High-temperature curing device for triple-redundancy LVDT (Linear Variable Differential Transformer) displacement sensor iron core assembly

Abstract

A high-temperature curing device for an iron core assembly of a triple-redundancy LVDT displacement sensor relates to the field of displacement sensor testing and comprises a frame, a supporting plate and a mounting plate, the frame comprises four cylinders and a multi-layer support arranged on the four cylinders, each layer of support comprises two adjusting rods, the four cylinders are respectively two first cylinders and two second cylinders, and the four cylinders are respectively two first cylinders and two second cylinders. The two ends of one adjusting rod are connected to the two first column bodies, and the two ends of the other adjusting rod are connected to the two second column bodies. The supporting plate and the mounting plate are mounted on the supports on different layers, and the mounting plate is located above the supporting plate. Limiting holes are formed in the mounting plate, each group of limiting holes comprises a plurality of limiting holes, the number of the limiting holes is consistent with the number of connecting rods connected with the iron core, placing holes matched with the protrusions are formed in the supporting plate, and the mounting plate comprises a fixing plate and limiting plates located on the two sides of the fixing plate. And each limiting hole is divided into two halves by a boundary between each limiting plate and the fixing plate. And the straightness of the product is ensured during high-temperature curing.

Description

Technical Field

[0001] The utility model relates to a fixing device, which is particularly suitable for high-temperature curing test of iron core components of multi-redundant LVDT displacement sensor products, and belongs to the technical field of displacement sensor testing. Background Art

[0002] The core assembly straightness requirement for triple-redundant LVDT displacement sensors is less than 0.15. According to product design specifications and process documentation, the core assembly curing test requires a 2-hour curing temperature of 180°C in a high-temperature test chamber. During displacement sensor testing, the core assembly must meet the 0.15 straightness requirement.

[0003] The current high-temperature curing method for core assemblies involves inserting the core assembly into the holes in the core support rods. This utilizes a flat-surface fixture layout, which occupies a large area. The high-temperature chamber can only accommodate three curing fixtures at a time. The core end diameter is at its maximum size, and the lateral distance cannot guarantee a proper fit for the core cap, which in turn prevents the core assembly from maintaining its straightness. Therefore, after high-temperature curing, the core assembly requires straightening, which cannot be achieved using conventional straightening rods for three cores.

[0004] The only way is to straighten the core before high-temperature curing. After determining the zero position of the multi-redundant displacement sensor, place the core assembly on a support plate that maintains verticality (the straightness reference points are guaranteed by the support plate and fixed plate of the curing device) to ensure the straightness of the core during the high-temperature curing process. Utility Model Content

[0005] The technical problem solved by the present application is: to overcome the deficiencies of the prior art and provide a fixing device for products in high temperature environments, which connects various components and provides strong guarantees for ensuring the straightness of the product when the product is cured at high temperature.

[0006] The technical solutions provided in this application are as follows:

[0007] A high-temperature curing device for a triple-redundant LVDT displacement sensor core assembly is used to support a product under test. The product under test includes an iron core and multiple connecting rods. One end of the multiple connecting rods is connected to the iron core. The end of the iron core away from the connecting rods is provided with a cylindrical protrusion. The end of the connecting rod away from the iron core is connected to an iron core cap with a diameter greater than the diameter of the iron core. The high-temperature curing device includes a frame, a support plate, and a mounting plate. The frame includes four columns and a multi-layer bracket provided on the four columns. Each layer of the bracket includes two mutually parallel adjustment rods. The four columns are two first columns and two second columns. The two ends of an adjustment rod are respectively connected to the two first columns. The two ends of the other adjusting rod are respectively connected to the two second columns; the support plate and the mounting plate for supporting the same product under test are installed on different layers of brackets, and the mounting plate is located above the support plate; two rows of limit holes are provided on the mounting plate, and each row of limit holes includes multiple groups of limit holes, and each group of limit holes includes multiple limit holes and the number of limit holes is consistent with the number of connecting rods connected to the iron core; placement holes that cooperate with the protrusions are provided on the support plate, and the placement holes correspond one-to-one to each group of limit holes; the mounting plate includes a fixed plate and limit plates located on both sides of the fixed plate, and the dividing line between each limit plate and the fixed plate passes through a row of limit holes, and the dividing line divides each limit hole into two halves.

[0008] The installation position of the adjustment rod is adjustable along the height direction of the column.

[0009] The lower surfaces of both ends of the adjusting rod are each connected to an angle iron, the column is provided with a vertical slide groove, a second nut which can only slide along the length direction of the vertical slide groove is provided in the vertical slide groove, and the second bolt passes through the angle iron and is threadedly connected to the second nut.

[0010] The frame further includes a connecting rod connected between adjacent first columns and second columns.

[0011] An installation groove is provided on the opposite side of the upper surface of the two adjustment rods of each layer of the bracket, the end of the support plate is tightly matched with the installation groove, and the end of the installation plate formed by the combination of the two limit plates and the fixed plate is tightly matched with the installation groove.

[0012] The adjusting rod is provided with a positioning block in the middle of the installation groove, and a first positioning groove is provided in the middle of both ends of the support plate, which is tightly matched with the positioning block, and a second positioning groove is provided in the middle of both ends of the fixing plate, which is matched with the positioning block.

[0013] A plurality of mounting plates are arranged along the height direction of the connecting rod.

[0014] The edges of the first positioning groove and the second positioning groove are chamfered.

[0015] The thermal expansion coefficient of the frame, support plate and mounting plate at 180° is not greater than 25-30×10 -6 / ℃.

[0016] In summary, this application has at least the following beneficial technical effects:

[0017] (1) The utility model adopts a support plate, a limit plate, and a fixed plate to increase the straightness of the product, fix the product on the frame, and realize the curing test in a high-temperature box to meet the requirements of curing in a high-temperature environment.

[0018] (2) The limit plate and the fixed plate of the present invention are divided into three parts by cutting. The middle part is tightly matched with the protrusion and the adjustment rod. The second and third parts are cut along the tangential position of the hole to expose the position where the product is placed. After placing the product, the fixed plate can be installed in place.

[0019] (3) The utility model has a frame of 300mmx400mmx600mm, and the products are placed vertically to meet the curing test of the core components of 20 products in a high temperature box.

[0020] (4) The utility model can meet the high temperature curing test requirements of products of different models and redundancy by replacing the sizes of the support plate, the limit plate and the fixed plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the overall structure of the high-temperature curing device;

[0022] Figure 2 It is a structural diagram of the mounting plate;

[0023] Figure 3 Schematic diagram of the structure of the support plate;

[0024] Figure 4 It is a structural diagram of the product under test;

[0025] Figure 5 Schematic diagram of the structure of the column, connecting rod and adjusting rod.

[0026] Explanation of the accompanying figures: 1. frame; 2. angle iron;

[0027] 3. Support plate; 31. Placement hole; 32. First positioning groove;

[0028] 4. Mounting plate; 41. Fixing plate; 411. Second positioning groove; 42. Limiting plate; 43. Limiting hole;

[0029] 6. Adjustment rod; 61. Mounting slot; 62. Positioning block;

[0030] 11. Iron core; 111. Protrusion; 12. Connecting rod; 121. Iron core cap. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments disclosed in the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] The embodiment of the present application discloses a high temperature curing device for a triple redundant LVDT displacement sensor core assembly, which is used to support a product under test. The product under test is installed in the high temperature curing device to form a whole which is placed in a high temperature oven for high temperature curing. Figure 4 As shown, the product under test is a triple-redundant displacement sensor, which includes an iron core 11 and three parallel connecting rods 12. One end of the three connecting rods 12 is connected to the iron core 11. The end of the iron core 11 away from the connecting rods 12 is provided with a cylindrical protrusion 111. The end of the connecting rod 12 away from the iron core 11 is connected to the iron core cap 121. The diameter of the iron core cap 121 is larger than the diameter of the iron core 11. Figure 1 As shown, a fixing device for a product in a high temperature environment includes a frame, a support plate 3 and a mounting plate.

[0033] like Figure 5 As shown, the frame includes four columns, connecting rods, and multi-layer brackets arranged on the four columns, each layer of brackets includes two mutually parallel adjustment rods 6, the four columns are two first columns and two second columns, the two ends of one adjustment rod 6 are respectively connected to the two first columns, and the two ends of another adjustment rod 6 are respectively connected to the two second columns, the connecting rod is connected between adjacent first columns and second columns, and the adjusting rod 6 and the connecting rod are both perpendicular to the columns. The column, adjusting rod 6 and connecting rod are all aluminum frames with sliding grooves on all four sides. The height of the adjusting rod 6 is adjusted by combining bolts and nuts with angle irons, thereby realizing arbitrary adjustment of the height of each floor; specifically, an angle iron 2 is set at each end position below each adjusting rod 6, and a first nut is provided in the horizontal sliding groove on the lower surface of the adjusting rod 6. The first nut can only move along the length direction of the horizontal sliding groove. The first bolt passes through the angle iron and is threadedly connected to the first nut; the second nut is slidably connected to the vertical sliding groove of the column, and the second bolt passes through the angle iron 2 and is threadedly connected to the second nut; when the second screw is loosened, the adjusting rod 6 and the angle iron 2 can move along the direction of the vertical sliding groove, and when the second screw is tightened, the adjusting rod 6 and the angle iron 2 are relatively fixed to the column, thereby realizing the adjustment of the height of the adjusting rod 6.

[0034] like Figure 2 and Figure 3As shown, support plates 3 and mounting plates are respectively installed on the brackets of different layers, and the support plate 3 is located below the mounting plate. A placement hole is opened on the support plate 3, and the placement hole cooperates with the protrusion 111 at the end of the iron core 11. Limiting holes corresponding to the placement holes are set on the mounting plate. The limiting holes are grouped into three, and the three limiting holes cooperate with three connecting rods 12 connected to the same iron core 11. The centers of the three limiting holes in the same group are on the same circle, and the center of the circle is coaxial with the placement hole.

[0035] An installation groove 61 is provided on the opposite side of the upper surface of the two adjustment rods 6 of each layer of the bracket. The end of the support plate 3 is tightly fitted with the installation groove 61. A positioning block 62 is provided in the middle of the installation groove 61 of the adjustment rod 6. A first positioning groove 32 is provided in the middle of both ends of the support plate 3. The first positioning groove 32 is tightly fitted with the positioning block 62 so that the support plate 3 can be accurately installed on the adjustment rod 6.

[0036] Two rows of limiting holes 43 are set on the mounting plate 4, and each row of limiting holes 43 includes multiple groups of limiting holes 43. The mounting plate includes a fixed plate 41 and two limiting plates 42 located on both sides of the fixed plate 41. The dividing line between each limiting plate 42 and the fixed plate 41 passes through a row of limiting holes, and the dividing line divides each limiting hole into two halves. A second positioning groove 411 is set in the middle of both ends of the fixed plate 41. The second positioning groove 411 cooperates with the positioning block 62 so that the fixed plate 41 can be accurately installed on the adjusting rod 6; the outer contour of the mounting plate 4 is consistent with the support plate 3, that is, the end of the mounting plate 4 formed by the combination of the two limiting plates 42 and the fixed plate 41 is tightly matched with the mounting groove.

[0037] After the bottom end of the product under test is mounted on support plate 3, the connecting rod 12 of the product under test is precisely positioned in the half-limiting holes on both sides of fixing plate 41. The limiting plates 42 on both sides are then installed. The limiting plates 42 and fixing plate 41 now accurately position the connecting rod 12, achieving accurate positioning of connecting rods 12 with smaller diameters, improving fixing stability, and enhancing the product's straightness during high-temperature curing. Multiple sets of mounting plates can be installed along the height direction of the connecting rod 12 to provide multi-point support for the connecting rod 12, further ensuring the product's straightness during high-temperature curing.

[0038] The horizontal plane adjustment of each layer of support plate 3 and mounting plate 4 is realized, and the vertical centering adjustment of each layer of support plate 3 and mounting plate 4 is realized; the placement hole 31 on the support plate 3 and the circle where the upper limit hole 43 on the mounting plate 4 are located are concentric to ensure the verticality of the product.

[0039] The limiting plate 42 and the fixing plate 41 are split into three parts in a manner of being fixed in position as a whole, so as to meet the requirement of fixing the end assembly (i.e., the core cap) of the product under test with a diameter larger than that of the middle assembly (core).

[0040] The edges of the first positioning groove 32 of the support plate 3 and the second positioning groove 411 of the fixing plate 41 are chamfered.

[0041] The thermal expansion coefficient of the frame 1, support plate 3 and mounting plate 4 at 180° is not greater than 25-30×10 -6 / ℃.

[0042] The contents not described in detail in this application specification are common knowledge to those skilled in the art.

[0043] The present application has been described in detail above with reference to specific embodiments and exemplary examples. However, these descriptions should not be construed as limiting the present application. Those skilled in the art will appreciate that, without departing from the spirit and scope of the present application, various equivalent substitutions, modifications, or improvements may be made to the technical solutions and implementations of the present application, all of which fall within the scope of the present application. The scope of protection of the present application shall be determined by the appended claims.

Claims

1. A high-temperature curing device for a triple-redundant LVDT displacement sensor core assembly, used for supporting a product to be tested, wherein the product to be tested comprises an iron core (11) and a plurality of connecting rods (12), one end of each of the connecting rods (12) being connected to the iron core (11), an end of the iron core (11) away from the connecting rods (12) being provided with a cylindrical protrusion (111), and an end of the connecting rod (12) away from the iron core (11) being connected with an iron core cap (121) having a diameter greater than that of the iron core (11), characterized in that: The invention comprises a frame (1), a support plate (3) and a mounting plate (4); the frame comprises four columns and a multi-layer bracket arranged on the four columns; each layer of the bracket comprises two mutually parallel adjustment rods (6); the four columns are respectively two first columns and two second columns; the two ends of one adjustment rod (6) are respectively connected to the two first columns, and the two ends of another adjustment rod (6) are respectively connected to the two second columns; A support plate (3) and a mounting plate (4) for supporting the same product to be tested are mounted on different layers of a bracket, wherein the mounting plate (4) is located above the support plate (3); The mounting plate (4) is provided with a plurality of groups of limiting holes (43), each group of limiting holes (43) includes a plurality of limiting holes, and the number of limiting holes included in each group of limiting holes (43) is consistent with the number of connecting rods (12) connected to the iron core (11). The support plate (3) is provided with placement holes that cooperate with the protrusions (111), and the placement holes correspond one-to-one with each group of limiting holes (43). The mounting plate (4) includes a fixing plate (41) and limiting plates (42) located on both sides of the fixing plate (41), and a dividing line between each limiting plate (42) and the fixing plate (41) divides each limiting hole into two halves.

2. The high-temperature curing device for a triple-redundant LVDT displacement sensor core assembly according to claim 1, characterized in that: The installation position of the adjustment rod (6) is adjustable along the height direction of the column.

3. The high-temperature curing device for a triple-redundant LVDT displacement sensor core assembly according to claim 2, characterized in that: The lower surfaces of both ends of the adjustment rod (6) are each connected to an angle iron (2), the column is provided with a vertical slide groove, a second nut that can only slide along the length direction of the vertical slide groove is provided in the vertical slide groove, and the second bolt passes through the angle iron (2) and is threadedly connected to the second nut.

4. The high-temperature curing device for a triple-redundant LVDT displacement sensor core assembly according to claim 1, characterized in that: The frame further includes a connecting rod connected between adjacent first columns and second columns.

5. The high-temperature curing device for a triple-redundant LVDT displacement sensor core assembly according to claim 1, characterized in that: Mounting grooves (61) are provided on opposite sides of the upper surfaces of the two adjustment rods (6) of each layer of the bracket, the end of the support plate (3) is tightly fitted with the mounting groove (61), and the end of the mounting plate (4) formed by combining the two limit plates (42) and the fixing plate (41) is tightly fitted with the mounting groove.

6. The high-temperature curing device for a triple-redundant LVDT displacement sensor core assembly according to claim 5, characterized in that: The adjusting rod (6) is provided with a positioning block (62) in the middle of the mounting groove (61); the first positioning grooves (32) are provided in the middle of both ends of the support plate (3); the first positioning grooves (32) are closely matched with the positioning block (62); the second positioning grooves (411) are provided in the middle of both ends of the fixing plate (41); the second positioning grooves (411) are matched with the positioning block (62).

7. The high-temperature curing device for a triple-redundant LVDT displacement sensor core assembly according to claim 1, characterized in that: A plurality of mounting plates are arranged along the height direction of the connecting rod (12).

8. The high-temperature curing device for a triple-redundant LVDT displacement sensor core assembly according to claim 1, characterized in that: The edges of the first positioning groove (32) and the second positioning groove (411) are chamfered.

9. The high-temperature curing device for a triple-redundant LVDT displacement sensor core assembly according to claim 1, characterized in that: The thermal expansion coefficient of the frame (1), the support plate (3) and the mounting plate (4) at 180° is not greater than 25-30×10 -6 / ℃.

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