一种汽轮机轴承温度监测装置
By employing multiple thermocouple temperature measuring elements to independently measure and compare temperatures on the same heat-conducting block in the turbine bearing temperature monitoring device, the problems of ignoring local overheating and false faults in the existing technology have been solved, achieving higher sensitivity and reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI HANFENG POWER GENERATION CO LTD
- Filing Date
- 2025-07-09
- Publication Date
- 2026-07-17
AI Technical Summary
In the existing technology, the multi-point temperature measurement method may cause the turbine bearing temperature monitoring system to ignore the measurement value of excessively high local temperature, which reduces the sensitivity and accuracy of the system, and is prone to false fault shutdown due to thermocouple abnormalities.
A turbine bearing temperature monitoring device is adopted, including a protective sleeve, multiple thermocouple temperature measuring elements, a fixing component, and an elastic component. The thermocouple temperature measuring elements are installed on the same heat-conducting block. Multiple independent temperature measurement results are compared and analyzed, outliers are eliminated, and the average value is taken to ensure the accuracy of the temperature measurement results.
This improved the sensitivity and reliability of the shutdown protection system, avoided false faults caused by a single thermocouple malfunction, and ensured the safe operation of the steam turbine.
Smart Images
Figure CN224517957U_ABST
Abstract
Claims
1. A turbine bearing temperature monitoring device, characterized by, include: The protective sleeve (10) includes a heat-conducting block (11), an installation sleeve (12) and a blocking plate (13). The installation sleeve (12) is hollow inside and has an installation cavity. The heat-conducting block (11) and the blocking plate (13) are respectively located at both ends of the installation sleeve (12). Multiple thermocouple temperature sensing elements (20) are respectively disposed in the mounting cavity. The temperature sensing end of the thermocouple temperature sensing element (20) is fixedly connected to the heat-conducting block (11). The connecting wire (21) of the thermocouple temperature sensing element (20) passes through the blocking plate (13). The number of thermocouple temperature sensing elements (20) is three or more. A fixing member (30) is coaxially sleeved on the outer periphery of the mounting sleeve (12) and has an adjustment hole that slides with the mounting sleeve (12). A hollow stud (31) is provided at one end of the fixing member (30) adjacent to the heat-conducting block (11), and the mounting sleeve (12) passes through the hollow stud (31). An elastic element (40) is provided on the side of the fixing element (30) adjacent to the heat-conducting block (11). One end of the elastic element (40) abuts against the fixing element (30), and the other end abuts against the heat-conducting block (11) or the mounting sleeve (12). The elastic element (40) is configured to have a preload force that moves the heat-conducting block (11) away from the fixing element (30).
2. A turbine bearing temperature monitoring device according to claim 1, characterised in that, The heat-conducting block (11) has multiple mounting slots at one end adjacent to the mounting sleeve (12). Each mounting slot corresponds to a thermocouple temperature measuring element (20), and the end of the thermocouple temperature measuring element (20) is housed in the corresponding mounting slot.
3. The turbine bearing temperature monitoring device according to claim 1, characterized in that, The number of thermocouple temperature measuring elements (20) is three, and the three thermocouple temperature measuring elements (20) are arranged in a circular array with the central axis of the mounting sleeve (12) as the center.
4. A turbine bearing temperature monitoring device according to claim 1, wherein, The outer periphery of the plurality of thermocouple temperature sensing elements (20) is also wrapped with a shielding layer (22), the shielding layer (22) is connected to a grounding wire (221), and the grounding wire (221) passes through the end plate (13).
5. A turbine bearing temperature monitoring device according to claim 4, wherein, The blocking plate (13) has a through hole (131) for the connecting wire (21) and the grounding wire (221) to pass through.
6. A turbine bearing temperature monitoring device according to claim 1, wherein, The heat-conducting block (11) is provided with a first flange plate (111) along its own circumference, and the mounting sleeve (12) is provided with a second flange plate (121) along its own circumference at one end adjacent to the heat-conducting block (11). The protective sleeve (10) further includes a first gasket (14) disposed between the first flange plate (111) and the second flange plate (121). The first flange plate (111), the first gasket (14) and the second flange plate (121) are connected by a first screw (15). The first gasket (14) has a first clearance hole for the first screw (15) to pass through. The nut end of the first screw (15) is located at the end of the heat-conducting block (11) away from the mounting sleeve (12). The elastic element (40) abuts against the second flange plate (121).
7. A turbine bearing temperature monitoring device according to claim 1, wherein, The outer contour of the fastener (30) is a regular hexagon.
8. A turbine bearing temperature monitoring device according to claim 1, wherein, The end face of the fixing member (30) away from the heat-conducting block (11) is provided with a sealing groove, the sealing groove is connected to the adjustment hole, and the bottom surface of the sealing groove is provided with a plurality of first mounting holes at equal intervals along its own circumference. The turbine bearing temperature monitoring device further includes a sealing assembly (50), which comprises: A sealing gasket (51) is annular and disposed in the sealing groove. One end of the sealing gasket (51) protrudes from the opening of the sealing groove. The sealing gasket (51) has a second clearance hole that corresponds one-to-one with the first mounting hole. A sealing plate (52) is disposed on the side of the sealing gasket (51) away from the fixing member (30), and the sealing plate (52) has second mounting holes corresponding one-to-one with the first mounting holes; and Multiple second screws (53) are respectively inserted into the corresponding second mounting holes and second clearance holes, and are threadedly connected to the first mounting holes.
9. A turbine bearing temperature monitoring device according to claim 1, wherein, The fastener (30) is provided with a second gasket (32) on the side adjacent to the heat-conducting block (11), and the second gasket (32) is coaxially sleeved on the outer periphery of the mounting sleeve (12).
10. A turbine bearing temperature monitoring device according to claim 1, wherein, The thermocouple temperature measuring element (20) is welded to the heat-conducting block (11).