Magnetic ring device for magnetostrictive displacement sensor

Abstract

The utility model relates to the technical field of magnetic ring devices, in particular to a magnetic ring device for a magnetostrictive displacement sensor, which is characterized in that a positioning ring is arranged on the inner ring of a bottom annular plate, a butt joint ring is arranged on the inner ring of a top annular plate, the inner side of the butt joint ring is in threaded fit with the outer side of the positioning ring, a plurality of magnet blocks are placed in an annular groove, and the magnet blocks are arranged in the annular groove. Grooves are formed in the two sides of the magnet block, protruding blocks matched with the grooves are arranged at the upper end of the bottom annular plate, the bottom annular plate and the top annular plate can be firmly in butt joint through threaded fit of the butt joint ring and the positioning ring, and the top annular plate can be installed above the bottom annular plate. At the moment, the top annular plate can provide pressure for the magnet block in the annular groove, axial movement is prevented, the stability of the magnet block after installation is further improved, uniform distribution of a magnetic field is ensured, and the detection precision of the sensor can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of wind turbine generator equipment, concretely to a magnetic ring device for magnetostrictive displacement sensor. BACKGROUND

[0002] In the hydraulic variable pitch drive type wind turbine generator, the hydraulic variable pitch cylinder bears the key task of driving the fan blade to rotate a specific angle according to the requirement. The accurate detection of the fan blade rotation angle depends on the displacement sensor installed on the hydraulic variable pitch cylinder. However, due to the continuous change of wind direction, the variable pitch cylinder acts extremely frequently, causing the displacement sensor to continuously work without interruption. After the fan runs for a certain length of time, the magnetic ring device cooperating with the sensor is easily worn out. Once the magnetic ring device is worn out, the monitoring data will deviate, ultimately negatively affecting the power generation efficiency of the wind turbine generator, and the stable and efficient operation of the wind turbine generator cannot be guaranteed. SUMMARY

[0003] (I) Technical problems solved

[0004] In view of the deficiencies in the prior art, the utility model provides a magnetic ring device for magnetostrictive displacement sensor.

[0005] (II) Technical solutions

[0006] To achieve the above purpose, the utility model provides the following technical scheme: a magnetic ring device for magnetostrictive displacement sensor, including bottom annular plate, top annular plate and multiple magnet blocks, the top annular plate is located above the bottom annular plate, and the bottom annular plate is equipped with annular groove between the top annular plate;

[0007] The inner ring of the bottom annular plate is provided with a positioning ring, and the inner ring of the top annular plate is provided with a butt joint ring, and the inner side of the butt joint ring is threadedly connected with the outer side of the positioning ring;

[0008] Multiple magnet blocks are placed inside the annular groove, and the two sides of the magnet block are provided with grooves, and the upper end of the bottom annular plate is provided with a protrusion matched with the groove;

[0009] The top annular plate and the butt joint ring are of an integral structure, and the bottom annular plate and the positioning ring are of an integral structure.

[0010] Further, the utility model improves that the grooves and the protrusions are both cylindrical structures.

[0011] Further, the utility model improves that the multiple magnet blocks are of the same size and are all arc structures.

[0012] Further, the improvement of the utility model has, the outer wall of bottom annular plate and top annular plate is equipped with antiskid line.

[0013] Further, the improvement of the utility model has, the gap filler between magnet block and annular groove adopts high temperature resistant epoxy resin glue.

[0014] Further, the improvement of the utility model has, the magnet block adopts neodymium iron boron permanent magnet, and bottom annular plate and top annular plate adopt high molecular wear-resistant material.

[0015] (Three) beneficial effects

[0016] Compared with the prior art, the utility model provides a magnetic ring device for magnetostrictive displacement sensor, has the following beneficial effects:

[0017] Through the thread cooperation of the abutment ring and the positioning ring, the bottom annular plate and the top annular plate can be firmly abutted, and the top annular plate can be installed above the bottom annular plate, at this time, the top annular plate can provide a pressure for the magnet block in the annular groove, prevent axial movement, further improve the stability of the magnet block after installation, ensure uniform distribution of magnetic field, and improve sensor detection accuracy.

[0018] When the magnet block is damaged, the top annular plate is rotated, the top annular plate is split at the top of the bottom annular plate, then the damaged magnet block is taken out in the annular groove and replaced, the split design can replace the individual magnet block without disassembling the oil cylinder, and the maintenance efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the first perspective three-dimensional structure schematic view of the utility model;

[0020] Figure 2 It is the second perspective three-dimensional structure schematic view of the utility model;

[0021] Figure 3 It is the main view of the utility model Figure 1 ;

[0022] Figure 4 It is the sectional view of the utility model;

[0023] In the drawing: 1, bottom annular plate; 2, top annular plate; 3, magnet block; 4, recess; 5, protruding block; 6, annular groove; 7, positioning ring; 8, abutment ring. DETAILED DESCRIPTION

[0024] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] Please refer to Figures 1-4 The utility model discloses a magnetostrictive displacement sensor magnetic ring device, including bottom annular plate 1, top annular plate 2 and a plurality of magnet block 3, top annular plate 2 is located the top of bottom annular plate 1, and be equipped with annular groove 6 between bottom annular plate 1 and top annular plate 2;

[0026] The inner ring of bottom annular plate 1 is equipped with positioning ring 7, the inner ring of top annular plate 2 is equipped with butt joint ring 8, and the inner side of butt joint ring 8 is in threaded cooperation with the outer side of positioning ring 7.

[0027] A plurality of magnet block 3 is placed to the inside of annular groove 6, and the both sides of magnet block 3 are equipped with recess 4, and the upper end of bottom annular plate 1 is equipped with convex block 5 that cooperates with recess 4.

[0028] Top annular plate 2 and butt joint ring 8 are integral structure, and bottom annular plate 1 and positioning ring 7 are integral structure.

[0029] Firstly, a plurality of arc-shaped structure magnet block 3 is spliced into annular groove 6, makes convex block 5 insert into recess 4, so that a plurality of magnet block 3 is installed more firmly in annular groove 6, further takes top annular plate 2, rotates top annular plate 2, can make bottom annular plate 1 and top annular plate 2 butt joint firmly through the threaded cooperation of butt joint ring 8 and positioning ring 7, can make top annular plate 2 install in the top of bottom annular plate 1, at this time, top annular plate 2 will provide a pressure for magnet block 3 in annular groove 6, prevent axial excursion, further improve the stability of magnet block 3 after installation, ensure that the magnetic field is uniformly distributed, can improve sensor detection accuracy.

[0030] When magnet block 3 is damaged, rotate top annular plate 2, make top annular plate 2 split in the top of bottom annular plate 1, then take out the damaged magnet block 3 in annular groove 6 and replace, split type design does not need to disassemble oil cylinder to replace individual magnet block 3, and the maintenance efficiency is high.

[0031] In the embodiment, recess 4 and convex block 5 are all cylindrical structures, a plurality of magnet block 3 is the same size, and is arc-shaped structure.

[0032] In the embodiment, the outer wall of the bottom annular plate 1 and the top annular plate 2 are provided with anti-skid lines, so that the top annular plate 2 and the bottom annular plate 1 are convenient to operate.

[0033] In the embodiment, the gap filler between the magnet block 3 and the annular groove 6 is high-temperature-resistant epoxy resin glue, which can enhance the vibration resistance of the structure.

[0034] In the embodiment, the magnet block 3 is a neodymium-iron-boron permanent magnet, and the bottom annular plate 1 and the top annular plate 2 are made of high-molecular wear-resistant material, such as polyether ether ketone (PEEK) or ultra-high molecular weight polyethylene (UHMWPE), which has the characteristics of light weight, impact resistance and wear resistance. A wear-resistant coating is additionally provided on the surface to prolong the service life. Compared with the traditional metal magnetic ring, the structure is more portable.

[0035] Optionally, the inner wall of the magnetic ring can be selectively provided with a guide convex strip, which cooperates with the axial groove 4 on the surface of the hydraulic oil cylinder piston rod to ensure that the magnetic ring moves linearly.

[0036] The outer wall of the magnetic ring can be selectively provided with an annular positioning groove, which cooperates with the sensor probe through an elastic clamp to prevent circumferential deviation.

[0037] In the description in the text, it should be noted that the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0038] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model.

Claims

1. A magnetic ring device for magnetostrictive displacement sensors, characterized by: Including bottom annular plate (1), top annular plate (2) and multiple magnet blocks (3), top annular plate (2) is located above bottom annular plate (1), and annular groove (6) is arranged between bottom annular plate (1) and top annular plate (2); The inner circle of bottom annular plate (1) is provided with positioning ring (7), and the inner circle of top annular plate (2) is provided with butt joint ring (8), the inner side of butt joint ring (8) is screw-threaded with the outer side of positioning ring (7); Multiple magnet blocks (3) are placed inside annular groove (6), and the two sides of magnet block (3) are provided with recess (4), and the upper end of bottom annular plate (1) is provided with convex block (5) matched with recess (4); Top annular plate (2) and butt joint ring (8) are integrated structure, and bottom annular plate (1) and positioning ring (7) are integrated structure.

2. A magnetic ring device for magnetostrictive displacement sensors according to claim 1, characterized in that: Recess (4) and convex block (5) are all cylindrical structure.

3. A magnetic ring device for magnetostrictive displacement sensors according to claim 2, characterized in that: Multiple magnet blocks (3) are same in size, and are all arc structure.

4. A magnetic ring device for magnetostrictive displacement sensors according to claim 3, characterized in that: The outer wall of bottom annular plate (1) and top annular plate (2) is all provided with anti-skid line.

5. A magnetic ring device for magnetostrictive displacement sensors according to claim 4, characterized in that: The gap between magnet block (3) and annular groove (6) is filled with high-temperature-resistant epoxy resin adhesive.

6. A magnetic ring device for magnetostrictive displacement sensors according to claim 5, characterized in that: Magnet block (3) uses neodymium-iron-boron permanent magnet, and bottom annular plate (1) and top annular plate (2) use high-molecular wear-resistant material.

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