A kind of quick check tool and method for insulating performance of gyro end cover assembly

Abstract

The present application relates to a kind of quick check tool and method of insulating performance of gyro end cover assembly, solve the technical problem that the existing gyro end cover assembly test is longer and the detection efficiency is lower, or bridge piece is inconvenient to use.The present application includes long needle support body, short needle support body is set in long needle support body outside, and tool base is set in short needle support body outside, and one end surface of tool base is equipped with fastening screw;Short needle support body and long needle support body are screw connection, tool base and short needle support body are screw connection;Tool base is insulating non-metal material, short needle support body, long needle support body and fastening screw are metal material;Short needle support body and long needle support body are equipped with conductive buffer layer and adjusting recess.The present application is conducted by two adjustable support bodies, and the insulation resistance test and dielectric strength test of all insulators can be completed by once installation by the conduction of different, different height insulators.

Description

Technical Field

[0001] This invention relates to a hemispherical resonant gyroscope testing device, specifically to a tooling and method for rapidly inspecting the insulation performance of a gyroscope end cap assembly. Background Technology

[0002] The hemispherical resonant gyroscope is a new type of solid-state gyroscope characterized by high precision, high reliability, and long lifespan. Its working principle involves sensing the base rotation using the radial standing wave precession effect of the hemispherical shell lip. Because the hemispherical resonant gyroscope has no moving parts, it boasts advantages such as low internal power consumption, insensitivity to magnetic fields, and fewer potential failure factors. It exhibits high measurement accuracy, superior stability and reliability, good resistance to shock vibration, and high dynamic range with low noise.

[0003] The basic structure of a hemispherical resonant gyroscope includes a sensing component located inside the gyroscope. The excitation and detection electrodes of the sensing component need to be led out to the outside of the gyroscope through an end cap assembly; see also Figure 1 The end cap assembly includes an end cap base 01 and twenty-four insulators distributed on it. The insulators are divided into short needle insulators 02 and long needle insulators 03, each corresponding to an independent electrode point. The end cap base 01 is divided into concentric short needle insulator distribution circles Φa and long needle insulator distribution circles Φb located within them. Short needle insulators 02 and long needle insulators 03 are evenly distributed on the short needle insulator distribution circles Φa and Φb, respectively. Both the end cap base 01 and the insulators are made of metal and are connected by a glass sintering section 04. As required, each insulator must meet a certain insulation strength with the end cap base 01; therefore, insulation resistance and dielectric strength tests are necessary.

[0004] Insulation resistance testing is generally performed using an insulation resistance tester or a megohmmeter for direct measurement; dielectric strength testing is generally performed using a dielectric strength tester, applying an AC current of a certain capacity to the test terminal and maintaining the current for a certain period of time, generally not less than 1 minute, during which insulation breakdown should not occur. Insulation resistance testing must be performed again after the dielectric strength test.

[0005] Since the 24 insulators in the end cap assembly are independent of each other, each insulator and the end cap base must be tested for insulation resistance and dielectric strength individually during testing, which takes a long time and has low testing efficiency.

[0006] Chinese patent (CN211293132U) discloses a bridging component for testing the insulation performance of products. It includes an insulator and a rigid metal component that can be detachably connected to multiple ports of the product under test. The metal component has N detachable pins, allowing direct connection and disconnection between the bridging component and the product ports without the need for screwdrivers, reducing installation and removal workload. However, when applied to end cap assemblies, the pins of the bridging component must be individually connected to each product test port, and the pins and product test ports must have a high degree of compatibility. If the fit is too tight, it may damage the product during installation and removal; if the fit is too loose, it will generate significant contact resistance, affecting the test results. Summary of the Invention

[0007] The purpose of this invention is to solve the technical problems of long testing time and low detection efficiency of existing gyroscope end cap assemblies, or the inconvenience of using bridging components, and to provide a tooling and method for rapid inspection of the insulation performance of gyroscope end cap assemblies.

[0008] To achieve the above objectives, the technical solution provided by this invention is as follows:

[0009] A quick-testing fixture for the insulation performance of a gyroscope end cap assembly is provided, applicable to end cap assemblies of hemispherical resonant gyroscopes. The end cap assembly includes an end cap base, on which are divided concentric short needle insulator distribution circles Φa and long needle insulator distribution circles Φb located within them. Multiple short needle insulators and multiple long needle insulators passing through the end cap base are evenly distributed on the short needle insulator distribution circles Φa and Φb, respectively. The end cap base is connected to the short needle insulators and long needle insulators through a glass sintering section, and both are made of metal.

[0010] Its special feature is:

[0011] It includes a cylindrical long needle support, a short needle support that is annular and fitted over the long needle support, and a tooling base that is annular and fitted over the short needle support. The tooling base has at least three fastening screws on one end face for fixing the end cap assembly, and one side of the end face is defined as the top.

[0012] The diameter d2 of the long needle support body must meet the condition: Φb + r1 <d2<Φa-r2;

[0013] The outer diameter d1 of the short needle support body must meet the condition: Φa + r2 <d1<d;

[0014] Where r1 is the radius of the long needle insulator, r2 is the radius of the short needle insulator, and d is the diameter of the end cap base;

[0015] The short needle support body and the long needle support body are connected by threads, and the tooling base is connected by threads to the short needle support body;

[0016] The tooling base is made of insulating non-metallic material, while the short needle support, long needle support, and fastening screws are made of metal.

[0017] Both the short needle support and the long needle support have a conductive buffer layer on their upper surfaces, and adjustment grooves are provided on their lower surfaces. The conductive buffer layer is made of conductive rubber or conductive sponge.

[0018] It also includes a No. 1 special wrench and a No. 2 special wrench, which are used to adjust the axial position of the short needle support and the long needle support respectively through the adjustment grooves set on the lower end face of the support.

[0019] Furthermore, the lower end face of the long needle support is provided with two intersecting grooves, the intersection of which is located at the center of the lower end face; the lower end face of the short needle support is provided with four grooves, and the four grooves are radially aligned with the two intersecting grooves provided on the lower end face of the long needle support.

[0020] Furthermore, the two grooves of the long needle support are orthogonally arranged, and the four grooves of the short needle support can form a cross groove together with the two grooves of the long needle support.

[0021] Furthermore, one end face of the No. 1 special wrench is provided with four protruding keys, which respectively mate with the four grooves of the short needle support; one end face of the No. 2 special wrench is provided with a cross protruding key, which mates with the two grooves of the long needle support.

[0022] Furthermore, the conductive buffer layer thickness of the short needle support and the long needle support is greater than 2 mm.

[0023] Furthermore, there are four fastening screws, evenly distributed on the upper surface of the tooling base.

[0024] This invention also provides a method for rapid inspection of the insulation performance of a gyroscope end cap assembly, using the aforementioned fixture for rapid inspection of the insulation performance of a gyroscope end cap assembly. The method is characterized by the following steps:

[0025] S1, fixed fixture base; let h1 be the length of the short needle insulator passing through the lower end face of the end cover base, and h2 be the length of the long needle insulator passing through the lower end face of the end cover base.

[0026] S2. Adjust the axial position of the short needle support relative to the fixture base by adjusting the adjustment groove of the short needle support using a No. 1 special wrench, and meet the condition that: the distance between the upper end face of its conductive buffer layer and the upper end face of the fixture base is (h1–c) mm, where c is the abutment allowance of 0.1 mm. <c<1mm;

[0027] S3, adjust the axial position of the long needle support relative to the tooling base by adjusting the adjustment groove of the long needle support with a No. 2 special wrench, and meet the condition that the distance between the upper end face of its conductive buffer layer and the upper end face of the tooling base is (h2–c) mm.

[0028] S4, install the end cap assembly on the tooling base, with the short needle insulator abutting against the upper surface of the conductive buffer layer of the short needle support, and the long needle insulator abutting against the upper surface of the conductive buffer layer of the long needle support;

[0029] S5, Secure the end cap assembly with fastening screws;

[0030] S6, Insulation resistance test of end cap assembly;

[0031] S7, Dielectric strength test of end cap assembly;

[0032] S8, Perform a secondary insulation resistance test on the end cap assembly;

[0033] S9, Test complete. Loosen the fastening screws, remove the end cap assembly, and complete the quick check of the insulation performance of the end cap assembly to obtain the test results.

[0034] Furthermore, connect one end of the test lead of the insulation resistance tester or megohmmeter to the end of any short-needle insulator or long-needle insulator, and connect the other end of the test lead to the end of any fastening screw to perform the insulation resistance test.

[0035] Furthermore, connect one end of the test lead of the dielectric strength tester to the end of any short needle insulator or long needle insulator, and connect the other end of the test lead to the end of any fastening screw. Set the voltage, frequency, energizing time, leakage current and other parameters of the dielectric strength tester according to actual needs, and perform dielectric strength testing.

[0036] Furthermore, c = 0.5 mm.

[0037] The advantages of this invention compared to the prior art are:

[0038] 1. The present invention provides a quick inspection fixture for the insulation performance of a gyroscope end cap assembly. Based on parameters such as the distribution circle and axial height of N insulators in the end cap assembly, two height-adjustable supports (short needle support and long needle support) are designed to conduct N insulators with different distribution positions and heights. The operation is convenient, and the insulation resistance test and dielectric strength test of all insulators can be completed in one installation. The installation is convenient and the testing is convenient.

[0039] 2. The present invention provides a method for rapid inspection of the insulation performance of a gyroscope end cap assembly. Using a fixture designed according to the position of the insulators in the end cap assembly, short needle insulators and long needle insulators are supported respectively. Multiple insulators with different distribution positions and heights are connected to a single point, which can simultaneously perform insulation resistance and dielectric strength tests on all insulators. The total testing time for N insulators is reduced to 1 / N times the original time, effectively improving the detection efficiency of the end cap assembly.

[0040] 3. The present invention provides a quick inspection tooling for the insulation performance of a gyroscope end cap assembly. It uses a metal support body with an added conductive buffer layer. The elasticity of the conductive buffer layer is used to compensate for the height error of the insulator. It can connect insulators with different distribution positions and heights into a single point, effectively reducing the difficulty of adjustment.

[0041] 4. The present invention provides a quick inspection tooling for the insulation performance of a gyroscope end cap assembly. Its structure is designed based on an insulator, so it is not only suitable for the end cap assembly of a hemispherical resonator gyroscope, but can also be extended to other gyroscopes, accelerometers and other component products with insulators after adaptive adjustments. It only needs to be adjusted according to parameters such as the position and axial height of the insulator. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of the end cap assembly in an existing hemispherical resonant gyroscope, where Figure A is the front view, Figure B is the top view, and Figure C is a schematic diagram of the three-dimensional structure.

[0043] Figure 1 The symbols in the attached map are explained as follows:

[0044] 01-End cap base; 02-Short needle insulator; 03-Long needle insulator; 04-Glass sintering section.

[0045] Figure 2 This is a schematic diagram of a tooling embodiment for rapid testing of the insulation performance of a gyroscope end cap assembly according to the present invention, wherein Figure A is a sectional view, Figure B is a bottom view, Figure C is a top view, and Figure D is a half-sectional perspective view.

[0046] Figure 3 This is a schematic diagram of the structure of the No. 1 special wrench in an embodiment of the present invention;

[0047] Figure 4 This is a schematic diagram of the structure of the No. 2 special wrench in an embodiment of the present invention;

[0048] Figure 5 This is a schematic diagram of an embodiment of a method for rapid inspection of the insulation performance of a gyroscope end cap assembly according to the present invention.

[0049] Figures 2-5 The symbols in the attached map are explained as follows:

[0050] 1- Fixture base; 2- Short needle support; 3- Long needle support; 4- Fastening screw;

[0051] 5-Conductive buffer layer No. 1; 6-Conductive buffer layer No. 2; 7-Cross groove; 8-Threaded connection part. Detailed Implementation

[0052] The specific technical solutions in the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0053] This invention proposes a tooling and method for rapidly inspecting the insulation performance of gyroscope end cap assemblies. Based on the distribution position and axial height of the insulators in the end cap assembly, two height-adjustable supports are set up. A conductive buffer layer is added to the metal substrate of the supports, and the elasticity of the conductive rubber is used to compensate for the height error of the insulators. N insulators with different distribution positions and heights are connected to a single point. The operation is convenient, and the insulation resistance and dielectric strength tests of all insulators can be completed in one installation. The testing time of N insulators is reduced to 1 / N, improving the detection efficiency.

[0054] Figure 1 This is a schematic diagram of the end cap assembly in a hemispherical resonant gyroscope. The end cap assembly includes an end cap base 01, on which are divided concentric short needle insulator distribution circles Φa and long needle insulator distribution circles Φb located within them. Sixteen short needle insulators 02 and eight long needle insulators 03, passing through the end cap base 01, are evenly distributed on the short needle insulator distribution circles Φa and Φb, respectively. The end cap base 01 is connected to the short needle insulators 02 and the long needle insulators 03 via a glass sintering section 04, all of which are made of metal.

[0055] Figure 2 A quick inspection fixture for the insulation performance of a gyroscope end cap assembly provided in this embodiment of the invention includes a cylindrical long needle support 3, a short needle support 2 that is annular and sleeved outside the long needle support 3, and a fixture base 1 that is annular and sleeved outside the short needle support 2. Four evenly distributed fastening screws 4 are provided on one end face of the fixture base 1 for fixing the end cap assembly.

[0056] The diameter d2 of the long needle support 3 satisfies the condition: Φb+r1 <d2<Φa-r2;

[0057] The outer diameter d1 of the short needle support 2 satisfies the condition: Φa + r2 <d1<d;

[0058] Where r1 is the radius of the long needle insulator 03, r2 is the radius of the short needle insulator 02, and d is the diameter of the end cap base 01. The upper end face of the long needle support 3 corresponds to the position of the long needle insulator distribution circle Φb, and the upper end face of the short needle support 2 corresponds to the position of the short needle insulator distribution circle Φa.

[0059] The short needle support 2 and the long needle support 3 are connected by threads, and the tooling base 1 and the short needle support 2 are connected by threads, i.e. Figure 1 The threaded connection part 8 is in the middle; the tooling base 1 is made of insulating non-metallic material, while the short needle support 2, long needle support 3 and fastening screw 4 are made of metal.

[0060] The upper surface of the short needle support 2 is provided with a first conductive buffer layer 5 with a thickness greater than 2mm, and the upper surface of the long needle support 3 is provided with a second conductive buffer layer 6 with a thickness greater than 2mm. The lower surfaces of the short needle support 2 and the long needle support 3 are provided with cross grooves 7. Both conductive buffer layers are made of conductive rubber.

[0061] Specifically, the cross-shaped groove 7 consists of two orthogonal grooves on the lower end face of the long needle support 3, with the intersection of the two grooves located at the center of the lower end face; correspondingly, four grooves are provided on the lower end face of the short needle support 2, and these four grooves radially correspond to the two staggered grooves on the lower end face of the long needle support 3, i.e., each pair of grooves is collinear with the two grooves of the long needle support 3. The four grooves of the short needle support 2 and the two grooves of the long needle support 3 together form the cross-shaped groove.

[0062] See Figures 3-4 The present invention also provides a No. 1 special wrench and a No. 2 special wrench, which are used to adjust the axial position of the short needle support 2 and the long needle support 3 respectively through the cross groove 7; one end face of the No. 1 special wrench is provided with four protruding keys, which respectively cooperate with the four grooves of the short needle support 2; one end face of the No. 2 special wrench is provided with a cross protruding key, which cooperates with the two grooves of the long needle support 3.

[0063] refer to Figure 5 The usage method of this invention is as follows:

[0064] adjust:

[0065] S1, Fixing fixture base 1; Let h1 be the length of the short needle insulator 02 passing through the lower end face of the end cover base 01, and h2 be the length of the long needle insulator 03 passing through the lower end face of the end cover base 01.

[0066] S2, by adjusting the adjustment groove of the short needle support 2 with a No. 1 special wrench, the axial position of the short needle support 2 relative to the tooling base 1 is adjusted, and the condition is met: the distance between the upper end face of its conductive buffer layer and the upper end face of the tooling base 1 is h1–0.5mm.

[0067] S3, by adjusting the adjustment groove of the long needle support 3 with a No. 2 special wrench, the axial position of the long needle support 3 relative to the tooling base 1 is adjusted, and the condition is met: the distance between the upper end face of its conductive buffer layer and the upper end face of the tooling base 1 is h2–0.5mm.

[0068] S4, install the end cap assembly on the tooling base 1, the short needle insulator 02 abuts against the upper end face of the conductive buffer layer of the short needle support 2, and the long needle insulator 03 abuts against the upper end face of the conductive buffer layer of the long needle support 3.

[0069] S5, fasten the end cap assembly with fastening screw 4;

[0070] test:

[0071] S6. Perform an insulation resistance test on the end cap assembly. Connect one end of the test lead of the insulation resistance tester or megohmmeter to the end of any short needle insulator 02 or long needle insulator 03, and connect the other end of the test lead to the end of any fastening screw 4. Perform an insulation resistance test. The insulation resistance between the insulator and the end cap base 01 should be greater than 500MΩ.

[0072] S7. Perform a dielectric strength test on the end cap assembly. Connect one end of the test lead of the dielectric strength tester to the end of any short needle insulator 02 or long needle insulator 03, and the other end of the test lead to the end of any fastening screw 4. Set the voltage, frequency, energizing time, leakage current, and other parameters of the dielectric strength tester according to actual needs, and perform the dielectric strength test. In this embodiment, the dielectric strength tester voltage is set to 300V, the frequency to 50Hz, the waveform to be a sine wave, and the energizing time to 1 minute. Perform a dielectric strength test between the insulator and the end cap substrate 01. There should be no insulation breakdown alarm during the energizing process.

[0073] S8. Perform a secondary insulation resistance test on the end cap assembly. Connect one end of the test lead of the insulation resistance tester or megohmmeter to the end of any short needle insulator 02 or long needle insulator 03, and connect the other end of the test lead to the end of any fastening screw 4. Perform the insulation resistance test. The insulation resistance between the insulator and the end cap base 01 should be greater than 500MΩ.

[0074] S9, Test complete. Loosen fastening screw 4, remove end cap assembly, complete the quick check of the insulation performance of end cap assembly, and obtain the test results.

[0075] The above description is merely one embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any equivalent structural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A quick inspection tool for the insulation performance of a gyroscope end cap assembly, applicable to the end cap assembly of a hemispherical resonant gyroscope. The end cap assembly includes an end cap base (01), on which concentric short needle insulator distribution circles Φa and long needle insulator distribution circles Φb are divided. Multiple short needle insulators (02) and multiple long needle insulators (03) passing through the end cap base (01) are evenly distributed on the short needle insulator distribution circles Φa and long needle insulator distribution circles Φb, respectively. The end cap base (01) is connected to the short needle insulators (02) and the long needle insulators (03) through a glass sintering part (04), and all are made of metal. Its features are: It includes a cylindrical long needle support (3), a short needle support (2) sleeved on the long needle support (3) and being annular, and a tooling base (1) sleeved on the short needle support (2) and being annular. At least three fastening screws (4) are provided on one end face of the tooling base (1) for fixing the end cap assembly, and one side of the end face is defined as the top. The diameter d2 of the long needle support (3) must satisfy the condition: Φb+r1 < d2 <Φa-r2; The outer diameter d1 of the short needle support (2) must meet the condition: Φa + r2 < d1 < d; Where r1 is the radius of the long needle insulator (03), r2 is the radius of the short needle insulator (02), and d is the diameter of the end cap base (01); The short needle support (2) and the long needle support (3) are threaded together, and the tooling base (1) and the short needle support (2) are threaded together. The tooling base (1) is made of insulating non-metallic material, while the short needle support (2), long needle support (3) and fastening screw (4) are made of metallic material. The upper surfaces of both the short needle support (2) and the long needle support (3) are provided with conductive buffer layers, and the lower surfaces of both the short needle support (2) and the long needle support (3) are provided with adjustment grooves; the conductive buffer layers are made of conductive rubber or conductive sponge. It also includes a No. 1 special wrench and a No. 2 special wrench, which are used to adjust their axial positions through the adjustment grooves set on the lower end face of the short needle support (2) and the long needle support (3), respectively.

2. The fixture for rapid inspection of the insulation performance of a gyroscope end cap assembly according to claim 1, characterized in that, The adjustment grooves provided on the lower end faces of the short needle support (2) and the long needle support (3) are specifically as follows: The lower end face of the long needle support (3) is provided with two intersecting grooves, and the intersection of the two grooves is located at the center of the lower end face; the lower end face of the short needle support (2) is provided with four grooves, and the four grooves can correspond to the two intersecting grooves provided on the lower end face of the long needle support (3) in the radial direction.

3. The fixture for rapid inspection of the insulation performance of a gyroscope end cap assembly according to claim 2, characterized in that: The two grooves of the long needle support (3) are orthogonally arranged, and the four grooves of the short needle support (2) can form a cross groove (7) together with the two grooves of the long needle support (3).

4. The fixture for rapid inspection of the insulation performance of a gyroscope end cap assembly according to claim 3, characterized in that: The No. 1 special wrench has four protruding keys on one end face, which respectively cooperate with the four grooves of the short needle support (2); the No. 2 special wrench has a cross protruding key on one end face, which cooperates with the two grooves of the long needle support (3).

5. The fixture for rapid inspection of the insulation performance of a gyroscope end cap assembly according to claim 4, characterized in that: The conductive buffer layer thickness of the short needle support (2) and the long needle support (3) is greater than 2 mm.

6. The fixture for rapid inspection of the insulation performance of a gyroscope end cap assembly according to claim 1, characterized in that: There are four fastening screws (4), which are evenly distributed on the upper surface of the tooling base (1).

7. A method for rapid inspection of the insulation performance of a gyroscope end cap assembly, using the rapid inspection fixture for the insulation performance of a gyroscope end cap assembly as described in claim 1, characterized in that... Includes the following steps: S1, fix the tooling base (1); let h1 be the length of the short needle insulator (02) passing through the lower end face of the end cover base (01), and h2 be the length of the long needle insulator (03) passing through the lower end face of the end cover base (01); S2, by adjusting the adjustment groove of the short needle support (2) using the No. 1 special wrench, the axial position of the short needle support (2) relative to the tooling base (1) is adjusted, and the condition is met: the distance between the upper end face of its conductive buffer layer and the upper end face of the tooling base (1) is (h1 – c) mm, where c is the abutment allowance, 0.1 mm. <c<1mm; S3, by adjusting the adjustment groove of the long needle support (3) with the second special wrench, the axial position of the long needle support (3) relative to the tooling base (1) is adjusted, and the condition is met: the distance between the upper end face of its conductive buffer layer and the upper end face of the tooling base (1) is (h2–c)mm. S4, the end cap assembly is installed on the tooling base (1), the short needle insulator (02) abuts against the upper end face of the conductive buffer layer of the short needle support (2), and the long needle insulator (03) abuts against the upper end face of the conductive buffer layer of the long needle support (3). S5, fasten the end cap assembly by fastening screw (4); S6, Insulation resistance test of end cap assembly; S7, Dielectric strength test of end cap assembly; S8, Perform a secondary insulation resistance test on the end cap assembly; S9, test complete. Loosen the fastening screw (4), remove the end cap assembly, complete the quick check of the insulation performance of the end cap assembly, and obtain the test results.

8. A method for rapid inspection of the insulation performance of a gyroscope end cap assembly according to claim 7, characterized in that, In steps S6 and S8, the insulation resistance test specifically involves: Connect one end of the test lead of the insulation resistance tester or megohmmeter to the end of any short needle insulator (02) or long needle insulator (03), and connect the other end of the test lead to the end of any fastening screw (4) to perform the insulation resistance test.

9. A method for rapid inspection of the insulation performance of a gyroscope end cap assembly according to claim 7, characterized in that, In step S7, the dielectric strength test specifically involves: Connect one end of the test lead of the dielectric strength tester to the end of any short needle insulator (02) or long needle insulator (03), and connect the other end of the test lead to the end of any fastening screw (4). Set the voltage, frequency, energizing time and leakage current of the dielectric strength tester according to actual needs, and perform dielectric strength testing.

10. A method for rapid inspection of the insulation performance of a gyroscope end cap assembly according to claim 7, characterized in that, In steps S2 and S3: c=0.5mm.

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