, a gas turbine and the like, the total gas temperature is a key parameter reflecting the combustion state, the heat load distribution and the safety margin of turbine components, and the measurement accuracy is directly related to the optimization of a combustion control strategy, the improvement of the efficiency of the whole machine and the reliability of operation safety monitoring. With the development of aviation power devices to higher thrust-weight ratio and higher circulation temperature, the main combustion area and the gas temperature before the turbine are generally higher than 1600 ℃, and can reach more than 1800 ℃ even in short time under partial working conditions, and meanwhile, the total temperature sensing part is required to meet the requirements of extremely high temperature resistance, structural strength and temperature measurement stability in practical application along with megapascal-level high-pressure gas environment. In order to realize continuous measurement of total temperature of fuel gas, a total temperature sensing part formed by metal base materials is widely adopted in the prior art, and a water cooling flow passage is arranged in the total temperature sensing part to reduce the structural temperature and avoid high-temperature failure. The water-cooled total temperature probe can prolong the service life to a certain extent, but the integral structure of the water-cooled total temperature probe highly depends on continuous supply of a cooling system, and the working condition adaptability is single. On one hand, the temperature resistance limit of the metal-based material is limited, so that the upper limit of temperature measurement is difficult to meet the requirement of a new generation of high-temperature gas environment, on the other hand, the heat conduction coupling between the cooling flow channel and the temperature measuring structure is easy to form local temperature drop in a temperature measuring area, so that the measurement result deviates from the total temperature of the real gas, the correction is needed by relying on a complex compensation model, and the stable precision is difficult to maintain for a long time in practical application. In addition, traditional water-cooling is felt portion and is adopted integral type or simple plug-in type structure more, and the front end is got and is got the connection form between temperature portion, middle part bearing structure and the rear end lead wire structure comparatively singleness for narrow and small space in integrated into one piece's the casing for the installation degree of difficulty of thermocouple increases. Under the conditions of high temperature, high pressure and strong vibration, the structure assembly part is easy to generate thermal expansion mismatch, stress concentration or relative displacement, so that the assembly difficulty is increased, and the long-term reliability of the whole structure is also influenced. Meanwhile, as the internal space of the sensing part is limited, the arrangement and the fixing mode of the thermocouple and the lead wires thereof are greatly restricted, once the cooling medium is interrupted for a short time, the sensing part is difficult to continue to work safely in a cooling-free state, and the risk of rapid failure exists. Therefore, a new structural design of the total temperature sensing part is needed, stable combined installation among the front test piece, the supporting structure and the rear protection structure can be realized while high temperature resistance and high structural strength are maintained, a short-time cooling-free working condition and a long-time water cooling working condition are compatible, and a high-precision and long-service-life total temperature measuring effect can be obtained in an extreme gas environment. Disclosure of Invention Aiming at the defects in the prior art, the invention provides the double-station temperature-resistant Gao Wenzong-temperature-sensitive part, which can realize short-time high-temperature measurement under the condition of no cooling and obtain long-time stable total temperature acquisition capacity under the condition of cooling, thereby taking into account the structural reliability and the temperature measurement precision under the extreme gas environment. In order to achieve the above purpose, the technical scheme of the invention is as follows: the double-station heat-resistant Gao Wenzong-temperature-sensitive part is suitable for a cooling-free working condition and a cooling working condition and comprises a shell, a lea