Magnetic separator mechanism and application method thereof

Abstract

The invention belongs to the field of mechanical hydraulic pressure, and particularly discloses a magnetic separator mechanism and an application method.The magnetic separator mechanism comprises an outer cover and two magnetic separation pieces, the two magnetic separation pieces are fixed to the inner surface of the outer cover and used for distributing magnetic flux of corresponding process magnetic saturation magnetic steel, and the magnetic separation pieces are fixed to the outer cover. The distance between the two magnetic separation sheets and the corresponding process magnetic saturation magnetic steel is not larger than 1.5 times of the height of the gap, the outer cover is made of titanium alloy and used for controlling magnetic leakage, and adjusting handles are arranged on the two sides of the outer cover of the magnetic separator respectively. The application method comprises the following steps: assembling the swing motor; adjusting the height of the magnetic separator to enable the performance of the swing motor to be qualified; selecting product magnetic steel according to the height of the magnetic separator; product magnetic steel is installed to retest the performance of the swing motor, and the swing motor is subjected to high-temperature aging and high-low-temperature impact stability tests. According to the invention, frequent magnetic steel dismounting and mounting and frequent magnetizing and demagnetizing in the debugging process of the electro-hydraulic servo valve swing motor are avoided, and the debugging efficiency of the swing motor is improved.

Description

Technical Field

[0001] The invention belongs to the field of mechanical hydraulics, and in particular relates to a magnetizer mechanism, an application method and a magnetizer. Background Art

[0002] Electro-hydraulic servo valves are precision hydraulic control components, mainly used in hydraulic servo control systems and widely used in the aerospace field. With the vigorous development of aerospace, the demand for servo valves is gradually increasing, and the output efficiency of servo valves needs to be greatly improved.

[0003] During the debugging of the swing motor of the electro-hydraulic servo valve, the workload of confirming the magnetic induction strength of the magnet is relatively large. The magnet needs to be charged and demagnetized many times during the debugging process. Each magnetization requires the complete disassembly of the swing motor, which is a lot of work. Each installation of the magnet involves tightening the screws once, and each tightening of the screws causes the magnet to be squeezed once. The magnet is a hard and brittle material, and multiple squeezing may damage the magnet, posing a hidden danger to the safety of the magnet. Therefore, it is necessary to improve the debugging efficiency of the swing motor. Summary of the invention

[0004] Purpose of the present invention:

[0005] The shortcomings of the existing technology are overcome, and the frequent disassembly and assembly of the magnetic steel and frequent charging and demagnetization during the debugging of the swing motor of the electro-hydraulic servo valve are avoided, and the swing motor of the servo valve is debugged accurately and precisely, thereby improving the debugging efficiency of the swing motor. At the same time, a set of precise debugging methods is provided for electromagnetic products with air gaps that realize proportional and servo functions.

[0006] The technical solution of the present invention is as follows:

[0007] On the one hand, the present invention proposes a magnetizer mechanism, which includes an outer cover and two magnetizer plates. The two magnetizer plates are fixed on the inner surface of the outer cover. The two magnetizer plates are used to distribute the magnetic flux of the corresponding process magnetic saturation magnetic steel. The distance between the two magnetizer plates and the corresponding process magnetic saturation magnetic steel is not greater than 1.5 times the air gap height of the swing motor.

[0008] Furthermore, the outer cover material is titanium alloy for controlling magnetic leakage; the magnetic separation sheet material is selected from high magnetic permeability material 1J60 in a bright annealed state.

[0009] Furthermore, adjustment handles are respectively provided on both sides of the outer cover.

[0010] On the other hand, the present invention also provides an application method of a magnetizer mechanism, comprising the following steps:

[0011] Step S1: Assemble the parts of the swing motor and use the process magnetic saturation magnetic steel as the permanent magnet component;

[0012] Step S2: Use a magnetizer to magnetize the swing motor, adjust the position of the magnetizer, and test the swing motor performance. When it is qualified, that is, ensure that the current-force curve and current-displacement curve output by the swing motor are within the required envelope; record the distance X0 between the bottom end surface of the magnetizer and the upper surface of the swing motor base at this time;

[0013] Step S3: according to the position of the magnetizer, search the database of the correspondence between the height of the magnetizer and the magnetic induction intensity, obtain the formal magnetic steel with the corresponding magnetic induction intensity under X0, and select two formal magnetic steels with the average magnetic induction intensity of the corresponding magnetic induction intensity;

[0014] Step S4: Remove the process magnetic saturation magnetic steel, install the formal magnetic steel to the swing motor, and retest the swing motor performance. If it is unqualified, replace the formal magnetic steel with slightly higher or slightly lower magnetic induction intensity for retesting until the swing motor performance is qualified;

[0015] Step S5, subjecting the swing motor to a high temperature aging test and a high and low temperature impact test, and retesting the swing motor performance. If it is qualified, the test is completed. If it is unqualified, repeat steps S1 to S5.

[0016] Furthermore, in step S1, the assembly order of the parts of the swing motor is as follows: first assemble the gasket to the upper surface of the base, install the lower magnetizer to the upper surface of the gasket, pass the armature assembly through the center hole of the lower magnetizer, and install it on the upper surface of the base, put the center hole of the coil on the armature assembly, the lower surface of the coil contacts the upper surface of the lower magnetizer, the process magnetic saturation magnetic steel is installed on the upper surface of the lower magnetizer, and finally, install the upper magnetizer on the upper surface of the process magnetic saturation magnetic steel and fix it with screws.

[0017] Furthermore, in step S2, when testing the performance of the swing motor, the test point is set at the center position of the baffle plane of the armature assembly.

[0018] Furthermore, in step S2, the process of using a magnetizer to magnetize the swing motor is as follows: the magnetizer is gradually moved downward from the top of the swing motor toward the process magnetic saturation magnet, part of the magnetic flux of the process magnetic saturation magnet is distributed by the magnetizer, and the distance between the bottom end face of the magnetizer and the upper surface of the swing motor base is adjusted, and the current-force curve and current-displacement curve of the swing motor output are tested by installing test equipment at the test point.

[0019] Furthermore, the step S3 includes: creating a database of the correspondence between the height of the magnetizer and the magnetic induction intensity; searching for the formal magnetic steel required for the corresponding magnetic induction intensity according to the distance X0 between the end surface of the bottom surface of the magnetizer and the upper surface of the swing motor base, and selecting two formal magnetic steels whose average magnetic induction intensity is the corresponding magnetic induction intensity.

[0020] Furthermore, the method for creating a database of the correspondence between the height of the magnetizer and the magnetic induction intensity includes the following steps:

[0021] Step S31, the distance X0 between the bottom end surface of the magnetic separator and the upper surface of the swing motor base;

[0022] Step S32, using a Tesla meter to measure the magnetic induction intensity in the air gap formed by the armature assembly and the upper and lower magnetic conductors;

[0023] Step S33, remove the process magnetic saturation magnetic steel, replace it with the formal magnetic steel, and use the charging and demagnetizing machine to adjust the magnetic induction intensity of the formal magnetic steel for multiple times to ensure that the magnetic induction intensity of the air gap after replacing the formal magnetic steel is the same as the magnetic induction intensity in the air gap in step S32;

[0024] Step S34, using a Tesla meter to measure the magnetic induction intensity on the upper surface of the formal magnetic steel, and obtaining a set of relationships between X0 and the magnetic induction intensity;

[0025] Step S35, set X0 in order from large to small or from small to large; repeat steps S31 to S34 to obtain multiple groups of relationships between X0 and magnetic induction intensity, and after combining multiple groups of relationships between X0 and magnetic induction intensity, obtain a database of corresponding relationships between magnetizer height and magnetic induction intensity.

[0026] Furthermore, the step S5 includes: the temperature and time requirements of the high-temperature aging test are that the swing motor is kept warm in a high temperature environment of 250°C for 48 hours; the temperature and time requirements of the high and low temperature impact test are 200°C for 1 hour and -40°C for 1 hour as one cycle, and 5 cycles are performed, and the switching time between the high temperature of 200°C and the low temperature of -40°C is less than 3 minutes; the performance of the swing motor is retested, and if the performance of the swing motor does not meet the requirements, steps S1 to S5 are repeated.

[0027] Furthermore, the process magnetic saturation magnetic steel is used as a permanent magnetic element, and the installation arc is 1 / 2 of the installation arc of the formal magnetic steel.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) It avoids the frequent disassembly and assembly of magnetic steel and frequent charging and demagnetization during the debugging of the swing motor of the electro-hydraulic servo valve, improves the debugging efficiency of the swing motor, and is conducive to the lean and rapid production of the electro-hydraulic servo valve.

[0030] (2) The number of times the magnet is installed and the number of times the magnet is squeezed are reduced during the debugging process, thereby reducing the risk of magnet breakage and improving the reliability of the servo valve.

[0031] (3) This method does not involve demagnetization of the magnetic steel, thus avoiding damage to the armature assembly by the AC magnetic steel generated during the demagnetization process, thereby increasing the fatigue life of the servo valve armature assembly.

[0032] (4) A database establishment method is proposed to form a database that can strongly associate the difficult-to-control magnetic field strength with the relevant distance X0, and more conveniently realize the control of the magnetic steel strength. The database establishment method provides a set of precise debugging methods for electromagnetic products with air gap implementation ratio, servo and other functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a magnetic separator mechanism and application method implementation steps of the embodiment of the present invention;

[0034] Figure 2 is an assembly diagram of a swing motor according to an embodiment of the present invention;

[0035] Figure 3 is a diagram of a process magnetic saturation magnetic steel structure according to an embodiment of the present invention;

[0036] Figure 4 This is a product magnetic steel structure diagram of an embodiment of the present invention;

[0037] Figure 5 Schematic diagram of the magnetizer mechanism of the embodiment of the present invention

[0038] Figure 6 Schematic diagram of the working of the magnetic separator of the embodiment of the present invention

[0039] Figure 7 The current-displacement curve envelope of the swing motor of the embodiment of the present invention is

[0040] Figure 8 The current-force curve envelope of the swing motor of the embodiment of the present invention is

[0041] Among them, 1-base, 2-gasket, 3-armature assembly, 4-magnet, 5-upper magnetic conductor, 6-screw, 7-coil, 8-lower magnetic conductor, 9-process magnetic saturation magnet, 10-formal magnet, 11-magnetizer, 11A-outer cover, 11B-first magnetic separator, 11C second magnetic separator. DETAILED DESCRIPTION

[0042] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the present invention is described in detail below in conjunction with the drawings or specific implementation cases of the specification. It should be noted that some (but not all) of the disclosed examples are shown in the drawings. In fact, many different examples can be described and these examples should not be understood as being limited to the examples set forth herein. On the contrary, these examples are described so that the positive effects of the present invention are more reflected, and any parts not detailed in the text are regarded as known techniques or conventional technical means in the art.

[0043] Embodiment 1: In conjunction with the specification Figure 6The magnetizer mechanism or magnetizer specifically designed by the present invention comprises an outer cover 11A and two magnetizer sheets (11B, 11C). The two magnetizer sheets (11B, 11C) are bonded to the inner surface of the outer cover 11A by high-strength epoxy adhesive. The two magnetizer sheets (11B, 11C) are used to distribute the magnetic flux of the corresponding process magnetic saturation magnetic steel 9. The distance between the two magnetizer sheets (11B, 11C) and the corresponding process magnetic saturation magnetic steel 9 is not greater than 0.5 mm. The outer cover material is titanium alloy for controlling magnetic leakage. The material of the magnetizer sheets (11B, 11C) is selected from high-permeability material 1J60, which is in a bright annealed state.

[0044] During the specific implementation process, adjustment handles are respectively provided on both sides of the outer cover 11A for easy adjustment.

[0045] The present invention is based on the above-mentioned magnetizer mechanism design, further referring to the attached Figure 1 , specifically proposed an application method of the magnetizer mechanism, including the following steps:

[0046] Step S1: Assemble the parts of the swing motor, and use the process magnetic saturation magnetic steel 9 as the permanent magnet component;

[0047] Step S2: Use the magnetizer 11 to magnetize the swing motor, adjust the position of the magnetizer 11, and test the swing motor performance. When it is qualified, the current-force curve and the current-displacement curve output by the swing motor are ensured to be within the required envelope; record the distance X0 between the bottom end surface of the magnetizer 11 and the upper surface of the swing motor base 1 at this time;

[0048] Step S3: according to the position of the magnetizer 11, search the database of the correspondence between the height of the magnetizer and the magnetic induction intensity, obtain the formal magnetic steel 10 with the corresponding magnetic induction intensity under X0, and select two formal magnetic steels 10 with the average magnetic induction intensity of the corresponding magnetic induction intensity;

[0049] Step S4: Remove the process magnetic saturation magnetic steel 9, install the formal magnetic steel 10 to the swing motor, and retest the swing motor performance. If it is unqualified, replace the formal magnetic steel 10 with a slightly higher or lower magnetic induction intensity and retest until the swing motor performance is qualified;

[0050] Step S5, subjecting the swing motor to a high temperature aging test and a high and low temperature impact test, and retesting the swing motor performance. If it is qualified, the test is completed. If it is unqualified, repeat steps S1 to S5.

[0051] In the specific implementation process, in step S1 of the above application method, see the attached Figure 2The assembly order of the parts of the swing motor is as follows: first assemble the gasket 2 to the upper surface of the base 1, install the lower magnet 8 to the upper surface of the gasket 2, pass the armature assembly 3 through the center hole of the lower magnet 8, and install it on the upper surface of the base 1, put the center hole of the coil 7 on the armature assembly 3, the lower surface of the coil 7 contacts the upper surface of the lower magnet 8, and the process magnetic saturation magnetic steel 9 is installed on the upper surface of the lower magnet 8. Finally, install the upper magnet 5 on the upper surface of the process magnetic saturation magnetic steel 9 and fix it with screws 6.

[0052] In the specific implementation process, in step S2 of the above application method, when testing the performance of the swing motor, the test point is set at the center position of the baffle plane of the armature assembly 3. The center position of the baffle plane is the intersection position of the nozzle centerline and the baffle. This position value is subject to the nozzle fluid force and the swing force of the swing motor. It is the joint action point of multiple forces. The test point is selected here to more accurately guarantee the performance of the servo valve as a whole.

[0053] During the specific implementation process, in step S2 of the above-mentioned application method, the process of using the magnetizer 11 to divide the magnets of the swing motor is as follows: the magnetizer is gradually moved downward from the top of the swing motor to the process magnetic saturation magnet 9, and part of the magnetic flux of the process magnetic saturation magnet 9 is distributed by the magnetizer 11. The distance between the bottom end surface of the magnetizer 11 and the upper surface of the swing motor base 1 is adjusted, and the current-force curve and current-displacement curve output by the swing motor are tested by installing test equipment at the test point.

[0054] During the specific implementation process, step S3 of the above application method includes: creating a database of the correspondence between the height of the magnetizer and the magnetic induction intensity; searching for the formal magnetic steel 10 required for the corresponding magnetic induction intensity according to the distance X0 between the bottom end surface of the magnetizer 11 and the upper surface of the swing motor base 1, and selecting two formal magnetic steels 10 whose average magnetic induction intensity is the corresponding magnetic induction intensity.

[0055] In the application process of the present invention, the most critical thing is to create a database of the correspondence between the height of the magnetizer and the magnetic induction intensity. The specific creation method includes the following steps:

[0056] Step S31, the distance X0 between the bottom end surface of the magnetic separator 11 and the upper surface of the swing motor base 1;

[0057] Step S32, using a Tesla meter to measure the magnetic induction intensity in the air gap formed by the armature assembly 3 and the upper and lower magnetic conductors;

[0058] Step S33, remove the process magnetic saturation magnetic steel 9, replace it with the formal magnetic steel 10, and use the charging and demagnetizing machine to adjust the magnetic induction intensity of the formal magnetic steel 10 for multiple times to ensure that the magnetic induction intensity of the air gap after replacing the formal magnetic steel is the same as the magnetic induction intensity in the air gap in step S32;

[0059] Step S34, using a Tesla meter to measure the magnetic induction intensity on the upper surface of the formal magnetic steel 10, and obtaining a set of relationships between X0 and the magnetic induction intensity;

[0060] Step S35, set X0 in order from large to small or from small to large; repeat steps S31 to S34 to obtain multiple groups of relationships between X0 and magnetic induction intensity, and after combining multiple groups of relationships between X0 and magnetic induction intensity, obtain a database of corresponding relationships between magnetizer height and magnetic induction intensity.

[0061] During the specific implementation process, step S5 of the above application method includes: the temperature and time requirements of the high-temperature aging test are that the swing motor is kept warm in a high temperature environment of 250°C for 48 hours; the temperature and time requirements of the high and low temperature impact test are 200°C insulation for 1 hour and -40°C insulation for 1 hour as one cycle, and 5 cycles are performed, and the switching time between high temperature 200°C and low temperature -40°C is less than 3 minutes; re-test the performance of the swing motor. If the performance of the swing motor does not meet the requirements, repeat steps S1 to S5.

[0062] In a specific implementation case, the process magnetic saturation magnetic steel 9 is used as a permanent magnetic element, and the installation arc is 1 / 2 of the installation arc of the formal magnetic steel 10.

[0063] Servo valves are precision products. Changes in the core dimensions at the micron level will cause changes in the performance of the servo valve. The high-temperature aging test of the servo valve can increase the effective stress release in the factory. The stress release effect is best at the specified temperature and time. The high and low temperature impact test requires the product to switch between high and low temperature environments in a short time, and the parts can achieve the next step of internal stress release under extreme conditions. The performance of the valve after the high-temperature aging test and the high and low temperature impact test is relatively stable.

[0064] The above specific implementation methods or cases are only used to explain the technical solutions of the present invention, and are not intended to limit the present application. Any parts not described in detail are deemed to be conventional technical means or common knowledge in the field. It can be understood by ordinary technicians in this field that: based on the design concept of the present application, the technical solutions recorded in the aforementioned implementation methods should be adaptively modified, or some or all of the technical features therein should be replaced by equivalents. These modifications, equivalent replacements, and adaptively improved technical solutions do not depart from the technical essence of the present invention and should all be covered within the protection scope of the present application.

Claims

1. A magnetizer mechanism, characterized in that: The magnetizer mechanism includes an outer cover and two magnetizer plates, the two magnetizer plates are fixed on the inner surface of the outer cover, the two magnetizer plates are used to distribute the magnetic flux of the corresponding process magnetic saturation magnetic steel, and the distance between the two magnetizer plates and the corresponding process magnetic saturation magnetic steel is not greater than 1.5 times the air gap height of the swing motor.

2. A magnetic separator mechanism as claimed in claim 1, characterized in that: The outer cover material is titanium alloy, which is used to control magnetic leakage; the magnetic separator material is high magnetic permeability material 1J60, bright annealed state.

3. A magnetic separator mechanism according to claim 1, characterized in that: Adjustment handles are respectively arranged on both sides of the outer cover.

4. An application method of the magnetic separator mechanism according to any one of claims 1 to 3, characterized in that: The steps include: Step S1: Assemble the parts of the swing motor and use the process magnetic saturation magnetic steel as the permanent magnet component; Step S2: Use a magnetizer to magnetize the swing motor, adjust the position of the magnetizer, and test the swing motor performance. When it is qualified, that is, ensure that the current-force curve and current-displacement curve output by the swing motor are within the required envelope; record the distance X0 between the bottom end surface of the magnetizer and the upper surface of the swing motor base at this time; Step S3: according to the position of the magnetizer, search the database of the correspondence between the height of the magnetizer and the magnetic induction intensity, obtain the formal magnetic steel with the corresponding magnetic induction intensity under X0, and select two formal magnetic steels with the average magnetic induction intensity of the corresponding magnetic induction intensity; Step S4: Remove the process magnetic saturation magnetic steel, install the formal magnetic steel to the swing motor, and retest the swing motor performance. If it is unqualified, replace the formal magnetic steel with slightly higher or slightly lower magnetic induction intensity for retesting until the swing motor performance is qualified; Step S5, subjecting the swing motor to a high temperature aging test and a high and low temperature impact test, and retesting the swing motor performance. If it is qualified, the test is completed. If it is unqualified, repeat steps S1 to S5.

5. The application method of the magnetizer mechanism as claimed in claim 4, characterized in that: In step S1, the assembly order of the parts of the swing motor is as follows: first assemble the gasket to the upper surface of the base, install the lower magnetizer to the upper surface of the gasket, pass the armature assembly through the center hole of the lower magnetizer, and install it on the upper surface of the base, put the center hole of the coil on the armature assembly, the lower surface of the coil contacts the upper surface of the lower magnetizer, the process magnetic saturation magnetic steel is installed on the upper surface of the lower magnetizer, and finally, install the upper magnetizer on the upper surface of the process magnetic saturation magnetic steel and fix it with screws.

6. The application method of the magnetizer mechanism according to claim 4, characterized in that: In step S2, when testing the performance of the swing motor, the test point is set at the center position of the baffle plane of the armature assembly.

7. The application method of the magnetizer mechanism according to claim 6, characterized in that: In step S2, the process of using a magnetizer to magnetize the swing motor is as follows: the magnetizer is gradually moved downward from the top of the swing motor toward the process magnetic saturation magnet, part of the magnetic flux of the process magnetic saturation magnet is distributed by the magnetizer, and the distance between the bottom end face of the magnetizer and the upper surface of the swing motor base is adjusted. The current-force curve and current-displacement curve output by the swing motor are tested by installing test equipment at the test point.

8. The application method of the magnetizer mechanism as claimed in claim 4, characterized in that: The step S3 includes: creating a database of the correspondence between the height of the magnetizer and the magnetic induction intensity; searching for the formal magnetic steel required for the corresponding magnetic induction intensity according to the distance X0 between the bottom end surface of the magnetizer and the upper surface of the swing motor base, and selecting two formal magnetic steels whose average magnetic induction intensity is the corresponding magnetic induction intensity.

9. The application method of the magnetizer mechanism according to claim 8, characterized in that: The method for creating a database of the correspondence between the height of the magnetizer and the magnetic induction intensity comprises the following steps: Step S31, the distance X0 between the bottom end surface of the magnetic separator and the upper surface of the swing motor base; Step S32, using a Tesla meter to measure the magnetic induction intensity in the air gap formed by the armature assembly and the upper and lower magnetic conductors; Step S33, remove the process magnetic saturation magnetic steel, replace it with the formal magnetic steel, and use the charging and demagnetizing machine to adjust the magnetic induction intensity of the formal magnetic steel for multiple times to ensure that the magnetic induction intensity of the air gap after replacing the formal magnetic steel is the same as the magnetic induction intensity in the air gap in step S32; Step S34, using a Tesla meter to measure the magnetic induction intensity on the upper surface of the formal magnetic steel, and obtaining a set of relationships between X0 and the magnetic induction intensity; Step S35, set X0 in order from large to small or from small to large; repeat steps S31 to S34 to obtain multiple groups of relationships between X0 and magnetic induction intensity, and after combining multiple groups of relationships between X0 and magnetic induction intensity, obtain a database of corresponding relationships between magnetizer height and magnetic induction intensity.

10. The application method of the magnetizer mechanism according to claim 4, characterized in that: The step S5 includes: the temperature and time requirements of the high-temperature aging test are that the swing motor is kept warm in a high temperature environment of 250°C for 48 hours; the temperature and time requirements of the high and low temperature impact test are that 200°C is kept warm for 1 hour and -40°C is kept warm for 1 hour as one cycle, and 5 cycles are performed, and the switching time between the high temperature of 200°C and the low temperature of -40°C is less than 3 minutes; the performance of the swing motor is retested, and if the performance of the swing motor does not meet the requirements, steps S1 to S5 are repeated.

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