US 11,680,851 B2
Device for measuring surface temperature of turbine blade based on rotatable prism
Chao Wang, Sichuan (CN); Jing Jiang, Sichuan (CN); Anmei Qiu, Sichuan (CN); Yekui Zhong, Sichuan (CN); Yi Niu, Sichuan (CN); Peifeng Yu, Sichuan (CN); Zezhan Zhang, Sichuan (CN); Ying Duan, Sichuan (CN); Xueke Gou, Sichuan (CN); and Guiyun Tian, Sichuan (CN)
Assigned to University of Electronic Science and Technology of China, Sichuan (CN)
Filed by University of Electronic Science and Technology of China, Sichuan (CN)
Filed on May 20, 2021, as Appl. No. 17/326,313.
Claims priority of application No. 202010434918.2 (CN), filed on May 21, 2020.
Prior Publication US 2021/0270674 A1, Sep. 2, 2021
Int. Cl. G01J 5/00 (2022.01); G01J 5/0806 (2022.01); G01J 5/10 (2006.01); G01M 15/02 (2006.01); G01M 15/14 (2006.01); G01J 5/04 (2006.01); G01J 5/48 (2022.01)
CPC G01J 5/0088 (2013.01) [G01J 5/04 (2013.01); G01J 5/0806 (2013.01); G01J 5/10 (2013.01); G01M 15/02 (2013.01); G01M 15/14 (2013.01); G01J 5/485 (2022.01); G01J 2005/106 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A device for measuring a surface temperature of a turbine blade based on a rotatable prism comprises a probe, a prism rotating apparatus and an optical focusing apparatus, wherein:
the prism rotating apparatus and the optical focusing apparatus are located at an outer wall of the probe;
the probe comprises a probe outer casing, a probe inner casing, a water-cooled casing pipe, a sapphire window piece, a quartz prism, a light pipe, a collimating lens, a focusing lens and an infrared array detector, wherein:
the probe outer casing, having a bottle-shaped structure, a cooling water inlet and a cooling water outlet, comprises a bottle body, a bottle neck, a bottle nozzle, wherein a diameter of the bottle nozzle is smaller than that of the bottle body, a diameter of the bottle neck is gradually decreased from the bottle body to the bottle nozzle, the cooling water inlet is provided at a lower portion of the bottle body, the cooling water outlet is provided at an upper portion of the bottle body;
the probe inner casing is provided within the probe outer casing, a cooling chamber is formed between the probe inner casing and the probe outer casing, the probe inner casing is tubular, a top portion of the probe inner casing is sealed with the bottle neck of the probe outer casing, a bottom portion of the probe inner casing is level with a bottom portion of the probe outer casing;
the water-cooled casing pipe, which comprises a water entry pipe and a water discharging pipe, is wound on the probe inner casing, wherein the cooling water inlet of the probe outer casing is communicated with the water entry pipe of the water-cooled casing pipe, the cooling water outlet of the probe outer casing is communicated with the water discharging pipe of the water-cooled casing pipe;
the sapphire window piece is located at a bottle mouth of the probe outer casing, the quartz prism is located within an upper portion of the probe inner casing, the light pipe is tubular and is located within a lower portion of the probe inner casing;
the collimating lens, the focusing lens and the infrared array detector are arranged within the light pipe in sequence along a light propagation direction; the quartz prism is configured to refract light passing through the sapphire window piece for allowing the light to accurately enter the light pipe;
the prism rotating apparatus comprises a rotary motor, a worm, a gear and a prism rotary table, wherein one end of the prism rotary table is located within the probe, another end of the prism rotary table is located outside the probe, a rotary through hole is provided in the probe inner casing and the probe outer casing for accommodating the prism rotary table, the one end of the prism rotary table is fixed with the quartz prism, the another end of the prism rotary table is mechanically connected with the rotary motor, the rotary motor drives the prism rotary table to achieve any angle rotation of the quartz prism;
the optical focusing apparatus comprises a telescopic motor, a coupler, a lead screw and a drive rod, wherein the drive rod is fixed with an outer wall of the light pipe, a slot is provided in the probe inner casing and the probe outer casing for allowing the drive rod to move, the drive rod is sleeved to the lead screw, the telescopic motor is connected with the lead screw through the coupler, so that the telescopic motor rotates to drive the lead screw, so as to further drive the drive rod to move along the slot.