Split type thruster protection tool

Abstract

A split type thruster protection tool comprises a base and a cover body. The base comprises a base body and a cover body side inserting groove, and the base body is installed on the end face of the thruster. The cover body side insertion grooves are formed in the two sides of the base body and used for insertion installation of the cover body. The whole cover body is of a square box structure and comprises a cover body, a cover body cover plate and a cover body hinge. One side of the cover body is designed to be open and serves as an observation opening. A notch with a channel is formed in one side adjacent to the opening side, and the channel is used for being inserted into a side slot of the cover body; the other surfaces are protection surfaces without openings; the cover body cover plate is connected with the cover body through the cover body hinge, the size of the cover body cover plate is equal to that of the opening side of the cover body, and the cover body cover plate is opened or closed through the cover body hinge when needed. The problem that a thruster protection tool is insufficient in universality, adaptability and operability is solved.

Description

Technical Field

[0001] The invention relates to a split thruster protection tooling, belonging to the technical field of spacecraft design. Background Art

[0002] Currently, there are two main types of spacecraft propulsion systems: chemical propulsion systems and electric propulsion systems. Chemical propulsion systems integrate an energy source and a working fluid. They use the energy released by a chemical reaction to heat the working fluid, which is then accelerated through a nozzle and ejected at a high velocity, generating reaction thrust.

[0003] Chemical propulsion systems include cold gas propulsion systems, monopropellant propulsion systems, and bipropellant propulsion systems. Bipropellant technology is a relatively mature technology, widely used in large satellites, spacecraft, and space shuttles due to its high specific impulse. The bipropellant engine operates as follows: After the fuel and oxidizer solenoid valves are opened, the two propellants flow through the injector, where they collide to atomize and mix the combustion chamber and oxidizer. Momentum provides direct mechanical mixing, with all atomization occurring near the point of impact. Because of the use of hypergolic propellants, a chemical reaction occurs upon contact between the two propellants, producing high-temperature combustion gases that are expelled from the nozzle at high speed to generate thrust.

[0004] 10N and 25N thrusters are commonly used on-orbit position maintenance and attitude control actuators in bipropellant unified propulsion systems. Whether their operation is normal or not directly determines the success or failure of satellite orbit or attitude control.

[0005] The 10N and 25N thrusters are installed on the surface of the satellite. Their nozzles are coated with a special coating. If scratched, bumped, or deformed, they could burn through during on-orbit ignition, risking a reduction in thrust. Therefore, protecting the thruster nozzles during assembly is crucial.

[0006] Existing 10N and 25N thruster protection tooling generally utilizes the installation interface design of the thruster bracket design. The bracket design and the thruster protection tooling design are highly coupled and have poor versatility. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and solve the problems of insufficient versatility, adaptability and operability of thruster protection tooling.

[0008] The purpose of the present invention is achieved through the following technical solutions:

[0009] In a first aspect, the present invention provides a split thruster protection tooling, comprising a base and a cover;

[0010] The base includes a base body and a cover side slot. The base body is mounted on the end face of the thruster. The cover side slots are arranged on both sides of the base body for inserting and installing the cover.

[0011] The cover body is in the shape of a square box, including the cover body, the cover cover, and the cover hinge. One side of the cover body is open and serves as an observation port. The side adjacent to the open side is provided with a notch with a groove for inserting into the cover body side slot. The remaining surfaces are all protective surfaces without openings.

[0012] The cover plate is connected to the cover body through a cover hinge, and has a size comparable to that of the opening side of the cover body. It can be opened or closed through the cover hinge when needed.

[0013] Based on the first aspect, in one embodiment of the present invention, the base body is an axisymmetric structure formed by an integrated machine of aluminum alloy material, and any two opposite side surfaces can be selected as mounting surfaces of the cover side slots.

[0014] Based on the first aspect, in one embodiment of the present invention, the cover side slot is an aluminum alloy machined structure, and by controlling the angle deviation of the cover side slot, a damping effect of tightening the cover during insertion is achieved.

[0015] Based on the first aspect, in one embodiment of the present invention, after the cover body is inserted into place, a sliding block provided at the flange of the bottom of the cover body is used to achieve reliable locking of the cover body and the base.

[0016] Based on the first aspect, in one embodiment of the present invention, the sliding block adopts a screw-fastened waist-shaped opening structure.

[0017] Based on the first aspect, in one embodiment of the present invention, the base is mounted on the end face of the thruster by screws, and the screws are connected to the base in a retention mode.

[0018] Based on the first aspect, in one embodiment of the present invention, the cover hinge has an arbitrary stop function.

[0019] Based on the first aspect, in one embodiment of the present invention, the outer envelope of the base is a square.

[0020] In a second aspect, the present invention provides a method for using the split thruster protection tooling according to the first aspect, comprising:

[0021] S1. When installing, first use screws to install the base body on the end face of the thruster;

[0022] S2. Push the cover body into the cover side slot and lock it in place;

[0023] S3. When it is necessary to measure the thruster's accuracy or inspect its surface condition, remove the cover body.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) The present invention does not rely on the installation interface of the star or bracket, but directly adopts the interface of the standardized product; the state is stable and the model spectrum is unified;

[0026] (2) The cover and the base of the present invention are designed to be separated. The base is made of metal and the cover can be flexibly changed, which is suitable for thrusters of multiple specifications such as 10N and 25N;

[0027] (3) The cover of the present invention is easy to assemble and disassemble, and the base is usually not disassembled, which can meet the high-frequency working conditions such as precision measurement and surface condition inspection;

[0028] (4) The overall rigidity of the present invention is higher than that of all existing protective devices, and the protective capability is strong;

[0029] (5) The existing protective cover interface is on the bracket, and the M2 thread is easily damaged. The design of the present invention avoids this problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the thruster protection tooling.

[0031] Figure 2 Schematic diagram of the thruster protection tooling base.

[0032] Figure 3a This is a first-person perspective diagram of the thruster protection tooling cover.

[0033] Figure 3b This is a schematic diagram of the thruster protection tooling cover from the second perspective.

[0034] Figure 4 Schematic diagram of installing thruster protection tooling for thrusters. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0036] A split thruster protection tooling, such as Figure 1 As shown, it includes two parts: a base and a cover.

[0037] Based on the four thermal control shield interfaces of the 10N / 25N thruster product, the outer envelope of the base is determined to be a square. The base includes the base body and the side slots of the cover body, such as Figure 2 shown.

[0038] The base body is an axisymmetric structure made of aluminum alloy and can be selected as any two opposite sides as the mounting surfaces of the cover side slots.

[0039] The side slots of the cover are machined from aluminum alloy, installed on either side of the base body for inserting and installing the cover. By controlling the angular deviation of the side slots, a damping effect is achieved, tightening the cover as it is inserted. Once the cover is in place, a sliding block located at the bottom flange of the cover securely locks the cover to the base. This sliding block is achieved by screwing the waist-shaped opening structure. The screw preload is adjusted to precisely meet the waist-shaped opening structure, allowing it to be pushed and pulled to any position. After being fixed, the screws are glued to prevent loosening, forming a permanent sliding mechanism.

[0040] The base is mounted on the end face of the 10N / 25N thruster using two to four screws. Tightening any two of the four screws secures the base. The screw-to-base connection is a retention mechanism, commonly known as a "loose-and-hold" mechanism, preventing the screws from falling during operation. This also allows for flexible removal and installation of the protective fixture without the need for additional fasteners.

[0041] The cover body is a square box structure, including the cover body, the cover cover, and the cover hinge. Figure 3b shown.

[0042] One side of the cover body is designed to be open (i.e. Figure 3a The opening surface in the middle serves as an observation port for the 10N / 25N nozzle; a notch with a groove is provided on the side adjacent to the opening surface for inserting into the cover side slot of the base; the remaining surfaces are protective surfaces without openings.

[0043] The cover plate is connected to the cover body through a cover hinge, and has a size comparable to that of the opening side of the cover body. It can be opened or closed through the cover hinge when needed.

[0044] The cover hinge has an arbitrary stop function, and the cover plate is locked by a sliding block on the bottom flange of the cover after it is closed.

[0045] A method of using a split thruster protection tooling is as follows:

[0046] S1. When installing, first install the base body on the end face of the 10N / 25N thruster using 2 to 4 screws on the base; Figure 4 As shown;

[0047] S2. Push the cover body into the cover side slot and lock it in place;

[0048] S3. When it is necessary to measure the thruster's accuracy or inspect its surface condition, the cover body can be removed. The base connected to the product does not need to be removed, which can reduce the number of times the product side threads are disassembled and assembled, and effectively protect the product threads.

[0049] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

[0050] Although the present invention has been disclosed above in terms of preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solutions of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the scope of protection of the technical solutions of the present invention.

Claims

1. A split thruster protection tooling, characterized in that: including a base and a cover; The base includes a base body and a cover side slot. The base body is mounted on the end face of the thruster. The cover side slots are arranged on both sides of the base body for inserting and installing the cover. The cover body is in the shape of a square box, including the cover body, the cover cover, and the cover hinge. One side of the cover body is open and serves as an observation port. The side adjacent to the open side is provided with a notch with a groove for inserting into the cover body side slot. The remaining surfaces are all protective surfaces without openings. The cover plate is connected to the cover body through a cover hinge, and has a size comparable to that of the opening side of the cover body. It can be opened or closed through the cover hinge when needed.

2. The split thruster protection tooling according to claim 1, characterized in that: The base body is an axisymmetric structure made of aluminum alloy and can be selected as any two opposite sides as the mounting surfaces of the cover side slots.

3. The split thruster protection tooling according to claim 1, characterized in that: The side slots of the cover body are made of aluminum alloy machined structures. By controlling the angle deviation of the side slots of the cover body, a damping effect is achieved in which the cover body becomes tighter as it is inserted.

4. The split thruster protection tooling according to claim 1, characterized in that: After the cover body is inserted into place, the cover body and the base are reliably locked by using the sliding block provided at the flange of the bottom of the cover body.

5. The split thruster protection tooling according to claim 4 is characterized in that: The sliding stopper adopts a screw-fastened waist-shaped opening structure.

6. The split thruster protection tooling according to claim 1, characterized in that: The base is mounted on the end face of the thruster by screws, and the screws and the base are connected in a retention mode.

7. The split thruster protection tooling according to claim 1, characterized in that: The cover hinge has an arbitrary stop function.

8. The split thruster protection tooling according to claim 1, characterized in that: The outer envelope of the base is square.

9. A method for using the split thruster protection tooling according to claim 1, characterized in that: include: S1. When installing, first use screws to install the base body on the end face of the thruster; S2. Push the cover body into the cover side slot and lock it in place; S3. When it is necessary to measure the thruster's accuracy or inspect its surface condition, remove the cover body.

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