CN111140400B - Anode air inlet assembly of electric propulsion engine - Google Patents
Anode air inlet assembly of electric propulsion engine Download PDFInfo
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- CN111140400B CN111140400B CN201911334613.8A CN201911334613A CN111140400B CN 111140400 B CN111140400 B CN 111140400B CN 201911334613 A CN201911334613 A CN 201911334613A CN 111140400 B CN111140400 B CN 111140400B
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- opening
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/42—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using liquid or gaseous propellants
- F02K9/44—Feeding propellants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/42—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using liquid or gaseous propellants
- F02K9/60—Constructional parts; Details not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H—PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H1/00—Using plasma to produce a reactive propulsive thrust
- F03H1/0087—Electro-dynamic thrusters, e.g. pulsed plasma thrusters
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Plasma & Fusion (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention provides an anode intake assembly of an electric propulsion engine. The anode intake assembly includes: an engine back plate having at least two mounting holes; an anode straight gas pipe passing through one of the mounting holes of the engine back plate; an anode elbow pipe passing through another one of the mounting holes of the engine back plate; the two insulating sleeves are respectively arranged between the anode straight gas pipe and one corresponding mounting hole and between the anode bent gas pipe and the other corresponding mounting hole; the inner welding joint comprises an upper opening, a left opening and a right opening, the upper opening is connected with the lower end of the anode straight gas pipe, and the left opening is connected with the lower end of the anode bent gas pipe; an insulator connected to a right opening of the inner welded joint; and an outer welding head connected with the insulator on the side of the insulator opposite to the inner welding head.
Description
Technical Field
The invention relates to the technical field of electric propulsion, in particular to an anode air inlet assembly of an electric propulsion engine.
Background
The space electric propulsion technology is an advanced propulsion technology and is widely applied to the aspects of attitude control, track transfer, north-south position keeping, repositioning and the like of the spacecraft. With the increasing development of microsatellites, the demand of spacecraft for electric propulsion engines is also on the trend of low power.
The low power of the electric propulsion engine leads to a considerable reduction in the size of the engine body and a more compact structure, and therefore the propellant supply of the engine becomes more complicated. The anode air inlet pipeline in the electric propulsion engine has higher discharge voltage, and components in the propellant supply system can be damaged by directly connecting the anode air inlet pipeline with the propellant supply pipeline, so an insulating sealing device needs to be arranged between the propellant supply pipeline and the anode air inlet pipeline of the engine, and the anode air inlet pipeline is reasonably arranged.
Disclosure of Invention
In order to solve the above problems, embodiments of the present invention provide an anode intake assembly for an electric propulsion engine having both sealing and insulating functions.
An anode intake assembly of an electric propulsion engine according to an embodiment of the present invention may include an engine back plate having at least two mounting holes; an anode straight gas pipe passing through one of the mounting holes of the engine back plate; an anode elbow pipe passing through another one of the mounting holes of the engine back plate; the two insulating sleeves are respectively arranged between the anode straight gas pipe and one corresponding mounting hole and between the anode bent gas pipe and the other corresponding mounting hole; the inner welding joint comprises an upper opening, a left opening and a right opening, the upper opening is connected with the lower end of the anode straight gas pipe, and the left opening is connected with the lower end of the anode bent gas pipe; an insulator connected to a right opening of the inner welded joint; and an outer welding head connected with the insulator on the side of the insulator opposite to the inner welding head.
In an alternative embodiment, the lower end of the anode straight gas pipe and the upper opening of the inner welding joint can be connected through a fastening structure, and the fastening structure comprises a ferrule front ring which is jointed with the upper opening of the inner welding joint, a ferrule rear ring which is jointed with the ferrule front ring, and a ferrule nut which covers the ferrule rear ring and is connected with the upper opening.
In an alternative embodiment, the lower end of the anode elbow may be connected to the left opening of the inner weld head by a fastening structure comprising a ferrule front ring engaging the upper opening of the inner weld head, a ferrule rear ring engaging the ferrule front ring, and a ferrule nut covering the ferrule rear ring and connected to the left opening.
In an alternative embodiment, the outside of the external weld joint may be provided with a fastening arrangement comprising a ferrule front ring engaging an opening in the outside of the external weld joint, a ferrule rear ring engaging the ferrule front ring, and a ferrule nut covering the ferrule rear ring and connected to the opening in the outside.
In an alternative embodiment, the upper and/or left opening of the inner weld head has a taper angle of 60 ° and the ferrule front ring has a taper angle of 90 °.
In an alternative embodiment, the opening on the outside of the male welding head has a taper angle of 60 ° and the ferrule front ring has a taper angle of 90 °.
In an alternative embodiment, the anode intake assembly may further include an inner weld ring disposed between the right opening of the inner weld joint and the insulator; an outer weld ring disposed between the insulator and the outer weld head, and wherein the inner weld head, inner weld ring, insulator, outer weld ring, outer weld head are sealingly connected together by welding.
In an alternative embodiment, the engine backing plate of the anode intake assembly further comprises a threaded hole disposed adjacent the mounting hole; and the anode air inlet assembly also comprises a holding structure for tightly pressing and fixing the insulating sleeve on the engine backboard, wherein the holding structure comprises a pressing sheet for pressing the insulating sleeve in a mounting hole of the engine backboard, a gasket arranged on the pressing sheet, and a fastening bolt which penetrates through the gasket and the pressing sheet and is screwed into a threaded hole of the engine backboard.
In an alternative embodiment, the shims include spring shims and flat shims.
In an alternative embodiment, two sets of said spacers and fastening bolts are used on each said platen to secure the insulating sleeve to said engine backplate.
In an alternative embodiment, the mounting hole of the engine back plate is a counterbore.
An anode intake assembly of an electric propulsion engine according to another alternative embodiment of the present invention may include an outer weld ring, a ferrule back ring, a ferrule front ring, a ferrule nut, an outer weld joint, a fastening bolt, a spring washer, a flat washer, a press sheet, an anode straight gas tube, an engine back plate, an insulation sleeve, an anode elbow tube, an inner weld joint, an inner weld ring, an insulator.
According to the anode air inlet assembly of the electric propulsion engine, an electrified anode pipeline inside a body of the electric propulsion engine is insulated from an engine back plate through a ceramic insulating sleeve; two gas pipelines of the engine anode are converged into one through a three-way joint, so that the gas pipeline is conveniently connected with a propellant supply pipeline; and a ceramic insulator is welded behind the junction point of the two anode gas pipes on the three-way joint, so that the other end of the three-way joint is electrically insulated from the electrified anode gas pipe.
The invention has the advantages that:
1) the ceramic and metal welding process is used, the sealing and insulation are integrated, and the structure is simple;
2) the requirement that a plurality of electrified air pipes at the anode of the electric propulsion engine are converged into one is met, and the electric propulsion engine is convenient to disassemble and assemble.
Drawings
Fig. 1 is a cross-sectional view of an anode intake assembly of an electric propulsion engine according to an embodiment of the present invention.
FIG. 2 is an enlarged partial view of an anode intake assembly of an electric propulsion engine according to one embodiment of the present invention.
FIG. 3 is a cross-sectional isometric view of an anode intake assembly of an electric propulsion engine according to an embodiment of the present invention.
The reference numerals in the figures denote the following parts,
100. anode air inlet assembly 1, external welding ring 5, external welding head 6, fastening bolt
7. Spring washer 8, flat washer 9, press sheet 10, anode straight gas tube
11. Engine back plate 12, insulating sleeve 13, anode elbow pipe 14 and inner welding joint
15. Inner welding ring 16, insulator 22, first ferrule rear ring 23, first ferrule front ring
24. First ferrule nut 32, second ferrule back ring 33, second ferrule front ring 34, second ferrule nut
42. Third ferrule back ring 43, third ferrule front ring 44, third ferrule nut.
Detailed Description
The following description of the present invention will be made with reference to the accompanying drawings 1 to 3. Certain terminology is used herein for convenience only and is not to be taken as a limitation on the present invention. For example, terms such as "upper," "lower," "left," "right," "horizontal," "vertical," "upward," and "downward" merely describe the configuration shown in the figures. Indeed, the components may be oriented in any direction and the terminology, therefore, should be understood as encompassing all such variations unless specified otherwise. In this specification, the word "comprising" is to be understood in its "open" sense, i.e. having the meaning of "and therefore should not be taken to be limited to the" closed "sense, i.e. to the meaning of" including only ". The corresponding meaning also applies to the corresponding words "comprising", "including", etc. Although expressions such as "1 st", "2 nd", "first" and "second" may be used to describe the respective elements of the present invention, they are not intended to limit the corresponding elements. For example, the above expressions are not intended to limit the order or importance of the corresponding elements. The above description is only intended to distinguish one element from another.
Fig. 1 is a cross-sectional view of an anode intake assembly of an electric propulsion engine according to an embodiment of the present invention. FIG. 2 is an enlarged partial view of an anode intake assembly of an electric propulsion engine according to one embodiment of the present invention. FIG. 3 is a cross-sectional isometric view of an anode intake assembly of an electric propulsion engine according to an embodiment of the present invention.
Referring to fig. 1 to 3, an anode intake assembly 100 of an electric propulsion engine according to an embodiment of the present invention includes: an engine back plate 11 with a mounting hole, an anode straight gas pipe 10 and an anode bent gas pipe 13 in an L form respectively disposed through the mounting hole of the engine back plate 11, an insulating sleeve 12 respectively disposed between the engine back plate 11 and the anode straight gas pipe 10 and the anode bent gas pipe 13, an inner weld joint 14 in a tee joint form respectively communicating with the anode straight gas pipe 10 and the anode bent gas pipe 13, an insulator 16 and an outer weld joint 5 successively connected with the other opening of the inner weld joint 14. Referring to fig. 1, the inner weld 14 of the three-way form of the present embodiment includes an upper opening and a left opening having threads, and a right opening having a stepped portion. It should be understood that in other embodiments, the inner weld joint 14 may be provided in other suitable forms as desired. The inner weld joint may be made of 304 stainless steel. The insulating sleeve 12 is made of an insulating material, such as, but not limited to, a ceramic material, and functions to insulate at high temperatures by providing the insulating sleeve 12. Optionally, the anode straight gas pipe 10 and the anode elbow pipe 13 are made of stainless steel, and the sizes thereof may be set to have an inner diameter of 1.5mm and an outer diameter of 3 mm. It is understood that in other embodiments of the present invention, the anode straight gas pipe 10 and the anode bent gas pipe 13 may be made of other suitable materials and may be manufactured in other suitable sizes. In this embodiment, the insulator 16 is made of an insulating material, such as, but not limited to, an alumina ceramic. The insulator 16 may be a substantially annular boss having one end welded to the inner weld head 14 and the other end welded to the outer weld head 5, and serves as an electrical insulator between the inner weld head 14 and the outer weld head 5. The outer welding head 5 may be made of a material such as 304 stainless steel.
As shown in fig. 1 to 3, in order to better press the insulating sleeve 12 against the engine back plate 11 to better hold the anode straight gas pipe 10 and the anode bent gas pipe 13, a holding structure may be provided. Referring to fig. 2, in the present embodiment, the holding structure may include a fastening bolt 6, a spring washer 7, a flat washer 8, and a pressing piece 9. During assembly, the pressing sheet 9 is sleeved on the insulating sleeve 12, the set of fastening bolt 6, the spring gasket 7 and the flat gasket 8 are screwed into the threaded hole on the engine backboard 11, and the pressing sheet 9 is used for pressing the insulating sleeve 12 in the mounting hole of the engine backboard 11. The mounting hole of the engine back plate 11 may alternatively be a counterbore, but is not limited thereto. Alternatively, two sets of the fastening bolts 6, the spring washers 7 and the flat washers 8 can be screwed into the engine back plate 11 to make the installation more stable. Alternatively, the pressing sheet 9 may be made of 304 stainless steel. In addition, it should be understood that the retaining structure of the present invention is not limited to the mechanism described above, and in other embodiments, other suitable retaining structures may be used as desired.
With continued reference to fig. 1 and 3, a first fastening structure is provided at the junction of the anode straight gas pipe 10 and the upper opening of the inner welded joint 14, and a second fastening structure is provided at the junction of the anode bent gas pipe 13 and the left opening of the inner welded joint 14 to ensure a secure connection. In addition, a third fastening structure may be provided at the outer end of the outer welding head 5 to facilitate connection to a propellant line (not shown). In this embodiment, the first fastening structure includes a first ferrule front ring 23 that engages the upper opening of the inner weld head 14, a first ferrule rear ring 22 that engages the first ferrule front ring 23, and a first ferrule nut 24 that caps the first ferrule rear ring 22, the first ferrule nut 24 having internal threads to mate with the external threads at the upper opening of the inner weld head 14. The lower end of the anode straight gas pipe 10 passes through the first fastening structure to be connected with the upper opening of the inner welded joint 14.
Similarly, the second fastening structure includes a second ferrule front ring 33 that engages the left opening of the inner weld head 14, a second ferrule rear ring 32 that engages the second ferrule front ring 33, and a second ferrule nut 34 that caps the second ferrule rear ring 32, the second ferrule nut 34 having internal threads to mate with the external threads at the left opening of the inner weld head 14. The lower end of the anode elbow 13 passes through the second fastening structure to be connected to the left opening of the inner welded joint 14.
Similarly, the third fastening structure includes a third ferrule front ring 43 engaging the outer end opening of the outer weld head 5, a third ferrule rear ring 42 engaging the third ferrule front ring 43, and a third ferrule nut 44 seated on the third ferrule rear ring 42, the third ferrule nut 44 having internal threads to mate with the external threads at the outer end opening of the outer weld head 5. The outer welding head 5 is welded at one end to the insulator 16 and at the other end to an external propellant feed line (not shown) using a third snap nut 44, a third snap rear ring 42 and a third snap front ring 43.
For the purpose of better tight fitting of the components of the first fastening arrangement, the opening above the inner weld head 14 is in the form of a tapered bore (in this embodiment, a 60 ° taper, but not limited thereto), the first ferrule front ring 23 includes a tapered front end matching the tapered bore and a tapered bore rear end (in this embodiment, a 90 ° taper, but not limited thereto), and the first ferrule rear ring 22 includes a tapered front end matching the tapered bore rear end of the first ferrule front ring 23. Alternatively, the second and third fastening structures may have the same structure as the first fastening structure described above. Preferably, the first fastening structure, the second fastening structure and the third fastening structure are the same and/or similar structures, that is, the components thereof are the same in specification, so as to facilitate the manufacture and installation, and also facilitate the reduction of the manufacturing cost and the replacement. However, it should be understood that in other embodiments, the first, second and third fastening structures may take on other different forms and sizes of structures as desired, without limitation.
With reference to fig. 1 and 3, in order to better achieve the weld fixation between the inner weld head 14 and the outer weld head 5, respectively, and the insulator 16 therebetween, an inner weld ring 15 may be arranged between the inner weld head 14 and the insulator 16, and an outer weld ring 1 may be provided between the insulator 16 and the outer weld head 5. At the time of assembly, the inner weld joint 14, the inner weld ring 15, the insulator 16, the outer weld ring 1, and the outer weld joint 5 are welded and sealed using a suitable welding means such as brazing. Alternatively, the inner and outer weld rings 15, 1 may be made using ceramic sealing alloys, but the invention is not limited thereto and in other embodiments, another suitable material may be used. The insulator 16 is made of an insulating material such as, but not limited to, alumina ceramic. As shown in fig. 1, in the present embodiment, the right opening of the inner weld joint 14 is in the form of a step, and accordingly the inner weld ring 15, the insulator 16, and the outer weld ring 1 also have corresponding step forms. The inner weld joint 14 having the step-shaped right opening and the inner weld ring 15, the insulator 16, and the outer weld ring 1, respectively, make it easier to fix the positions between the components, and the contact area is increased, and the weld fixation is more secure. It should be understood, however, that the configuration of the inner weld joint 14 of the present invention is not so limited and may have other suitable configurations as desired in other embodiments.
A method of assembling the anode intake assembly 100 of the electric propulsion engine according to one embodiment of the present invention will be described in detail with reference to fig. 1 to 3.
Referring to fig. 1-3, with the engine back plate 11 as a reference, two insulating sleeves 12 are placed in the counter bores of the engine back plate 11, and the upper boundary of the counter bores of the engine back plate 11 is used as a positioning.
Referring to fig. 2, the pressing sheet 9 is sleeved on the insulating sleeve 12, two sets of fastening bolts 6, spring washers 7 and flat washers 8 are screwed into two threaded holes on the engine backboard 11, and the pressing sheet 9 is used to press the insulating sleeve 12 into a counter bore of the engine backboard 11.
Referring to fig. 1 and 3, an anode straight gas pipe 10 is inserted into an insulating sleeve 12 from above, the upper end of the anode straight gas pipe 10 is connected with the anode of an electric propulsion engine, and the lower end of the anode straight gas pipe enters a hole of an inner welding joint 14 facing to the upper side of fig. 1 after passing through a ferrule nut 4, a ferrule rear ring 2 and a ferrule front ring 3 in sequence.
Referring to fig. 1 and 3, the first ferrule front ring 23 is successively placed into the tapered hole (in this embodiment, a 60 ° taper, but not limited thereto) above the inner weld joint 14, the first ferrule rear ring 22 is placed into the tapered hole (in this embodiment, a 90 ° taper, but not limited thereto) on the first ferrule front ring 23, the first ferrule nut 24 is fitted with the external thread of the inner weld joint 14 facing upward in fig. 1, and the ferrule nut 4 and the inner weld joint 14 are tightened until the tip of the ferrule front ring 3 completely bites into the outer surface of the anode straight gas tube 10.
Referring to fig. 1 and 3, the anode elbow 13 is inserted into the insulating sleeve 12 from above, the upper end of the anode elbow 13 is connected to the anode of the electric propulsion engine, and the lower end of the anode elbow is bent to the right and then enters the hole on the left side of the inner welded joint 14 in fig. 1 through the second ferrule nut 34, the second ferrule rear ring 32 and the second ferrule front ring 33.
Referring to fig. 1 and 3, the second ferrule front ring 33 is placed into the tapered hole (in this embodiment, a 60 ° taper, but not limited thereto) on the left side of the inner weld head 14, the second ferrule rear ring 32 is placed into the tapered hole (in this embodiment, a 90 ° taper, but not limited thereto) on the second ferrule front ring 33, the second ferrule nut 34 is fitted with the external thread on the left side of fig. 1 of the inner weld head 14, and the ferrule nut 4 and the inner weld head 14 are tightened until the tip of the second ferrule front ring 33 completely bites into the outer surface of the anode elbow 13.
Referring to fig. 1 and 3, the inner welding head 14 is limited by a right step of the inner welding head 14, an inner welding ring 15 (for example, but not limited to, ceramic seal alloy) is sleeved on the right side of the inner welding head 14, an insulator 16 (for example, but not limited to, alumina ceramic) is sleeved on the right side of the inner welding ring 15, an outer welding ring 1 (for example, but not limited to, ceramic seal alloy) is sleeved on the right side of the insulator 16, an outer welding head 5 is sleeved on the right side of the outer welding ring 1, and the inner welding head 14, the inner welding ring 15, the insulator 16, the outer welding ring 1 and the outer welding head 5 are welded and sealed by using a welding method such as a brazing process.
With reference to fig. 1 and 3, the third ferrule front ring 43 is successively placed into the tapered hole (in this embodiment, a 60 ° taper, but not limited thereto) on the right side of the external welding head 5, the third ferrule rear ring 42 is placed into the tapered hole (in this embodiment, a 90 ° taper, but not limited thereto) on the third ferrule front ring 43, the third ferrule nut 44 is fitted with the external thread on the right side of the external welding head 5, and after a propellant supply line (not shown) passes through the third ferrule nut 44, the third ferrule rear ring 42 and the third ferrule front ring 43 from the right end and enters the hole on the right side of the external welding head 5, the third ferrule nut 44 and the external welding head 5 are tightened until the tip of the third ferrule front ring 43 completely bites into the external surface of the propellant supply line.
To this end, an electric propulsion engine anode intake assembly 100 of the present invention is assembled. Propellant gas enters the apparatus through the externally welded joint 5 through a propellant feed line (not shown), is split into two anode gas pipes (i.e., anode straight gas pipe 10 and anode elbow pipe 13) with anode voltage through an insulator 16 or the like, and then electrically propels the engine anode. The device meets the insulation and sealing requirements of the anode air inlet device, and simultaneously has the function of dividing one propellant supply pipeline into two anode air pipes.
Furthermore, the foregoing describes only some embodiments and alterations, modifications, additions and/or changes may be made without departing from the scope and spirit of the disclosed embodiments, which are intended to be illustrative rather than limiting. Furthermore, the described embodiments are directed to embodiments presently contemplated to be the most practical and preferred, it being understood that the embodiments should not be limited to the disclosed embodiments, but on the contrary, are intended to cover various modifications and equivalent arrangements included within the spirit and scope of the embodiments. Moreover, the various embodiments described above can be used in conjunction with other embodiments, e.g., aspects of one embodiment can be combined with aspects of another embodiment to realize yet another embodiment. In addition, each individual feature or element of any given assembly may constitute additional embodiments.
The foregoing description of the embodiments has been presented for purposes of illustration and description and is not intended to be exhaustive or to limit the disclosure. The various elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.
Accordingly, it is to be understood that the drawings and description are proffered by way of example to facilitate comprehension of the invention and should not be construed to limit the scope thereof.
Claims (9)
1. An anode intake assembly for an electrically propelled engine, the anode intake assembly comprising:
an engine back plate having at least two mounting holes;
an anode straight gas pipe passing through one of the mounting holes of the engine back plate;
an anode elbow pipe passing through another one of the mounting holes of the engine back plate;
the two insulating sleeves are respectively arranged between the anode straight gas pipe and one corresponding mounting hole and between the anode bent gas pipe and the other corresponding mounting hole;
the inner welding joint comprises an upper opening, a left opening and a right opening, the upper opening is connected with the lower end of the anode straight gas pipe, and the left opening is connected with the lower end of the anode bent gas pipe;
an insulator connected to a right opening of the inner welded joint;
an outer weld joint connected to the insulator on a side of the insulator opposite the inner weld joint;
the anode intake assembly further comprises
An inner weld ring disposed between a right opening of the inner weld joint and the insulator;
an outer weld ring disposed between the insulator and the outer weld head, and
wherein the inner weld joint, the inner weld ring, the insulator, the outer weld ring, and the outer weld joint are sealingly joined together by welding.
2. The anode intake assembly of an electrically propelled engine of claim 1, wherein:
the lower end of the anode straight gas pipe is connected with the upper opening of the inner welding joint through a fastening structure, and the fastening structure comprises a clamping sleeve front ring connected with the upper opening of the inner welding joint, a clamping sleeve rear ring connected with the clamping sleeve front ring, and a clamping sleeve nut covering the clamping sleeve rear ring and connected with the upper opening.
3. An anode intake assembly for a propulsion engine as claimed in claim 1, wherein:
the lower end of the anode elbow pipe is connected with the left opening of the inner welding joint through a fastening structure, and the fastening structure comprises a cutting sleeve front ring connected with the upper opening of the inner welding joint, a cutting sleeve rear ring connected with the cutting sleeve front ring, and a cutting sleeve nut covering the cutting sleeve rear ring and connected with the left opening.
4. An anode intake assembly for a propulsion engine as claimed in claim 1, wherein:
the outer side of the outer welding head is provided with a fastening structure, and the fastening structure comprises a clamping sleeve front ring, a clamping sleeve rear ring and a clamping sleeve nut, wherein the clamping sleeve front ring is connected with an opening in the outer side of the outer welding head, the clamping sleeve rear ring is connected with the clamping sleeve front ring, and the clamping sleeve nut covers the clamping sleeve rear ring and is connected with the opening in the outer side.
5. An anode intake assembly for a propulsion engine as claimed in any one of claims 2 to 3, wherein:
the upper opening and/or the left opening of the inner weld joint has a conical surface angle of 60 degrees, and the ferrule front ring has a conical surface angle of 90 degrees.
6. An anode intake assembly for a propulsion engine as claimed in claim 4, wherein:
the opening on the outer side of the outer welding head has a conical surface angle of 60 degrees, and the front ring of the cutting sleeve has a conical surface angle of 90 degrees.
7. An anode intake assembly for a propulsion engine as claimed in claim 1, wherein:
the engine backing plate of the anode intake assembly further comprises a threaded hole disposed adjacent to the mounting hole; and is
The anode air inlet assembly also comprises a holding structure for tightly pressing and fixing the insulating sleeve on the engine back plate, and the holding structure comprises
A pressing sheet for pressing the insulating sleeve in the mounting hole of the engine backboard,
a shim disposed on the sheeting,
and the fastening bolt penetrates through the gasket and the pressing sheet and is screwed into the threaded hole of the engine back plate.
8. An anode intake assembly for a propulsion engine as claimed in claim 7, wherein:
the gasket comprises a spring gasket and a flat gasket; the mounting hole of the engine back plate is a counter bore.
9. An anode intake assembly for a propulsion engine as claimed in claim 7, wherein:
two sets of the shims and fastening bolts are used on each of the laminations to secure the insulating sleeve to the engine back plate.
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| CN201911334613.8A CN111140400B (en) | 2019-12-23 | 2019-12-23 | Anode air inlet assembly of electric propulsion engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911334613.8A CN111140400B (en) | 2019-12-23 | 2019-12-23 | Anode air inlet assembly of electric propulsion engine |
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| CN111140400A CN111140400A (en) | 2020-05-12 |
| CN111140400B true CN111140400B (en) | 2021-10-22 |
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| CN1390285A (en) * | 1999-09-13 | 2003-01-08 | 斯瓦戈洛克公司 | Tube fitting with indicating means |
| CN106351811A (en) * | 2016-09-09 | 2017-01-25 | 北京航空航天大学 | Low-power cylinder-type electromagnetic plasma thruster with adjustable magnetic field |
| CN107165794A (en) * | 2017-06-12 | 2017-09-15 | 北京航空航天大学 | A kind of adjustable low-power hall thruster with magnetic screening effect in magnetic field |
| CN109404240A (en) * | 2018-11-02 | 2019-03-01 | 北京航空航天大学 | A kind of electric propulsion engine air intake structure |
| CN110360073A (en) * | 2019-07-19 | 2019-10-22 | 北京航空航天大学 | A kind of electric thruster anode gas distribution device |
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