Fixing support of large axial flow pump shaft throw measuring element
By designing a fixed bracket and fine-tuning system for large axial flow pumps, the problem of difficulty in achieving accurate detection of shaft swing degree measurement of large axial flow pumps is solved, and high-precision shaft swing degree detection is achieved, which is suitable for online use of large water pumps monitor.
Patent Information
- Application Number
- CN202420047199.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-09
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-01-09
AI Technical Summary
It is difficult to accurately detect the shaft swing degree measurement of large axial flow pumps, especially when the large shaft of the water pump is a large-volume structure and is difficult to carry, and it is impossible to perform on-site calibration, which affects the accuracy of the detection results.
A fixed bracket for a large axial flow pump shaft swing measurement element is designed, including an L-shaped plate-shaped cantilever, an F-shaped plate-shaped fixture, a slide rail, a slider, a spiral micrometer and an eddy current displacement sensor, through which the cantilever is Fixed to the wall, use a spiral micrometer to fine-tune the sensor to ensure detection accuracy.
It effectively reduces the impact of pump vibration on the cantilever, improves the measurement accuracy of the eddy current displacement sensor, ensures accurate detection of shaft swing, and is suitable for online monitoring of large water pumps.
Smart Images
Figure CN222436618U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of detection devices, and in particular relates to a fixing bracket of a shaft swing measuring element of a large axial flow pump. Background Art
[0002] Rotating machinery is an important component of industrial equipment and is usually composed of support, bearing and rotor systems. The efficient and safe operation of industrial equipment such as generators, steam turbines, gas turbines and water pumps depends on the correct operation of the rotating machinery system.
[0003] However, the failure of rotating machinery may cause serious damage, resulting in equipment performance degradation or even catastrophic failure. By real-time monitoring of rotating machinery and equipment, faults can be discovered in advance and handled in a timely manner, thereby reducing the possibility of accidents and reducing the cost of regular inspections and maintenance; it can effectively improve the working efficiency and operating stability of rotating machinery and reduce economic losses and safety risks caused by failures. Therefore, in order to ensure the safe, stable and efficient operation of rotating machinery, online monitoring and fault diagnosis of rotating machinery has important scientific significance and practical value.
[0004] The sensor characteristics are related to the conductivity and magnetic permeability of the object being measured. When the object being measured is a magnetic conductive material (such as ordinary steel, structural steel, etc.), due to the simultaneous existence of magnetic effect and eddy current effect, and the magnetic effect is opposite to the eddy current effect, in order to offset part of the eddy current effect, the sensor should have low sensitivity; when the object being measured is a non-magnetic or weakly magnetic conductive material (such as copper, aluminum, alloy steel, etc.), due to the weak magnetic effect, the eddy current effect is relatively strong, so the sensor sensitivity is high. Usually, before leaving the factory, the sensor system is calibrated with 45# steel material specimens. Only the material of the object being measured in the same series can produce characteristic equations similar to those of 45# steel. When the material of the object being measured is very different from the composition of 45# steel, the detection distance, sensitivity and nonlinearity of the sensor will have large deviations, and the sensor must be recalibrated according to the actual material.
[0005] However, the main shafts of water pumps are large in size and difficult to carry. The sensors cannot be recalibrated on site according to the actual materials, and the calibration operation is inconvenient, which affects the accuracy of the test results.
[0006] In order to solve the above problems, the present application proposes a fixing bracket for a shaft swing measuring element of a large axial flow pump. Utility Model Content
[0007] To solve the problems raised in the above background technology, the utility model provides a fixing bracket for a large axial flow pump shaft swing measuring element, which is easy to install the detection probe, can accurately adjust and calibrate the detection probe, and avoid vibration interference during equipment operation.
[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fixing bracket for a large axial flow pump shaft swing measuring element, comprising an L-shaped plate-like cantilever, a mounting hole is provided on the side of the cantilever, the cantilever is fixed to a cement wall through the mounting hole and bolts, a fixing bracket with an F-shaped plate-like structure is fixed to the surface of the cantilever, a slide rail is fixed to the surface of the fixing bracket, a slider is slidably connected to the surface of the slide rail, a screw micrometer is fixed to one side of the fixing bracket, the output end of the screw micrometer passes through the outer wall of the fixing bracket and is fixedly connected to the slider, a mounting bracket is fixed to the top surface of the slider by screws, a groove is provided on the surface of the mounting bracket, an eddy current displacement sensor is clamped in the groove of the mounting bracket, the output end of the eddy current displacement sensor is arranged corresponding to the pump shaft, and the eddy current displacement sensor is connected to an analyzer through a cable.
[0009] As a preferred fixing bracket of a large axial flow pump shaft swing measuring element of the utility model, a triangular plate-shaped reinforcing plate is formed on the corner side of the cantilever.
[0010] As a preferred fixing bracket of a large axial flow pump shaft swing measuring element of the utility model, one end of the cantilever extending out of the wall is fixed with a bonding plate, and the inner side wall of the bonding plate is embedded with a rotating steel ball.
[0011] As a preferred fixed bracket of a large axial flow pump shaft swing measuring element of the utility model, the slide rail is an I-shaped structure, and the sliding block matches the slide rail.
[0012] As a preferred fixing bracket of a large axial flow pump shaft swing measuring element of the utility model, an anti-skid groove is provided on the surface of the mounting bracket near the groove, and a gasket engaging with the anti-skid groove is provided at a position of the eddy current displacement sensor near the anti-skid groove.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] The cantilever of the utility model is fixed on the wall outside the pump machine. When the pump machine is running, the influence of the vibration generated by the pump machine on the cantilever can be greatly reduced, so as to avoid the influence of the vibration of the cantilever on the measurement accuracy of the eddy current displacement sensor. The eddy current displacement sensor of the utility model can be fine-tuned by a screw micrometer. During installation, the output shaft of the pump machine is installed on the bonding plate, and the eddy current displacement sensor is close to the flange of the output shaft. When the pump machine is working, the eddy current displacement sensor detects the axial degree of the output shaft in real time, and transmits the data to the analyzer, so that the detection personnel can judge the operation condition of the output shaft. By rotating the screw micrometer, the extended end of the screw micrometer pushes the slider, thereby driving the mounting frame and the eddy current displacement sensor to be fine-tuned. The screw micrometer has high accuracy. During fine-tuning, the eddy current displacement sensor can be in a more accurate position, thereby improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0016] Figure 1 It is a structural schematic diagram of the utility model;
[0017] Figure 2 It is a schematic diagram of the right side structure of the utility model;
[0018] Figure 3 It is a schematic diagram of the left structure of the utility model;
[0019] Figure 4 It is a structural schematic diagram of the fixing frame in the utility model;
[0020] In the figure: 1. cantilever; 2. reinforcement plate; 3. bonding plate; 4. fixing frame; 5. slide rail; 6. slider; 7. screw micrometer; 8. mounting frame; 9. eddy current displacement sensor; 11. mounting hole; 81. anti-slip groove. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] Example 1
[0023] Failures in rotating machinery may cause serious damage, resulting in decreased equipment performance or even catastrophic failures. By real-time monitoring of rotating machinery, faults can be discovered in advance and handled in a timely manner, thereby reducing the possibility of accidents and the cost of regular inspections and maintenance. This can effectively improve the working efficiency and operational stability of rotating machinery and reduce economic losses and safety risks caused by failures. Therefore, research on fault diagnosis of rotating machinery has important application value in the field of rotating machinery maintenance and management.
[0024] Due to the large-scale water pump and large-scale water pump unit, the spatial structure size is large, and the sensor is generally installed on the outer wall of the stuffing box of the water pump through a bracket. When the water pump is running, the stuffing box will vibrate with the water pump, which will inevitably cause the bracket and the measuring equipment connected to the bracket to shake. If the position of the measuring equipment cannot be fixed, it will inevitably affect the accuracy of the measurement, and thus the swing value of the axis of the water pump unit cannot be accurately measured. In addition, the sensor needs to be calibrated according to the actual detection situation during installation. The large shaft of the water pump is a large-volume structure, which is difficult to carry, and the sensor cannot be recalibrated according to the actual material on site;
[0025] It is particularly important to calibrate the sensor according to the material characteristics of the rotating parts, the design range of the sensor, the actual installation characteristics and output characteristics of the comprehensive sensor, and compensate the sensor measurement value when necessary to ensure that the difference between the sensor measurement value and the true value is minimized and that the true measurement value can be reflected. To solve the above problems, the present application proposes a fixed bracket for a large axial flow pump shaft swing measuring element.
[0026] Combining the above:
[0027] like Figures 1 to 4 As shown;
[0028] A fixing bracket for a large axial flow pump shaft swing measuring element comprises an L-shaped plate-like cantilever 1, a mounting hole 11 is provided on the side of the cantilever 1, the cantilever 1 is fixed to a cement wall through the mounting hole 11 and bolts, a fixing bracket 4 with an F-shaped plate-like structure is fixed to the surface of the cantilever 1, a slide rail 5 is fixed to the surface of the fixing bracket 4, a slider 6 is slidably connected to the surface of the slide rail 5, a screw micrometer 7 is fixed to one side of the fixing bracket 4, an output end of the screw micrometer 7 passes through the outer wall of the fixing bracket 4 and is fixedly connected to the slider 6, a mounting bracket 8 is fixed to the top surface of the slider 6 by screws, a groove is provided on the surface of the mounting bracket 8, an eddy current displacement sensor 9 is clamped in the groove of the mounting bracket 8, the output end of the eddy current displacement sensor 9 is arranged corresponding to the pump shaft, and the eddy current displacement sensor 9 is connected to an analyzer through a cable.
[0029] In this embodiment: the cantilever 1 of the utility model is fixed on the wall outside the pump machine. When the pump machine is running, the influence of the vibration generated by the pump machine on the cantilever 1 can be greatly reduced, so as to avoid the vibration of the cantilever 1 affecting the measurement accuracy of the eddy current displacement sensor 9. The eddy current displacement sensor 9 of the utility model can be fine-tuned by the spiral micrometer 7. The eddy current displacement sensor 9 is close to the flange of the output shaft. When the pump machine is working, the eddy current displacement sensor 9 detects the axial degree of the output shaft in real time and transmits the data to the analyzer, so that the detection personnel can judge the operation condition of the output shaft. By rotating the spiral micrometer 7, the extended end of the spiral micrometer 7 pushes the slider 6, and the slider 6 slides along the slide rail 5, thereby driving the mounting frame 8 and the eddy current displacement sensor 9 to be fine-tuned. The spiral micrometer 7 has high accuracy. During fine-tuning, the eddy current displacement sensor 9 can be in a more precise position, thereby improving the detection accuracy.
[0030] Going further:
[0031] In an optional embodiment, a triangular reinforcing plate 2 is formed on the corner side of the cantilever 1 .
[0032] In this embodiment: through this design, the reinforcing plate 2 can make the cantilever 1 have higher strength and prevent vibration from affecting the cantilever 1, thereby reducing interference during detection by the eddy current displacement sensor 9 and improving the detection accuracy of the eddy current displacement sensor 9.
[0033] Going further:
[0034] In an optional embodiment, a bonding plate 3 is fixed to one end of the cantilever 1 extending out of the wall, and a rotating steel ball is embedded in the inner wall of the bonding plate 3 .
[0035] In this embodiment: through this design, the output shaft of the pump is installed on the bonding plate 3, and the bonding plate 3 is arranged concentrically with the output shaft, so as to ensure that when the eddy current displacement sensor 9 detects the output shaft, it is on the diameter of the output shaft, thereby improving the detection accuracy. The output shaft is bonded with the steel ball, and the steel ball can reduce the friction between the output shaft and the bonding plate 3.
[0036] Going further:
[0037] In an optional embodiment, the slide rail 5 is an I-shaped structure, and the slider 6 matches the slide rail 5 .
[0038] In this embodiment: through this design, the slide rail 5 and the slider 6 fit tightly, so that the slider 6 is stable when sliding and prevents the slider 6 from separating from the slide rail 5. The slide rail 5 in the utility model is fixed in the fixing frame 4 by screws, which is convenient for assembly when the utility model is installed.
[0039] Going further:
[0040] In an optional embodiment, an anti-skid groove 81 is provided on the surface of the mounting frame 8 near the groove, and a gasket meshing with the anti-skid groove 81 is provided on the eddy current displacement sensor 9 near the anti-skid groove 81 .
[0041] In this embodiment: through this design, the gasket is sleeved on the eddy current displacement sensor 9, and the two gaskets can be clamped on the surface of the mounting frame 8 through the nut on the eddy current displacement sensor 9. The gasket and the anti-slip groove 81 are engaged with each other, which makes it difficult for the eddy current displacement sensor 9 to move up and down, thereby improving the firmness of the installation of the eddy current displacement sensor 9.
[0042] Working principle and use process of the utility model: the cantilever 1 of the utility model is fixed on the wall outside the pump machine. When the pump machine is running, the influence of the vibration generated by the pump machine on the cantilever 1 can be greatly reduced, so as to avoid the vibration of the cantilever 1 affecting the measurement accuracy of the eddy current displacement sensor 9. The eddy current displacement sensor 9 of the utility model can be fine-tuned by a screw micrometer 7. The eddy current displacement sensor 9 is close to the flange of the output shaft. When the pump machine is working, the output shaft of the pump machine is set at the bonding plate 3, and the bonding plate 3 is concentrically set with the output shaft, so as to ensure that when the eddy current displacement sensor 9 detects the output shaft, On the diameter of the output shaft, the detection accuracy is improved. The output shaft is fitted with a steel ball, which can reduce the friction between the output shaft and the fitting plate 3. The eddy current displacement sensor 9 detects the axiality of the output shaft in real time and transmits the data to the analyzer, which is convenient for the detection personnel to judge the operation of the output shaft. By rotating the screw micrometer 7, the extended end of the screw micrometer 7 pushes the slider 6, and the slider 6 slides along the slide rail 5, thereby driving the mounting frame 8 and the eddy current displacement sensor 9 to perform fine-tuning. The screw micrometer 7 has a high accuracy. During fine-tuning, the eddy current displacement sensor 9 can be in a more accurate position, thereby improving the detection accuracy.
[0043] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A fixing bracket for a large axial flow pump shaft swing measuring element, characterized in that: The invention comprises an L-shaped plate-shaped cantilever (1), a mounting hole (11) is provided on the side of the cantilever (1), the cantilever (1) is fixed to a cement wall through the mounting hole (11) and bolts, a fixing frame (4) with an F-shaped plate-shaped structure is fixed on the surface of the cantilever (1), a slide rail (5) is fixed on the surface of the fixing frame (4), a sliding block (6) is slidably connected to the surface of the sliding rail (5), a screw micrometer (7) is fixed on one side of the fixing frame (4), an output end of the screw micrometer (7) passes through the outer wall of the fixing frame (4) and is fixedly connected to the sliding block (6), a mounting frame (8) is fixed on the top surface of the sliding block (6) through screws, a groove is provided on the surface of the mounting frame (8), an eddy current displacement sensor (9) is clamped in the groove of the mounting frame (8), the output end of the eddy current displacement sensor (9) is arranged corresponding to the pump shaft, and the eddy current displacement sensor (9) is connected to an analyzer through a cable.
2. The fixing bracket of the large axial flow pump shaft swing measuring element according to claim 1 is characterized in that: A triangular reinforcing plate (2) is formed on the corner side of the cantilever (1).
3. The fixing bracket of the large axial flow pump shaft swing measuring element according to claim 1 is characterized in that: A bonding plate (3) is fixed to one end of the cantilever (1) extending out of the wall, and a rotating steel ball is embedded in the inner side wall of the bonding plate (3).
4. The fixing bracket of the large axial flow pump shaft swing measuring element according to claim 1 is characterized in that: The slide rail (5) is an I-shaped structure, and the sliding block (6) matches the slide rail (5).
5. The fixing bracket of the large axial flow pump shaft swing measuring element according to claim 1 is characterized in that: An anti-skid groove (81) is provided on the surface of the mounting frame (8) near the groove, and a gasket meshing with the anti-skid groove (81) is provided on the eddy current displacement sensor (9) near the anti-skid groove (81).