A turbine runout tester with a protection mechanism

Abstract

This utility model relates to the technical field of turbine runout testing instruments, and discloses a turbine runout testing instrument with a protection mechanism. The instrument includes a frame, which is mounted on the end of the turbine main shaft via a bracket. Adjustment mechanisms are installed on the left and right sides of the frame, and an eddy current displacement sensor is installed at the lower end of each adjustment mechanism via a protection mechanism. The turbine runout testing instrument with a protection mechanism described in this utility model uses a knob to drive a worm gear to rotate. The threaded rod cannot rotate under the sliding limit action of the limiting block on the inner wall of the connecting sleeve and the limiting groove on its own outer wall; it can only move axially. Because the limiting groove of the threaded rod has a scale, and the indicator ring on the upper end of the connecting shell is correspondingly embedded in the limiting groove, the operator can accurately read the movement of the threaded rod through the scale aligned with the indicator ring. The large transmission ratio and smooth operation of the worm gear enable fine adjustment of the eddy current displacement sensor.

Description

Technical Field

[0001] This utility model relates to the technical field of turbine swing testers, and in particular to a turbine swing tester with a protection mechanism. Background Technology

[0002] Turbine runout is a key technical indicator for measuring the operational stability of its main shaft. It directly reflects the radial deviation of the main shaft during rotation and has a significant impact on the turbine's operating efficiency, service life, and safety performance. Eddy current displacement sensors, with their advantages of non-contact measurement, fast response speed, high measurement accuracy, and strong environmental adaptability, have become the core equipment for turbine runout detection. By detecting changes in the eddy current effect between the sensor and the main shaft surface, they can accurately convert these changes into runout displacement data, providing a reliable basis for turbine condition monitoring and fault diagnosis.

[0003] In practical applications, the detection accuracy of eddy current sensors is highly dependent on the initial distance between the sensor and the turbine's main shaft during installation. Excessive distance deviation can directly lead to distorted measurement data and affect the accuracy of swing determination. However, traditional installation methods have significant limitations: operators must first use tools such as rulers to repeatedly measure the distance between the sensor and the main shaft, and then adjust the position by tightening the nuts at both ends of the sensor. The entire process is not only cumbersome and time-consuming, but the displacement of the nuts is also difficult to control precisely, making it impossible to achieve fine-tuned distance adjustment. This makes it highly susceptible to installation errors affecting the detection results and failing to meet the actual needs of high-precision swing monitoring of turbines. Utility Model Content

[0004] The main purpose of this utility model is to provide a turbine runout tester with a protection mechanism, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a turbine swing tester with a protection mechanism, including a frame, the frame being mounted on the end of the turbine main shaft via a bracket, adjustment mechanisms being installed on the left and right sides of the frame, and an eddy current displacement sensor being installed at the lower end of the adjustment mechanism via a protection mechanism;

[0006] The adjustment mechanism includes a threaded rod, a connecting shell, a connecting sleeve, a limiting groove, a limiting block, a worm gear, a worm, and a knob. The limiting groove is evenly spaced on the outer wall of the threaded rod. The outer periphery of the threaded rod passes through the connecting shell and is slidably connected to the middle of the connecting sleeve. The lower end of the connecting sleeve is fixedly connected to the left and right sides of the frame. The outer periphery of the limiting block is evenly spaced on the inner wall of the connecting sleeve. The inner side of the limiting block is slidably connected to the inside of the limiting groove. The worm gear and worm are installed inside the connecting shell. The lower part of the connecting shell is fixedly connected to the upper part of the connecting sleeve, and the worm gear and worm mesh with each other. The outer periphery of the threaded rod is threadedly connected to the middle of the worm gear. One end of the worm passes through the wall of the connecting shell and is fixedly connected to the middle of the knob.

[0007] Preferably, the eddy current displacement sensor and the central axis of the threaded rod coincide, the two threaded rods are at a 90° angle, and the threaded rod is perpendicular to the central axis of the turbine main shaft.

[0008] Preferably, the knob has a groove in the middle, and a hexagonal connector is fixedly connected inside the groove.

[0009] Preferably, the limiting groove is provided with a scale inside, and an indicator ring is provided inside the limiting groove, with the outer side of the indicator ring fixedly connected to the upper end of the connecting shell.

[0010] Preferably, the protective mechanism includes a fixed plate, connecting columns, and a connecting plate. The upper side of the fixed plate is fixedly connected to the lower end of the threaded rod. The upper ends of the multiple connecting columns are installed at equal intervals on the lower outer side of the fixed plate, and the lower ends of the multiple connecting columns are installed at equal intervals on the upper outer periphery of the connecting plate. The eddy current displacement sensor is installed in the middle of the connecting plate.

[0011] Preferably, a protective cover is threaded onto the lower outer periphery of the connecting plate, and the protective cover covers the lower outer periphery of the eddy current displacement sensor.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The worm gear is driven to rotate by a knob. Because the worm gear meshes with the worm wheel in the connecting housing, and the worm wheel is threadedly connected to the threaded rod, the threaded rod cannot rotate under the sliding limit action of the limiting block on the inner side wall of the connecting sleeve and the limiting groove on its own outer side wall. It can only move axially. Because there is a scale in the limiting groove of the threaded rod, the indicator ring at the upper end of the connecting housing is embedded in the limiting groove. The operator can accurately read the amount of movement of the threaded rod through the scale aligned with the indicator ring. The worm gear transmission ratio is large and the operation is smooth, so as to realize the fine adjustment of the eddy current displacement sensor.

[0014] 2. The fixed plate, connecting column and connecting plate form a support structure to securely install the sensor. The protective cover under the connecting plate can provide physical protection for the eddy current displacement sensor when it is not being tested or transported, so as to avoid damage to it. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a turbine runout tester with a protective mechanism according to the present invention;

[0016] Figure 2 This is a schematic diagram of the adjustment mechanism of a turbine runout tester with a protection mechanism according to the present invention;

[0017] Figure 3 This is a schematic diagram of the indicator ring structure of a turbine runout tester with a protection mechanism according to this utility model;

[0018] Figure 4 This is a schematic diagram of the protective mechanism structure of a turbine swing tester with a protective mechanism according to the present invention.

[0019] In the diagram: 1. Frame; 2. Adjustment mechanism; 201. Threaded rod; 202. Connecting shell; 203. Connecting sleeve; 204. Limiting groove; 205. Limiting block; 206. Worm gear; 207. Worm; 208. Knob; 209. Indicator ring; 2010. Scale; 3. Eddy current displacement sensor; 4. Protective mechanism; 401. Fixing plate; 402. Connecting column; 403. Connecting plate; 404. Protective cover. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] like Figure 1-4 As shown, a turbine swing tester with a protection mechanism includes a frame 1, which is mounted on the end of the turbine main shaft via a bracket. Adjustment mechanisms 2 are installed on the left and right sides of the frame 1, and an eddy current displacement sensor 3 is installed at the lower end of the adjustment mechanism 2 via a protection mechanism 4.

[0022] In this embodiment, the adjusting mechanism 2 includes a threaded rod 201, a connecting shell 202, a connecting sleeve 203, a limiting groove 204, a limiting block 205, a worm gear 206, a worm 207, and a knob 208. The limiting groove 204 is evenly spaced on the outer wall of the threaded rod 201. The outer periphery of the threaded rod 201 passes through the connecting shell 202 and is slidably connected to the middle of the connecting sleeve 203. The lower end of the connecting sleeve 203 is fixedly connected to the left and right sides of the frame 1. The outer sides of the limiting blocks 205 are evenly spaced on the inner wall of the connecting sleeve 203. The inner side of the limiting blocks 205 is slidably connected to the inside of the limiting groove 204. The worm gear 206 and the worm 207 are installed inside the connecting shell 202. The lower part of the connecting shell 202 is fixedly connected to the connecting sleeve. The upper part of 203 is connected to the worm gear 206 and the worm 207, which mesh with each other. The outer circumference of the threaded rod 201 is threadedly connected to the middle of the worm gear 206. One end of the worm 207 passes through the wall of the connecting shell 202 and is fixedly connected to the middle of the knob 208. The central axis of the eddy current displacement sensor 3 and the central axis of the threaded rod 201 are coincident. The two threaded rods 201 form a 90° angle and are perpendicular to the central axis of the turbine main shaft. The knob 208 has a groove in the middle, and a hexagonal connector is fixedly connected inside the groove. The limiting groove 204 has a scale 2010 inside and an indicator ring 209 inside. The outer side of the indicator ring 209 is fixedly connected to the upper end of the connecting shell 202.

[0023] Specifically, the worm gear 207 is driven to rotate by the knob 208. Since the worm gear 207 meshes with the worm wheel 206 in the connecting shell 202, and the worm wheel 206 is threadedly connected to the threaded rod 201, the threaded rod 201 cannot rotate under the sliding limit action of the limiting block 205 on the inner side wall of the connecting sleeve 203 and the limiting groove 204 on its own outer side wall, it can only move axially. Since the limiting groove 204 of the threaded rod 201 is provided with a scale 2010, the indicator ring 209 at the upper end of the connecting shell 202 is correspondingly embedded in the limiting groove 204. The operator can accurately read the movement of the threaded rod 201 through the scale 2010 aligned with the indicator ring 209. The fine adjustment of the eddy current displacement sensor 3 is realized by utilizing the characteristics of large transmission ratio and smooth operation of the worm gear.

[0024] In this embodiment, the protective mechanism 4 includes a fixed plate 401, connecting columns 402, and a connecting plate 403. The upper side of the fixed plate 401 is fixedly connected to the lower end of the threaded rod 201. The upper ends of the multiple connecting columns 402 are installed at equal intervals on the lower outer side of the fixed plate 401. The lower ends of the multiple connecting columns 402 are installed at equal intervals on the upper outer periphery of the connecting plate 403. The eddy current displacement sensor 3 is installed in the middle of the connecting plate 403. A protective cover 404 is threadedly connected to the lower outer periphery of the connecting plate 403. The protective cover 404 covers the lower outer periphery of the eddy current displacement sensor 3.

[0025] Specifically, the fixing plate 401, the connecting column 402 and the connecting plate 403 form a support structure to securely install the sensor, while the protective cover 404 at the bottom of the connecting plate 403 can provide physical protection for the eddy current displacement sensor 3 in non-detection or transportation states, preventing it from being damaged.

[0026] Working principle:

[0027] First, the frame 1 is fixedly installed at the end of the turbine main shaft using a bracket to ensure the overall stability of the device. Before testing, the worm 207 is rotated by knob 208. Because the worm 207 meshes with the worm wheel 206 inside the connecting housing 202, the worm wheel 206 rotates with the worm 207. The threaded rod 201 is threadedly connected to the worm wheel 206. Under the sliding limiting action of the limiting block 205 on the inner side wall of the connecting sleeve 203 and the limiting groove 204 on the outer side wall of the threaded rod 201, the threaded rod 201 cannot rotate but only moves up and down axially, thereby driving the lower end protection mechanism 4 and the eddy current displacement sensor 3 to adjust the height. During the process, the height can be adjusted by the scale in the limiting groove 204. The indicator ring 209 at the upper end of the 2010 and connecting shell 202 precisely controls the adjustment amount; since the two threaded rods 201 are at a 90° angle and are both perpendicular to the central axis of the turbine main shaft, the eddy current displacement sensor 3 at its lower end can detect the main shaft swing from two vertical directions. In the protective mechanism 4, the fixing plate 401, connecting column 402 and connecting plate 403 form a support structure to securely install the sensor. The protective cover 404 at the lower part of the connecting plate 403 can provide physical protection for the eddy current displacement sensor 3 in non-detection or transportation state to prevent it from being damaged.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A water turbine swing range tester with protection mechanism, comprising a frame (1), characterized in that: The frame (1) is mounted on the end of the turbine main shaft by a bracket. Adjustment mechanisms (2) are installed on the left and right sides of the frame (1). An eddy current displacement sensor (3) is installed at the lower end of the adjustment mechanism (2) through a protective mechanism (4). The adjustment mechanism (2) includes a threaded rod (201), a connecting shell (202), a connecting sleeve (203), a limiting groove (204), a limiting block (205), a worm gear (206), a worm (207), and a knob (208). The limiting groove (204) is evenly spaced on the outer wall of the threaded rod (201). The outer periphery of the threaded rod (201) passes through the connecting shell (202) and is slidably connected to the middle of the connecting sleeve (203). The lower end of the connecting sleeve (203) is fixedly connected to the left and right sides of the frame (1). The limiting block (205) is evenly spaced on the outer side. The limiting block (205) is slidably connected to the limiting groove (204) inside the inner side wall of the connecting sleeve (203). The worm wheel (206) and worm (207) are installed inside the connecting shell (202). The lower part of the connecting shell (202) is fixedly connected to the upper part of the connecting sleeve (203), and the worm wheel (206) and worm (207) mesh with each other. The outer circumference of the threaded rod (201) is threadedly connected to the middle part of the worm wheel (206). One end of the worm (207) penetrates the wall of the connecting shell (202) and is fixedly connected to the middle part of the knob (208).

2. The wicket gate tester with protection mechanism according to claim 1, characterized in that: The central axes of the eddy current displacement sensor (3) and the threaded rod (201) coincide with each other, the two threaded rods (201) form a 90° angle, and the threaded rod (201) is perpendicular to the central axis of the turbine main shaft.

3. The wicket gate tester with protection mechanism according to claim 1, characterized in that: The knob (208) has a groove in the middle, and a hexagonal connector is fixedly connected inside the groove.

4. The wicket gate tester with protection mechanism according to claim 1, characterized in that: The limiting groove (204) is provided with a scale (2010) inside, and an indicator ring (209) is provided inside the limiting groove (204). The outer side of the indicator ring (209) is fixedly connected to the upper end of the connecting shell (202).

5. The wicket gate tester with protection mechanism according to claim 4, characterized in that: The protective mechanism (4) includes a fixed plate (401), connecting columns (402) and a connecting plate (403). The upper side of the fixed plate (401) is fixedly connected to the lower end of the threaded rod (201). The upper ends of the multiple connecting columns (402) are installed at equal intervals on the lower outer side of the fixed plate (401). The lower ends of the multiple connecting columns (402) are installed at equal intervals on the upper outer periphery of the connecting plate (403). The eddy current displacement sensor (3) is installed in the middle of the connecting plate (403).

6. The wicket gate tester with protection mechanism according to claim 5, characterized in that: The lower outer periphery of the connecting plate (403) is threaded with a protective cover (404), which covers the lower outer periphery of the eddy current displacement sensor (3).

Images