Positioning device for magnetic induction intensity test probe of Hall electric thruster

Abstract

The utility model discloses a positioning device for a Hall electric thruster magnetic induction intensity test probe, which comprises a positioning main body, a fixed clamping block assembly and a measurement positioning plug block, the fixed clamping block assembly comprises a fixed main body and a sliding clamping block, the fixed main body is arranged on the front end surface of the positioning main body, and the sliding clamping block is arranged on the front end surface of the positioning main body. The fixing body is provided with a movable sliding groove and a sliding clamping block, one end of the sliding clamping block is connected with the movable sliding groove through a spring, a plurality of positioning holes are formed in the front end face of the positioning body, the positioning holes and the fixing body are arranged in a staggered mode, and measurement positioning plug blocks are installed in the positioning holes. According to the utility model, the device and a product are fixed through the device fixing fixture block, the measurement positioning plug blocks of the rectangular holes with different thicknesses and depths are embedded into the positioning holes of the positioning main body to determine the test points of different axial positions of the fixed radial positions, and the magnetic field intensity measurement handheld gauss meter probe goes deep into the rectangular holes. The magnetic field intensity of a specific position can be obtained, and the uniformity of circumferential magnetic field intensity distribution can be obtained.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the related technical field of space magnetic field intensity measurement, and concretely relates to a positioning device for a Hall electric thruster magnetic induction intensity test probe. BACKGROUND

[0002] Hall electric propulsion is one of the mainstream directions of the development of electric propulsion technology, and is widely used as a power device for space spacecraft to provide power for spacecraft orbit transfer, position keeping and the like. The Hall thruster is a key functional component of the Hall propulsion system, and mainly constructs a radial magnetic field in the annular discharge chamber channel through an electromagnetic coil, which works together with an axial electric field to ionize and accelerate central gas to be sprayed to form thrust.

[0003] The magnetic field intensity in the discharge chamber is a key design parameter of the Hall thruster, and has a relatively important influence on the thruster performance and working stability, and therefore the magnetic field intensity measurement of the characteristic points in the discharge chamber channel after the thruster is assembled is a key step. There is no specific positioning point in the discharge chamber for the precise positioning and measurement of the handheld gauss meter probe for the magnetic field intensity measurement, and the equipment capable of precisely testing the three-dimensional magnetic field distribution in the discharge chamber channel is limited in use due to a huge volume. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art, and provide a positioning device for a Hall electric thruster magnetic induction intensity test probe. To solve the above technical problem, the basic concept of the technical scheme of the utility model is as follows:

[0005] The positioning device for the Hall electric thruster magnetic induction intensity test probe comprises a positioning main body, a fixed clamping block assembly and a measurement positioning plug, the fixed clamping block assembly comprises a fixed main body and a sliding clamping block, the fixed main body is arranged on the front end face of the positioning main body, the fixed main body is provided with a moving sliding groove and is provided with the sliding clamping block, one end of the sliding clamping block is connected with the moving sliding groove through a spring, a plurality of positioning holes are arranged on the front end face of the positioning main body, the positioning holes are arranged staggeredly with the fixed main body, the measurement positioning plug is installed in the positioning hole, and a rectangular hole for positioning the probe of the handheld gauss meter is arranged at the center position of the measurement positioning plug. The rectangular hole of the measurement positioning plug is used for the precise positioning of the handheld gauss meter probe for the magnetic field intensity measurement, and the handheld gauss meter can be selected from commonly used models on the market, such as the handheld gauss meter G100 of the German KORAD company and the TX-16 handheld gauss meter / Tesla meter of the Beijing Cuihaigaicheng Magnetoelectric Technology Co., Ltd.

[0006] Further, the fixed body is a cross structure, each cross side arm of the fixed body is provided with a moving sliding groove and is provided with a sliding clamping block, the sliding clamping block is an L-shaped structure, one arm of the sliding clamping block is located outside the moving sliding groove, the other arm is in sliding connection with the moving sliding groove, and one end of the arm is connected with the moving sliding groove through a spring. The sliding clamping block slides in the linear direction of the moving sliding groove.

[0007] Further, the positioning body and the fixed body are an integral structure, and the moving sliding groove is provided with a sliding groove cover at the front end.

[0008] Further, the positioning body is an annular columnar body, and the positioning holes and the fixed clamping block assembly are uniformly distributed with the center of the annular columnar body of the positioning body as a reference.

[0009] Further, the positioning hole is a waist-shaped hole, and the measuring positioning plug is a waist-shaped columnar body matched with the positioning hole.

[0010] Further, the measuring positioning plug is provided with different heights and rectangular hole depths according to different specific axial positions, and the rectangular hole in the center of the measuring positioning plug can be set according to a specific handheld gauss meter probe, so that the tolerance is not too large, and accurate positioning is facilitated.

[0011] The positioning body of the utility model can be placed on a measured product, the device and the product are fixed through the device fixed clamping block, the test points of different axial positions of the fixed radial position are determined after the measuring positioning plug with different thicknesses and different depth rectangular holes is embedded into the positioning hole of the positioning body, the magnetic field intensity measuring handheld gauss meter probe is deeply inserted into the rectangular hole, the magnetic field intensity of a specific position can be obtained, and the uniformity of the circumferential magnetic field intensity distribution is obtained.

[0012] The utility model discloses a positioning body test point radial basic size and depth, further control the tolerance through the measuring positioning plug, accurately position the handheld gauss meter probe placement position, improve the magnetic induction intensity test precision, the device makes the magnetic induction intensity test more flexible, fast, easy, does not receive the site and the scene limit, facilitates the cooperation magnetic field intensity measuring handheld gauss meter probe use, and the positioning is accurate, can be used for product process assembly, vacuum cabin installation test and a plurality of scenes, portable and easy to operate. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is the structural schematic diagram of the utility model;

[0014] Fig. 2 It is the top view of the utility model;

[0015] Fig. 3 It is the section view of the measuring positioning plug and the positioning body cooperation of the utility model;

[0016] Fig. 4The utility model discloses a slidable clamping block and the sectional view of the cooperation of positioning main body.

[0017] In the figure: 1, positioning main body;2, fixed clamping block assembly;3, fixed main body;4, sliding clamping block;5, measurement positioning plug;6, positioning hole;7, moving sliding slot;8, rectangular hole;9, spring. DETAILED DESCRIPTION

[0018] As Figs. 1 to 4 Shown, for hall electric thruster magnetic induction intensity test probe's positioning device, including positioning main body 1, fixed clamping block assembly 2 and measurement positioning plug 5, fixed clamping block assembly 2 includes fixed main body 3 and sliding clamping block 4, positioning main body 1 front end face is provided with fixed main body 3, and fixed main body 3 is provided with moving sliding slot 7 and is equipped with sliding clamping block 4, and one end of sliding clamping block 4 is connected with moving sliding slot 7 through spring 9, and the front end face of positioning main body 1 is provided with a plurality of positioning holes 6, and the positioning hole 6 is staggered with fixed main body 3, and the measurement positioning plug 5 is installed in the positioning hole 6, and the rectangular hole 8 for the positioning of the probe of hand-held gauss meter is arranged at the center position of the measurement positioning plug 5, and the rectangular hole 8 of the measurement positioning plug 5 is used for the accurate positioning of the probe of hand-held gauss meter for magnetic field intensity measurement.

[0019] Among them, fixed main body 3 is cross structure, and each cross side arm of fixed main body 3 is provided with moving sliding slot 7 and is equipped with sliding clamping block 4, and sliding clamping block 4 is L-shaped structure, and one arm of sliding clamping block 4 is located outside moving sliding slot 7, forms clamping jaw, and the side close to fixed main body 3 of clamping jaw is provided with rubber pad, and the other arm is slidably connected with moving sliding slot 7, and one end of the arm is connected with moving sliding slot 7 through spring 9.Sliding clamping block 4 slides in the linear direction of moving sliding slot 7.

[0020] Positioning main body 1 and fixed main body 3 are integrated structure, and moving sliding slot 7 front end has sliding slot cover.

[0021] Among them, positioning main body 1 is annular columnar body, and positioning hole 6, fixed clamping block assembly 2 are evenly distributed with the annular columnar body center of positioning main body 1 as reference.

[0022] Among them, positioning hole 6 is waist-shaped hole, and measurement positioning plug 5 is waist-shaped columnar body matched with positioning hole 6, positioning hole 6 is through hole, and rectangular hole 8 is through hole or blind hole.

[0023] Among them, measurement positioning plug 5 is provided with different height and rectangular hole depth according to the different measurement specific axial position, and the rectangular hole 8 in the center of measurement positioning plug 5 can be set according to the specific probe of hand-held gauss meter, and the matching tolerance is not easy to be too large, so as to accurately position.

[0024] The working principle of the utility model discloses is: the setting of fixed clamping block assembly 2 is mainly used for realizing cooperation and fixing with products of different sizes, the measuring and positioning plug block 5 has multiple different height size specifications, different measuring and positioning plug block centers are provided with different depth rectangular holes 8, handheld gauss meter can be inserted, and the magnetic field intensity of fixed position is measured.

[0025] Through the implementation of the above technical scheme, the magnetic field intensity of a specific position of a measured space based on a column coordinate can be measured simply and without being limited by a site, and the application is mainly described by taking a Hall thruster as an example. Generally, the discharge chamber channel of the Hall thruster is an axisymmetric structure, and an almost radial magnetic field is formed in the discharge chamber channel by an inner and outer magnetic coil or a permanent magnet. Generally, the maximum magnetic field intensity on the center line of the annular discharge chamber channel is taken as a characteristic value of design. Therefore, when the characteristic value is measured, the magnetic field intensity of a specific depth (or a plurality of depths) on the center cylindrical section of the annular discharge chamber needs to be tested.

[0026] The positioning main body 1 is placed into the discharge chamber channel of the Hall thruster, the bottom annular end surface is in contact with the end surface of the Hall thruster and is placed flat, the positioning main body 1 is assembled based on the discharge chamber of the measured product to realize the first step of preliminary positioning. Therefore, the positioning main body can determine the inner diameter, the outer diameter and the tolerance of the annular columnar body according to different models of the measured product. When the fixed clamping block assembly 2 is not installed, it is in a natural state, and one pair of the fixed clamping block assemblies 2 are distributed at 180°. The linear distance between the clamping claws of the pair of sliding clamping blocks 4 is less than the envelope size of the measured product. One of the sliding clamping blocks 4 is pulled, and the measured product is clamped naturally by the force of the spring 9. Another pair of the fixed clamping block assemblies 2 are clamped to the product by the same method, and the positioning clamping blocks are adjusted appropriately to ensure that the end surface of the positioning device based on the column coordinate magnetic induction intensity measurement is in close contact with and placed flat on the Hall thruster.

[0027] The side of the clamping claw in contact with the product is provided with a rubber pad to prevent scratching the product. The design of the sliding clamping block 4 makes the device not only suitable for cylindrical envelope products, but also suitable for irregular axisymmetric shapes and non-axisymmetric shape products. All the measuring and positioning plug blocks (the number can be set according to actual needs, and four are taken as an example here) of the same size are placed in the positioning hole 6 to ensure that the measuring and positioning plug block touches the bottom. The center line of the four circumferentially uniformly distributed waist-shaped positioning holes 6 of the positioning main body 1 is tangent to the reference circle thereof, so that the test surface of the handheld gauss meter probe is perpendicular to the radial direction of the product. The positioning hole 6 is provided as a through hole, which can allow the magnetic field intensity of any depth measuring point on the cylindrical surface to be measured. The depth of the measuring point is adjusted by the measuring and positioning plug blocks of different sizes. The radial position of the test point can be changed by changing the basic size of the reference circle diameter of the four positioning holes 6. The height of the measuring and positioning plug block is set to be able to only constrain the handheld gauss meter probe test point, and does not need to be as deep as the positioning hole 6. The handheld gauss meter probe measuring point is accurately positioned, and the processability of the device is improved.

[0028] In the embodiment, different measurement positioning plug heights can be set according to depths of points to be tested, and the rectangular hole 8 in the center of the measurement positioning plug for positioning the handheld gauss meter probe can be a through hole or a blind hole, so as to change the depth of the measurement point on each measurement point on the same circumference;

[0029] After the static magnetic field of the Hall thruster is constructed, the handheld gauss meter probe is inserted into the test hole in sequence to obtain the magnetic field intensity of the measurement point at the same depth and different angles on the same circumference, and the test result can measure the magnetic field circumferential uniformity of the product;

[0030] When the magnetic field intensity and uniformity at another depth need to be measured, another four measurement positioning plugs of the same size corresponding to the depth are replaced and inserted into the handheld gauss meter probe in sequence, the handheld gauss meter is uniformly attached to the outside of the rectangular hole 8 limiting the probe, the influence of the fitting error is eliminated as much as possible, and the test precision is improved;

[0031] The positioning main body can be placed on the product to be measured, the device and the product are fixed through the device fixing clamping block, the test points of different radial positions and axial positions are determined after the measurement positioning plug 5 of different thicknesses and different depths rectangular hole 8 is embedded into the positioning hole 6 of the positioning main body, the magnetic field intensity measurement handheld gauss meter probe is deeply inserted into the rectangular hole 8, the magnetic field intensity at a specific position can be obtained, the circumferential magnetic field intensity distribution uniformity is obtained, the test point radial basic size and the depth of the positioning main body 1 are tested, the tolerance is further controlled through the measurement positioning plug, the handheld gauss meter probe placement position is accurately positioned, the magnetic induction intensity test precision is improved, the device makes the magnetic induction intensity test more flexible, fast and easy, is not limited by the site and scene, is convenient to cooperate with the magnetic field intensity measurement handheld gauss meter probe, is accurately positioned, can be used for product process assembly, vacuum chamber installation test and various scenes, is portable and easy to operate.

Claims

1. A positioning device for Hall electric thruster magnetic induction strength test probe, comprising a positioning main body (1), a fixed clamping block assembly (2) and a measuring positioning plug (5), characterized in that, The fixed clamping block assembly (2) comprises a fixed body (3) and a sliding clamping block (4), the fixed body (3) is arranged on the front end surface of the positioning body (1), the fixed body (3) is provided with a moving sliding groove (7) and is provided with the sliding clamping block (4), one end of the sliding clamping block (4) is connected with the moving sliding groove (7) through the spring (9), a plurality of positioning holes (6) are arranged on the front end surface of the positioning body (1), the positioning holes (6) are arranged staggered with the fixed body (3), the measuring positioning plug block (5) is installed in the positioning hole (6), and the rectangular hole (8) for the probe positioning of the handheld gauss meter is arranged at the center position of the measuring positioning plug block (5).

2. A positioning device for Hall electric thruster magnetic induction strength test probe according to claim 1, characterized in that, The fixed body (3) is a cross structure, the moving sliding groove (7) is arranged on each cross side arm of the fixed body (3) and is provided with the sliding clamping block (4), the sliding clamping block (4) is an L-shaped structure, one arm of the sliding clamping block (4) is located outside the moving sliding groove (7), the other arm is in sliding connection with the moving sliding groove (7), and one end of the arm is connected with the moving sliding groove (7) through the spring (9).

3. Positioning device for Hall electric thruster magnetic induction strength test probes according to claim 1 or 2, characterized in that, The positioning body (1) and the fixed body (3) are an integral structure, and the moving sliding groove (7) is provided with a sliding groove cover at the front end.

4. The positioning device for Hall electric thruster magnetic induction strength test probe according to claim 1, characterized in that, The positioning body (1) is an annular columnar body, and the positioning hole (6) and the fixed clamping block assembly (2) are uniformly distributed with the annular columnar body center of the positioning body (1) as the reference.

5. The positioning device for Hall electric thruster magnetic induction strength test probe according to claim 1, characterized in that, The positioning hole (6) is a waist-shaped hole, and the measuring positioning plug block (5) is a waist-shaped columnar body matched with the positioning hole (6).

6. The positioning device for Hall electric thruster magnetic induction strength test probe according to claim 1, characterized in that, The measuring positioning plug block (5) is provided with different heights and rectangular hole (8) depths according to different axial positions of measurement.

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