Axial movement measuring and mounting structure of fan of thermal power plant

Abstract

The utility model belongs to power generation equipment, and particularly relates to an axial movement measuring and mounting structure of a fan of a thermal power plant. The measuring assembly is connected with the fan shaft and is internally provided with an accommodating cavity; the connecting assembly is arranged in the accommodating cavity of the measuring assembly, and comprises a transmission shaft, an input end of the transmission shaft extends out of the accommodating cavity; one end of the threaded rod is connected with the output end of the transmission shaft; the extrusion pipe is connected with the end, away from the transmission shaft, of the threaded rod. The pin rod is arranged on the inner wall of the containing cavity, and the axis of the pin rod is perpendicular to the axis of the extrusion pipe; the fixed end of the spring is connected to the inner wall of the containing cavity, and the telescopic end is connected with the pin rod. According to the utility model, the problem of abrasion between the sensor and the fan shaft caused by direct installation of the photoelectric sensor on the shaft for displacement measurement is solved, and the problem of data deviation caused by influence on the measurement precision due to instantaneous impact fluctuation generated during high-speed operation of the fan is also solved.

Description

Technical Field

[0001] This utility model pertains to power generation equipment, specifically relating to an axial displacement measurement and installation structure for a thermal power plant fan. Background Technology

[0002] In the power generation system of a thermal power plant, the stable operation of the fan plays a crucial role in the system's efficiency and safety. Among them, the axial movement of the fan shaft is a key parameter that needs to be closely monitored, because excessive axial movement can lead to a series of problems such as accelerated bearing wear, seal failure, and even mechanical failure.

[0003] Traditional methods for measuring axial movement in wind turbines involve mounting photoelectric sensors directly on the shaft and measuring axial movement by observing changes in the distance between the sensor and the data receiver. While this simplified design achieves basic measurement functionality, it has significant drawbacks: firstly, the wind turbine shaft inevitably rubs against the sensor during operation, leading to severe sensor wear and a substantial reduction in its lifespan; secondly, high-speed rotation of the wind turbine shaft causes momentary impact fluctuations to the sensor, affecting measurement accuracy and causing data deviations. Utility Model Content

[0004] The purpose of this invention is to provide an axial movement measurement and installation structure for thermal power plant fans that can reduce sensor wear and improve structural stability.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An axial displacement measurement and installation structure for a thermal power plant fan includes:

[0007] Fan shaft;

[0008] A measuring component, which is connected to the fan shaft and has an internal receiving cavity;

[0009] A connecting component, disposed within the receiving cavity of the measuring component, includes:

[0010] A drive shaft, the input end of which extends outward from the receiving cavity;

[0011] A threaded rod, one end of which is connected to the output end of the drive shaft;

[0012] An extrusion tube is connected to the end of a threaded rod away from the drive shaft;

[0013] A pin is disposed on the inner wall of the receiving cavity, and the axis of the pin is perpendicular to the axis of the extrusion tube.

[0014] A spring, the fixed end of which is connected to the inner wall of the receiving cavity, and the telescopic end connected to a pin;

[0015] During operation, the drive shaft drives the threaded rod to move, and the threaded rod drives the extrusion tube to reciprocate within the receiving cavity. The outer side of the extrusion tube pushes the pin to extend and retract out of the receiving cavity, and the extension and retraction end is connected to the fan shaft.

[0016] Furthermore, one end of the fan shaft is provided with a mounting groove, and the inner cavity of the mounting groove is provided with a pin hole.

[0017] Furthermore, the measurement component includes:

[0018] The connecting shaft is slidably installed in the mounting groove of the fan shaft;

[0019] A photoelectric sensor is connected to the end of the connecting shaft away from the mounting groove.

[0020] Furthermore, the fan shaft also includes a threaded fastening sleeve, which engages with the external thread of the connecting shaft via an internal thread.

[0021] Furthermore, a positioning groove is provided inside the fan shaft, which is located on the side of the mounting groove and communicates with the mounting groove; a positioning block is provided on the shaft side of the connecting shaft, and the positioning block cooperates with the positioning groove.

[0022] Furthermore, the axis of the transmission shaft is perpendicular to the axis of the threaded rod, and a driving bevel gear and a driven bevel gear meshing with the driving bevel gear are provided between the transmission shaft and the threaded rod. The axis of the driving bevel gear is connected to the output end of the transmission shaft, and the axis of the driven bevel gear is connected to the threaded rod.

[0023] Furthermore, the end of the extrusion tube away from the threaded rod is tapered and has a threaded hole for use with the threaded rod.

[0024] Furthermore, a limiting hole is formed in the inner cavity of the extrusion tube, and a limiting rod is slidably connected to the inner cavity of the limiting hole. The other end of the limiting rod away from the limiting hole is connected to the inner wall of the receiving cavity of the connecting shaft.

[0025] Furthermore, the bottom of the pin is integrally formed with an arc-shaped plate, which is connected to the extension end of the spring.

[0026] Furthermore, the drive shaft is U-shaped, and an internal hexagon countersunk hole is provided at the end of the drive shaft near the connecting shaft.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] This invention achieves axial movement measurement by incorporating a measuring assembly with a connecting component at the end of a fan shaft. Specifically, a receiving cavity is provided inside the measuring assembly to accommodate it. The measuring assembly consists of four parts: a drive shaft, a threaded rod, a pressing tube, and a pin. The drive shaft drives the threaded rod to rotate, which in turn causes the pressing tube to reciprocate along its axial direction. This causes the pin, which has a spring on its inner wall of the receiving cavity, to be supported by the wall of the pressing tube at its bottom end, causing it to extend and retract out of the receiving cavity, ultimately connecting the measuring assembly to the fan shaft. Unlike traditional direct shaft mounting, this structure avoids direct wear on the sensor from the fan shaft through an auxiliary connection, extending its service life. Furthermore, due to its structural stability, it reduces the instantaneous impact fluctuations on the sensor caused by high-speed fan operation, improving measurement accuracy. Attached Figure Description

[0029] Figure 1 This is a three-dimensional view of the present utility model.

[0030] Figure 2 This is a combined sectional view of the present invention;

[0031] Figure 3 This is a diagram of the fan shaft of this utility model;

[0032] Figure 4 This is a diagram of the measuring component of this utility model;

[0033] Figure 5 This is a diagram of the connection component of this utility model;

[0034] Figure 6 This is a combined diagram of the measuring component and the connecting component of this utility model.

[0035] In the diagram: 1. Fan shaft; 11. Mounting groove; 12. Positioning groove; 13. Pin hole; 14. Threaded fastening sleeve; 2. Measuring assembly; 21. Connecting shaft; 22. Photoelectric sensor; 23. Positioning block; 3. Connecting assembly; 31. Drive shaft; 32. Driving bevel gear; 33. Driven bevel gear; 34. Threaded rod; 35. Extrusion tube; 36. Pin; 37. Spring; 38. Limiting hole; 39. Limiting rod. Detailed Implementation

[0036] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments. However, the following embodiments are only preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this utility model. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0037] like Figures 1-6 In this embodiment, it includes: a fan shaft 1, a measuring component 2, and a connecting component 3;

[0038] The measuring component 2 accommodates the connecting component 3 through its internal cavity, thus connecting the measuring component 2 and the fan shaft 1.

[0039] It should be noted that one end of the fan shaft 1 is provided with a mounting groove 11, and the inner cavity of the mounting groove 11 is provided with a pin hole 13;

[0040] The measuring component 2 includes: a connecting shaft 21, which is slidably disposed in the mounting groove 11 of the fan shaft 1, and a receiving groove is disposed in the connecting shaft 21;

[0041] Photoelectric sensor 22 is connected to the end of connecting shaft 21 away from mounting groove 11;

[0042] The connecting component 3 includes: a drive shaft 31, the input end of which extends outward from the receiving cavity;

[0043] The axis of the threaded rod 34 and the axis of the transmission shaft 31 are perpendicular to each other. A driving bevel gear 32 and a driven bevel gear 33 meshing with the driving bevel gear 32 are provided between the transmission shaft 31 and the threaded rod 34. The axis of the driving bevel gear 32 is connected to the output end of the transmission shaft 31, and the axis of the driven bevel gear 33 is connected to the threaded rod 34.

[0044] The extrusion tube 35 is connected to the end of the threaded rod 34 away from the drive shaft 31;

[0045] Pin 36 is disposed on the inner wall of the receiving cavity, and the axis of pin 36 is perpendicular to the axis of extrusion tube 35.

[0046] Spring 37, the fixed end of spring 37 is connected to the inner wall of the receiving cavity, and the telescopic end is connected to pin 36;

[0047] Specifically, before the outer wall of the extrusion tube 35 contacts the pin 36, the end of the pin 36 is still inside the receiving cavity, and the pin 36 is located at the lower part of the pin hole 13. After the connecting shaft 21 and the mounting groove 11 are connected, external force is applied to the transmission shaft 31. The transmission shaft 31 transmits the force to the driving bevel gear 32 and the driven bevel gear 33 in sequence. The threaded rod 34 will push the extrusion tube 35 to move closer to the pin hole 13. When the outer wall of the extrusion tube 35 contacts the end of the pin 36, the supporting force on the pin 36 causes it to move towards the pin hole 13. Finally, the pin 36 reaches the inside of the pin hole 13, connecting the fan shaft 1 and the measuring component 2.

[0048] In this embodiment, a positioning groove 12 is also provided inside the fan shaft 1. The positioning groove 12 is located on the side of the mounting groove 11 and communicates with the mounting groove 11. A positioning block 23 is provided on the shaft side of the connecting shaft 21. The positioning block 23 cooperates with the positioning groove 12.

[0049] In this embodiment, the end of the extrusion tube 35 away from the threaded rod 34 is tapered and has a threaded hole for use with the threaded rod 34;

[0050] Specifically, the end is set in a tapered shape, so that when the extrusion tube 35 and the pin 36 come into contact, the end of the pin 36 moves along the tapered surface toward the pin hole 13;

[0051] It should be noted that a limiting hole 38 is provided in the inner cavity of the extrusion tube 35, and a limiting rod 39 is slidably connected to the inner cavity of the limiting hole 38. The other end of the limiting rod 39 away from the limiting hole 38 is connected to the inner wall of the receiving cavity of the connecting shaft 21.

[0052] Specifically, the function of the limiting rod 39 is to prevent the extrusion tube 35 from rotating together with the threaded rod 34, so that it can only move along the axial direction of the limiting rod 39.

[0053] In this embodiment, the bottom of the pin 36 is integrally formed with an arc-shaped plate, which is connected to the extension end of the spring 37.

[0054] In this embodiment, the drive shaft 31 is U-shaped, and the end of the drive shaft 31 near the connecting shaft 21 is provided with an internal hexagon countersunk hole.

[0055] In this embodiment, springs 37 are fixed on both sides of the pin 36, and two sets are provided, which correspond to the pin holes 13 respectively, and the pin holes 13 are staggered vertically.

[0056] In this embodiment, the fan shaft 1 also includes a threaded fastening sleeve 14, which engages with the external thread of the connecting shaft 21 via an internal thread.

[0057] Specifically, the connecting shaft 21 and the fan shaft 1 can be initially fixed by rotating the threaded fastening sleeve 14 with an external wrench. The hexagonal nut facilitates the rotation of the threaded fastening sleeve 14, and the staggered pin holes 13 disperse the concentrated stress and improve the structural strength.

[0058] Working principle:

[0059] Insert the connecting shaft 21 into the inner cavity of the mounting groove 11 and position it using the positioning block 23 and the positioning groove 12. Then, use an external wrench to rotate the threaded fastening sleeve 14 to initially fix the connecting shaft 21 to the fan shaft 1. Next, insert the external hexagonal prism into the internal hexagonal countersunk hole. Rotating the hexagonal prism will drive the transmission shaft 31. The transmission shaft 31 drives the driving bevel gear 32 to rotate, which in turn drives the driven bevel gear 33 to rotate. The driven bevel gear 33 drives the threaded rod 34 to rotate, which in turn moves the extrusion tube 35, thus extruding... The tube 35 can press the pin 36 to move, and the pin 36 moves into the inner cavity of the pin hole 13, further strengthening the connection stability between the connecting shaft 21 and the fan shaft 1. When the fan shaft 1 moves axially, it will drive the emitting end of the photoelectric sensor 22 to move together, thereby changing the light intensity received by the receiving end of the photoelectric sensor 22. The photoelectric sensor 22 converts this change in light intensity into an electrical signal, which is then analyzed and calculated by an external controller to obtain the axial movement of the fan shaft 1, and displayed in an intuitive numerical form on the display screen.

[0060] 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 preferred examples and are not intended to limit the 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 claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An axial movement measuring mounting structure of a fan of a thermal power plant, characterized by, include: Fan shaft (1); The measuring component (2) is connected to the fan shaft (1) and has an internal receiving cavity; The connecting component (3), disposed within the receiving cavity of the measuring component (2), includes: A drive shaft (31), the input end of which extends outward from the receiving cavity; A threaded rod (34), one end of which is connected to the output end of the drive shaft (31); The extrusion tube (35) is connected to the end of the threaded rod (34) away from the drive shaft (31); A pin (36) is disposed on the inner wall of the receiving cavity, and the axis of the pin (36) is perpendicular to the axis of the extrusion tube (35); A spring (37), the fixed end of which is connected to the inner wall of the receiving cavity, and the telescopic end is connected to the pin (36); During operation, the drive shaft (31) drives the threaded rod (34) to move, and the threaded rod (34) drives the extrusion tube (35) to reciprocate in the cavity. The outer side of the extrusion tube (35) pushes the pin (36) to extend and retract out of the cavity, and the extension end is connected to the fan shaft (1).

2. The axial movement measurement mounting structure for a fan of a thermal power plant according to claim 1, characterized by, One end of the fan shaft (1) is provided with a mounting groove (11), and the inner cavity of the mounting groove (11) is provided with a pin hole (13).

3. The axial movement measurement mounting structure for a fan of a thermal power plant according to claim 2, characterized by, The measurement component (2) includes: The connecting shaft (21) is slidably disposed in the mounting groove (11) of the fan shaft (1); A photoelectric sensor (22) is connected to the end of the connecting shaft (21) away from the mounting groove (11).

4. The axial movement measurement mounting structure for a fan of a thermal power plant according to claim 3, characterized by, The fan shaft (1) also includes a threaded fastening sleeve (14), which engages with the external thread of the connecting shaft (21) through an internal thread.

5. The axial movement measurement mounting structure for a fan of a thermal power plant according to claim 4, characterized by, The fan shaft (1) is also provided with a positioning groove (12), which is located on the side of the mounting groove (11) and communicates with the mounting groove (11); a positioning block (23) is provided on the shaft side of the connecting shaft (21), and the positioning block (23) cooperates with the positioning groove (12).

6. The axial movement measurement mounting structure for a fan of a thermal power plant according to claim 5, characterized by, The axis of the drive shaft (31) is perpendicular to the axis of the threaded rod (34), and a drive bevel gear (32) and a driven bevel gear (33) meshing with the drive bevel gear (32) are provided between the drive shaft (31) and the threaded rod (34). The axis of the drive bevel gear (32) is connected to the output end of the drive shaft (31), and the axis of the driven bevel gear (33) is connected to the threaded rod (34).

7. The axial movement measurement mounting structure for a fan of a thermal power plant according to claim 6, characterized in that, The end of the extrusion tube (35) away from the threaded rod (34) is tapered and has a threaded hole for use with the threaded rod (34).

8. The axial movement measurement mounting structure for a fan of a thermal power plant according to claim 7, characterized in that, The inner cavity of the extrusion tube (35) has a limiting hole (38), and the inner cavity of the limiting hole (38) is slidably connected to a limiting rod (39). The other end of the limiting rod (39) away from the limiting hole (38) is connected to the inner wall of the receiving cavity of the connecting shaft (21).

9. The axial movement measurement and installation structure for thermal power plant fans according to claim 8, characterized in that, The bottom of the pin (36) is integrally formed with an arc-shaped plate, which is connected to the telescopic end of the spring (37).

10. The axial movement measurement mounting structure for a fan of a thermal power plant according to claim 9, characterized in that, The drive shaft (31) is U-shaped, and an internal hexagon countersunk hole is provided at the end of the drive shaft (31) near the connecting shaft (21).

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