Working efficiency detection device for steam turbine of thermal power plant
By creating a lightweight groove on the impeller shaft and equipping it with a rotating gear of equal mass, a gear speed sensor is used for non-contact detection, which solves the problem of kinetic energy reduction caused by contact with the detection instrument and improves detection accuracy and work efficiency.
Patent Information
- Application Number
- CN202511811842.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-04
- Publication Date
- 2026-02-27
AI Technical Summary
In existing technologies, when testing the operating efficiency of a steam turbine, the contact between the testing instrument and the shaft causes a slowdown in kinetic energy, affecting the accuracy of the test values.
A lightweight groove is made on the impeller shaft and fitted with a rotating gear of equal mass. Non-contact detection is performed using a gear speed sensor to detect the shaft speed.
This improved the accuracy of the measured values, avoided the influence of the measuring instruments on the shaft kinetic energy, and ensured the accuracy of the turbine's working efficiency.
Smart Images
Figure CN121576147A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of steam turbine detection technology in thermal power plant, in particular to a kind of steam turbine working efficiency detection device in thermal power plant. BACKGROUND
[0002] Steam turbine is one of the most important equipment in thermal power plant, so its working efficiency determines the power generation efficiency of the whole system, and when detecting the working efficiency of steam turbine, the rotating speed of impeller shaft is often detected, and the detection instrument is usually needed to be sleeved on the shaft, and the sleeved detection instrument itself has a certain weight, which will slow down the kinetic energy of the shaft when the shaft rotates, thereby causing the test value to be smaller. SUMMARY
[0003] To achieve the above purpose, the present application is realized by the following technical scheme: a kind of steam turbine working efficiency detection device in thermal power plant, including steam turbine body, the steam turbine body is used to support mechanism element, motor efficiency detection assembly is equipped on the steam turbine body; The motor efficiency detection assembly comprises: impeller shaft, rotating blade, rotating gear, square hole, light groove and gear rotation speed sensor. The light groove is opened on the impeller shaft, the rotating blade is installed on the impeller shaft, the impeller shaft is installed inside the steam turbine body, the square hole is opened on the rotating gear, the rotating gear is sleeved in the light groove through the square hole, and the gear rotation speed sensor is installed on the inner wall surface of the steam turbine body and points to the rotating gear installation position.
[0004] Preferably, the part of the impeller shaft at the light groove is made of a material with higher hardness.
[0005] Preferably, the mass of the rotating gear is equal to the mass of the sheared material at the light groove on the impeller shaft.
[0006] Advantages The present application provides a kind of steam turbine working efficiency detection device in thermal power plant, compared with prior art, has the following beneficial effects: The present application provides a kind of steam turbine working efficiency detection device in thermal power plant, compared with prior art, has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS
[0007] Figure 1 It is three-dimensional structure schematic view of the steam turbine working efficiency detection device in thermal power plant of the present application.
[0008] Figure 2 It is a side view schematic diagram of a steam turbine working efficiency detection device of a thermal power plant.
[0009] Figure 3 It is a side view schematic diagram of a steam turbine working efficiency detection device of a thermal power plant.
[0010] Figure 4 It is a side view schematic diagram of a steam turbine working efficiency detection device of a thermal power plant.
[0011] In the figure: 1, steam turbine body; 2, impeller shaft; 3, rotating blade; 4, rotating gear; 5, square hole; 6, light groove; 7, gear rotation speed sensor DETAILED DESCRIPTION
[0012] Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.
[0013] Please refer to Figures 1-3 , the present application provides a technical solution.
[0014] Embodiment: Please refer to the attached Figures 1-3 In the specific implementation process: a steam turbine working efficiency detection device of a thermal power plant, comprising a steam turbine body 1, the steam turbine body 1 is used for supporting mechanism components, the steam turbine body 1 is provided with a motor efficiency detection assembly; The motor efficiency detection assembly comprises: an impeller shaft 2, a rotating blade 3, a rotating gear 4, a square hole 5, a light groove 6 and a gear rotation speed sensor 7; The light groove 6 is opened on the impeller shaft 2, the rotating blade 3 is installed on the impeller shaft 2, the impeller shaft 2 is installed inside the steam turbine body 1, the square hole 5 is opened on the rotating gear 4, the rotating gear 4 is sleeved in the light groove 6 through the square hole 5, and the gear rotation speed sensor 7 is installed on the inner wall surface of the steam turbine body 1 and points the detection end to the installation position of the rotating gear 4.
[0015] It should be noted that after the steam enters the steam turbine body 1 and hits the rotating blade 3, the impeller shaft 2 will be rotated, and then the impeller shaft 2 will drive the rotating gear 4 to rotate, and then the teeth on the rotating gear 4 will pass through the detection end of the gear rotation speed sensor 7 one by one, so that the working efficiency of the steam turbine body 1 can be detected.
[0016] As a preferred solution, further, the part of the impeller shaft 2 at the light groove 6 is provided with a material with higher hardness.
[0017] It is to be noted that since the portion of the impeller shaft 2 at the lightening groove 6 is thinner than the normal portion, a material with higher hardness is used to ensure the safety of the entire impeller shaft 2, thereby preventing the impeller shaft 2 from being broken at the lightening groove 6.
[0018] As a preferred solution, further, the mass of the rotating gear 4 needs to be equal to the mass of the material sheared at the lightening groove 6 of the impeller shaft 2.
[0019] It is to be noted that the mass of the rotating gear 4 and the mass of the material sheared at the lightening groove 6 of the impeller shaft 2 are to ensure that the mass of the original impeller shaft 2 is consistent with the mass of the impeller shaft 2 with the rotating gear 4, thereby not affecting the working efficiency of the turbine body 1.
[0020] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A device for detecting the operating efficiency of a steam turbine of a thermal power plant, comprising a steam turbine body for supporting the mechanical elements of the steam turbine, characterized in that, The steam turbine body is provided with a motor efficiency detection assembly; The motor efficiency detection assembly comprises an impeller shaft, rotating blades, rotating gears, a square hole, a light weight groove and a gear rotation speed sensor. The light weight groove is arranged on the impeller shaft, the rotating blades are installed on the impeller shaft, the impeller shaft is installed in the steam turbine body, the square hole is arranged on the rotating gears, the rotating gears are sleeved in the light weight groove through the square hole, and the gear rotation speed sensor is installed on the inner wall of the steam turbine body and points the detection end to the installation position of the rotating gears.
2. A device for detecting the working efficiency of a steam turbine of a thermal power plant according to claim 1, characterized in that, The part of the impeller shaft at the light weight groove is made of a material with higher hardness.
3. The device for detecting the working efficiency of a steam turbine in a thermal power plant according to claim 1, characterized in that, The mass of the rotating gears is equal to the mass of the sheared material at the light weight groove of the impeller shaft.