CN219827049U - Grid thermal deformation prevention ion thruster - Google Patents

Abstract

The utility model discloses a grid thermal deformation prevention ion thruster, which comprises an ionization chamber, a grid bracket, a screen grid system, a second mounting sleeve, an acceleration grid system, a first mounting sleeve and a flange plate which are connected together in sequence through bolts; the screen grid system comprises a screen grid and a second snap ring, and a plurality of radially arranged second sliding grooves are uniformly arranged on the second snap ring; the screen grid is provided with a plurality of second buckling columns, and the second buckling columns are positioned at the near center end of the second sliding groove during installation; the accelerating grid system comprises an accelerating grid and a first snap ring arranged on the periphery of the accelerating grid, and a plurality of first sliding grooves which are radially arranged are uniformly formed in the first snap ring; be provided with a plurality of first buckle posts on the bars of accelerating, and first buckle post is located the nearly heart end of first spout when installing. The utility model has the advantages of simple structure and high stability, and can effectively prevent the grid from thermal deformation and improve the performance of the thruster.

Description

A grid anti-thermal deformation ion thruster

Technical field

The invention relates to the technical field of aerospace electric propulsion, and more specifically to an ion thruster with a grid that prevents thermal deformation.

Background technique

The gate system deforms under the action of thermal stress. The gate in the non-working state is called a cold gate, and the gate that deforms in the working state is called a hot gate. The difference in flow field parameters inside and outside the discharge chamber will cause the screen grid and accelerating grid to undergo thermal stress and deformation. This will also cause changes in the spacing between the screen grid and the accelerating grid, which will in turn cause the generation of the grid electric field configuration. Changes will further affect the working status, performance parameters and life of the ion thruster.

The current grid structure design used in the grid assembly, test results show that although it can meet the performance index requirements of the thruster, there are still problems such as uncontrollable changes in the thermal spacing of the grid before and after operation, grid deformation, grid hole corrosion deformation, etc. question. These problems range from affecting beam extraction and reducing thruster performance to causing grid sparks and short circuits, directly causing thruster failure. Therefore, controlling the thermal deformation of the grid and maintaining the stability of the grid spacing are key issues to ensure the long-term operation of the ion thruster.

Therefore, there is an urgent need for an ion thruster that prevents thermal deformation of the grid.

Contents of the invention

The technical problem to be solved by the present invention is to provide an ion thruster that prevents thermal deformation of the grid to solve the problem that the difference in flow field parameters inside and outside the discharge chamber will cause thermal deformation of the grid.

In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

An ion thruster with a grid that prevents thermal deformation, including an ionization chamber, a grid bracket, a screen system, a second installation sleeve, an accelerating grid system, a first installation sleeve, and a flange plate that are connected in sequence by bolts; The screen grid system includes a screen grid and a second snap ring arranged on the periphery of the screen grid. The second snap ring is evenly provided with a number of radially arranged second chute; The second buckling post is installed in the second chute, and when installed, the second buckling post is located at the proximal end of the second chute; the acceleration grid system includes an acceleration grid and a first snapper arranged on the outer periphery of the acceleration grid. The first buckle ring is evenly provided with a number of radially arranged first chute; the acceleration grid is provided with a number of first buckle posts for fitting in the first chute, and is installed When the first snap post is located at the proximal end of the first chute.

To further optimize the technical solution, there are eight first snapping posts and eight second snapping posts.

To further optimize the technical solution, the length of the first chute is shorter than the length of the second chute.

To further optimize the technical solution, the thickness of the first mounting sleeve is greater than the thickness of the second mounting sleeve.

To further optimize the technical solution, the gate bracket includes an annular ring body and a baffle wall vertically arranged on the outer circumference of the ring. The height of the baffle wall is equal to the second buckle ring, the second installation sleeve, and the first buckle ring. , the sum of the thicknesses of the first mounting sleeve and the flange.

To further optimize the technical solution, the ionization chamber, the grid bracket, the second snap ring, the second mounting sleeve, the first snap ring, the first mounting sleeve and the flange are all provided with eight evenly arranged and corresponding Bolt holes are provided so that bolts can pass through and be fixed.

Due to the adoption of the above technical solutions, the technical progress achieved by the present invention is as follows.

The invention provides an ion thruster for preventing thermal deformation of the grid, which effectively reduces the axial thermal deformation generated when the grid is thermally deformed by arranging snap posts and chute and releasing stress in the reserved space in the chute. It can reduce the axial thermal deformation of the grid assembly and maintain a relatively stable grid spacing, thereby stabilizing the performance of the thruster. The invention has the advantages of simple structure, high stability, can effectively prevent the thermal deformation of the grid and improve the performance of the thruster.

Description of the drawings

Figure 1 is an exploded view of the present invention;

Figure 2 is a perspective view of the present invention;

Figure 3 is a schematic structural diagram of the middle screen grid and the second snap ring of the present invention;

Figure 4 is a schematic structural diagram of the second chute of the present invention;

Figure 5 is a schematic structural diagram of the middle accelerating grid and the first snap ring of the present invention.

Among them: 1. Flange plate, 2. First installation sleeve, 3. Acceleration grid, 31. First snap post, 4. First snap ring, 41. First chute, 5. Second installation sleeve, 6. Screen grid, 61. Second snap post, 7. Second snap ring, 71. Second chute, 8. Grid bracket, 9. Ionization chamber.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

An ion thruster with a grid that prevents thermal deformation, as shown in Figures 1 to 5, including a flange 1, a first installation sleeve 2, an accelerating grid 3, a first snap ring 4, a second installation sleeve 5, and a screen. Grid 6, second snap ring 7, grid bracket 8, ionization chamber 9. The acceleration grid 3 is provided with a first buckle post 31; the first buckle ring 4 is provided with a first chute 41; the screen grid 6 is provided with a second buckle post 61; the second buckle ring 7 is provided with a second chute. 71.

The ionization chamber 9, the grid bracket 8, the screen grid system, the second installation sleeve 5, the accelerating grid 3 system, the first installation sleeve 2, and the flange 1 are connected together in sequence through bolts. The grid bracket 8 includes a circular ring body and a blocking wall vertically arranged on the outer periphery of the ring. The height of the blocking wall is equal to the second snap ring, the second mounting sleeve 5, the first snap ring, and the first mounting sleeve. 2 and the thickness of flange 1. The second snap ring, the second mounting sleeve 5, the first snap ring, the first mounting sleeve 2 and the flange 1 are located in the groove formed between the retaining wall and the ring body. The ionization chamber 9, the grid bracket 8, the second snap ring, the second installation sleeve 5, the first snap ring, the first installation sleeve 2 and the flange 1 are provided with eight evenly arranged and identically positioned bolts. holes for the bolts to pass through and secure.

The screen grid system includes a screen grid 6 and a second snap ring 7 arranged on the outer periphery of the screen grid 6 . The second snap ring 7 is evenly provided with eight radially arranged second chute 71 . The screen 6 is provided with eight second buckling posts 61 for fitting in the second slide grooves 71 . The second slide groove 71 corresponds to the second buckling post 61 one-to-one, and the second buckling post 61 is located at the proximal end of the second slide groove 71 during installation.

The accelerating grid 3 system includes an accelerating grid 3 and a first snap ring 4 arranged on the outer periphery of the accelerating grid 3. The first snap ring 4 is evenly provided with eight radially arranged first chute 41. The accelerating grid 3 is provided with a first snapping post 31 for fitting in the first chute 41. The first snapping post 31 corresponds to the first chute 41, and when installed, the first snapping post 31 is located at The proximal end of the first chute 41.

Due to the difference in flow field parameters inside and outside the discharge chamber, the screen grid 6 and the accelerating grid 3 are subjected to different thermal stresses and deformations. Therefore, the length of the first chute 41 is shorter than the length of the second chute 71; the thickness of the screen grid is less than The thickness of the accelerating grid, so the thickness of the first mounting sleeve 2 is greater than the thickness of the second mounting sleeve 5; the distance between the screen grid 6 and the accelerating grid 3 remains unchanged, thereby improving the stability and life of the grid system.

When the present invention is actually used, the grid system body will be deformed under the action of thermal stress; when the deformation occurs, when the accelerating grid 3 is extended, the first snapping column 31 can be positioned in the reserved space of the first chute 41 to prevent the first buckling column 31 from being deformed in the axial direction. When the screen 6 extends in the radial direction, the second buckling column 61 can be stretched in the reserved space of the second slide groove 71 , thereby preventing axial deformation of the second buckling column 61 .

Claims (6)

1. A grid thermal deformation prevention ion thruster is characterized in that: the device comprises an ionization chamber (9), a grid support (8), a screen grid system, a second mounting sleeve (5), an acceleration grid system, a first mounting sleeve (2) and a flange plate (1) which are connected together in sequence through bolts; the screen grid system comprises a screen grid (6) and a second clamping ring (7) arranged on the periphery of the screen grid (6), and a plurality of second sliding grooves (71) which are radially arranged are uniformly formed in the second clamping ring (7); the screen grid (6) is provided with a plurality of second buckling columns (61) which are used for being assembled in the second sliding groove (71), and the second buckling columns (61) are positioned at the near-center end of the second sliding groove (71) during installation; the accelerating grid system comprises an accelerating grid (3) and a first clamping ring (4) arranged on the periphery of the accelerating grid (3), wherein a plurality of first sliding grooves (41) which are radially arranged are uniformly formed in the first clamping ring (4); the accelerating grid (3) is provided with a plurality of first buckling columns (31) which are used for being assembled in the first sliding groove (41), and the first buckling columns (31) are positioned at the near-center end of the first sliding groove (41) during installation.

2. The grid heat distortion prevention ion thruster of claim 1, wherein: eight first buckling columns (31) and eight second buckling columns (61) are arranged.

3. The grid heat distortion prevention ion thruster of claim 2, wherein: the length of the first sliding groove (41) is smaller than that of the second sliding groove (71).

4. A gate thermal deformation prevention ion thruster according to claim 3, wherein: the thickness of the first mounting sleeve (2) is larger than that of the second mounting sleeve (5).

5. The grid heat distortion prevention ion thruster of claim 4, wherein: the grid support (8) comprises a ring body which is in a ring shape and a retaining wall which is vertically arranged on the periphery of the ring, and the height of the retaining wall is equal to the sum of the thicknesses of the second snap ring, the second mounting sleeve (5), the first snap ring, the first mounting sleeve (2) and the flange plate (1).

6. The grid heat distortion prevention ion thruster of claim 5, wherein: eight bolt holes which are uniformly arranged and correspondingly arranged are formed in the ionization chamber (9), the grid support (8), the second clamping ring, the second mounting sleeve (5), the first clamping ring, the first mounting sleeve (2) and the flange plate (1), so that bolts can pass through and are fixed.