Nasal conical fluid director and manufacturing method thereof

Abstract

The invention discloses a nose cone-shaped fluid director and a manufacturing method thereof. The fluid director comprises a fluid guiding cone used for bearing impact of fuel gas flow, a non-metal protective cover used for resisting ablation of high-temperature fuel gas flow is attached to the surface of a groove of the fluid guiding cone, the fluid guiding cone comprises a shield with a nose conical surface, the nose head end of the shield is located on the upstream of the fuel gas flow, and the nose tail end of the shield is located on the downstream of the fuel gas flow. The edge of the nose conical surface of the shield extends towards the left side, the right side and the downstream to form a base surface, and the shield and the base surface are integrally in a state of inclining from the upstream of a gas flow to the downstream of the gas flow; a framework is welded on the shield and the lower surface of the base surface; second supporting plates which are vertically arranged and used for preventing fuel gas flow from rushing out of the side edges are welded to the left side and the right side of the base face respectively, a front baffle which extends in the left-right direction and is vertically arranged is welded to the end face of the shield nose head, and the front baffle completely covers the end face of the shield nose head and is in a smooth inverted-V shape. The device is small in occupied area, few in parts and easy to maintain.

Description

Technical Field

[0001] The invention relates to the technical field of aerospace rocket engine manufacturing, and in particular to a nose cone deflector and a manufacturing method thereof. Background Art

[0002] When a rocket is launched, the high-speed airflow from the tail nozzle of the rocket will affect various equipment below. When a solid rocket is launched, the airflow is also mixed with solid particles such as gunpowder. The acceleration of the airflow further aggravates the destructive power of the airflow at the tail of the rocket engine. In order to protect these equipment from being damaged, a deflector is needed to guide the airflow generated when the rocket is launched to the required direction.

[0003] The deflector is generally composed of a supporting metal body and a non-metallic protective panel that is resistant to high temperature erosion. The two are mainly fastened together by bonding. It is generally a "human" shaped structure with symmetrical diversion.

[0004] However, there is generally space limitation at the rear of the launch vehicle. The "human"-shaped deflector occupies a large area, has many parts, and is complex to maintain, which is not conducive to the maneuverability and interchangeability of some launch vehicles in combat environments. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention proposes a nose cone deflector and a manufacturing method thereof. The nose cone deflector occupies a small area, has few parts, is easy to maintain, and has better maneuverability and interchangeability than a herringbone deflector.

[0006] In order to achieve the above-mentioned purpose, the nose cone deflector designed by the present invention comprises a deflector cone for receiving the impact of the gas flow, and the surface of the groove of the deflector cone is bonded with a non-metallic protective cover for resisting the ablation of the high-temperature gas flow. The special feature of the deflector cone is that the deflector cone comprises a shield with a nose cone profile, and the nose end of the shield is located upstream of the gas flow, and the nose tail end of the shield is located downstream of the gas flow. The edges of the nose cone profile of the shield face the left and right sides, and extend downstream to form a base surface, and the shield and the base surface are in a state of being tilted from the upstream of the gas flow toward the downstream of the gas flow as a whole;

[0007] The shield and the lower surface of the base are welded with a frame, and the frame is formed by cross-welding a plurality of first support plates extending in the upstream and downstream directions and arranged at intervals, and vertical plates extending in the left and right directions and arranged at intervals, and the first support plates and vertical plates are both arranged vertically; the downstream edge of the frame is also welded with a rear sealing plate extending in the left and right directions and arranged vertically;

[0008] The left and right sides of the base surface are respectively welded with second support plates arranged vertically to block the gas flow from rushing out of the side. The end face of the shield nose is welded with a front baffle plate extending in the left and right directions and arranged vertically. The front baffle plate completely covers the end face of the shield nose and is in a smooth inverted V shape. The front baffle plate and the second support plates on the left and right sides together form a guide cone groove.

[0009] The bottom end of the front baffle, the bottom end of the second support plate, the bottom end of the first support plate, the bottom end of the vertical plate, and the bottom end of the rear sealing plate are at the same horizontal plane height;

[0010] A horizontally arranged front bottom plate is welded between the bottom end of the front baffle and the bottom end of the first upstream vertical plate, and the front bottom plate extends upstream to the outside of the front baffle; a horizontally arranged rear bottom plate is welded between the bottom ends of two adjacent downstream vertical plates.

[0011] Furthermore, a vertically arranged reinforcing rib plate is welded between the front bottom plate extending to the outer side of the front baffle and the front baffle.

[0012] Furthermore, the front bottom plate extends to the outer side of the front baffle and is provided with a plurality of waist-shaped grooves arranged at intervals, and the second support plates on the left and right sides are provided with a plurality of waist-shaped grooves arranged at intervals.

[0013] Furthermore, the rear sealing plate is provided with first bottom holes which are arranged at intervals and used to limit the downstream of the non-metallic protective cover, and the rear bottom plate is provided with second bottom holes which are arranged at intervals and used to fix the guide cone.

[0014] Furthermore, handles are welded on the outer sides of the second support plates.

[0015] Furthermore, a horizontally arranged triangular plate is welded between the edge of the rear bottom plate and the frame.

[0016] The present invention also provides a method for manufacturing a nose cone deflector, which is applicable to the above-mentioned nose cone deflector, and the method is particularly characterized in that it comprises the following steps:

[0017] S1) Guide cone welding and machining, the specific steps are as follows:

[0018] S11) Assemble the shield and the base surface to the Ng354-382 fixture, and use bolts and nuts to press the shield onto the Ng354-382 fixture;

[0019] S12) After the shield and the Ng354-382 tooling are assembled to meet the requirements, the shield is ground to the excess of the arc surface of the Ng354-382 tooling, and is ground to be flush with the arc surface of the Ng354-382 tooling;

[0020] S13) Assembling the front baffle, the second support plate, the first support plate, the vertical plate, and the rear cover plate, and checking the height deviation of the overall frame, assembling and welding the front bottom plate, the rear bottom plate, and other parts, and grinding the bottom surface of the frame according to the height deviation;

[0021] S14) firstly weld the welds between the front baffle, the first support plate, the second support plate, the vertical plate, the rear cover plate and the shield and the base surface, and then weld the welds between the front baffle, the first support plate, the second support plate and the vertical plate;

[0022] S15) inspecting the guide cone weld and placing the guide cone weld into a furnace for annealing to eliminate welding stress;

[0023] S16) With the guide cone facing downward and the bottom facing upward, the guide cone is pressed onto the bottom milling tool, and the front bottom plate and the rear bottom plate are milled, and then the waist groove on the front bottom plate and the second bottom hole on the rear bottom plate are milled; and the base surface and the shield are milled;

[0024] S17) Bottom surface positioning, use CNC boring method to straighten the front baffle straightness;

[0025] S18) performing a load-bearing test on the machined surface of the guide cone;

[0026] S19) Check whether the weld is cracked, desoldering or leaking;

[0027] S110) painting the closed structure cavity of the guide cone to prevent rust;

[0028] S2) Non-metallic protective cover machining;

[0029] S3) Deflector assembly.

[0030] Furthermore, in S1), MAG welding is used for welding, and the guide cone is not welded, and the guide cone is not allowed to be removed from the Ng354-382 tooling.

[0031] Furthermore, in S2), the specific machining steps of the non-metallic protective cover include: clamping the Ng329-182 milling fixture using a CNC boring method, clamping the non-metallic protective cover on the Ng329-182 milling fixture, grinding the chamfers, completing the trial assembly with the guide cone, and inspecting and warehousing.

[0032] Furthermore, in S3), the specific assembly steps of the deflector assembly include: sticking the non-metallic protective cover on the surface of the guide cone groove, using L-shaped left and right pressure plates to press the left and right edges of the non-metallic protective cover respectively, and then using a number of pressing parts to press and fix the left and right pressure plates; a vertically arranged fastening plate is set at the downstream edge of the guide cone to support the non-metallic protective cover to slide downward, and the fastening plate is close to the rear sealing plate, and the fastening plate and the rear sealing plate are fixed with bolts.

[0033] The advantages of the present invention are:

[0034] 1. Compared with the double-sided herringbone deflector in the prior art, the structure of the present invention is a single-sided nose cone shape, and the length is reduced by half, so the floor space is much smaller;

[0035] 2. In the process of manufacturing the deflector, the present invention adopts a self-created welding tool for welding. Different from the welding method in the prior art, the present invention welds the shield and the base surface first, and then welds the frame, thereby reducing welding stress and deformation;

[0036] 3. The profile of the present invention is machined integrally, so that the bonding surface and the non-metallic protective cover are more closely fitted and more firmly bonded;

[0037] The nose cone deflector and the manufacturing method thereof of the present invention occupy a small area, have few parts, are simple to maintain, and have better maneuverability and interchangeability than a herringbone deflector. The manufacturing process thereof reduces welding stress deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a top three-dimensional schematic diagram of the guide cone in the present invention;

[0039] Figure 2 It is a bottom three-dimensional schematic diagram of the guide cone in the present invention;

[0040] Figure 3 is a side view of the deflector of the present invention;

[0041] Figure 4 for Figure 3 A part of the BB section view;

[0042] Figure 5 is a top view of the deflector in the present invention;

[0043] In the figure: a pressing member 1, a guide cone 2, a non-metallic protective cover 3, a left pressing plate 4, a right pressing plate 5, and a fastening plate 6;

[0044] The guide cone 2 includes: a shield 2-1, a base surface 2-2, a first support plate 2-3, a vertical plate 2-4, a rear sealing plate 2-5, a second support plate 2-6, a front baffle plate 2-7, a front bottom plate 2-8, and a rear bottom plate 2-9;

[0045] The rear sealing plate 2-5 includes: a first bottom hole 2-51;

[0046] The second support plate 2-6 includes: a handle 2-61;

[0047] The front bottom plate 2-8 includes: a reinforcing rib plate 2-81;

[0048] The rear bottom plate 2-9 includes: a second bottom hole 2-91 and a triangular plate 2-92. DETAILED DESCRIPTION

[0049] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0050] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0051] like Figures 1 to 5 As shown, the present invention is a nose cone deflector, including a deflector cone 2 for receiving the impact of gas flow, the groove surface of the deflector cone 2 is bonded with a non-metallic protective cover 3 for resisting the ablation of high-temperature gas flow, the deflector cone 2 includes a shield 2-1 with a nose cone surface, and the nose end of the shield 2-1 is located upstream of the gas flow, and the nose tail end of the shield 2-1 is located downstream of the gas flow, the edges of the nose cone surface of the shield 2-1 are extended toward the left and right sides, and downstream to form a base surface 2-2, and the shield 2-1 and the base surface 2-2 are in a state of being inclined from the upstream of the gas flow toward the downstream of the gas flow as a whole.

[0052] The shield 2-1 and the lower surface of the base surface 2-2 are welded with a frame, and the frame is formed by cross-welding a plurality of first support plates 2-3 extending in the upstream and downstream directions and arranged at intervals, and vertical plates 2-4 extending in the left-right directions and arranged at intervals, and the first support plates 2-3 and the vertical plates 2-4 are both arranged vertically; a rear sealing plate 2-5 extending in the left-right directions and arranged vertically is also welded to the downstream edge of the frame.

[0053] The left and right sides of the base surface 2-2 are respectively welded with a vertically arranged second support plate 2-6 for blocking the gas flow from rushing out of the side. The nose end face of the shield 2-1 is welded with a front baffle plate 2-7 extending in the left and right directions and arranged vertically. The front baffle plate 2-7 completely covers the nose end face of the shield 2-1 and is in a smooth inverted V shape. The front baffle plate 2-7 and the second support plates 2-6 on the left and right sides together form a groove of the guide cone 2.

[0054] Preferably, handles 2-61 are welded on the outer sides of the second support plates 2-6.

[0055] The bottom end of the front baffle plate 2-7, the bottom end of the second support plate 2-6, the bottom end of the first support plate 2-3, the bottom end of the vertical plate 2-4, and the bottom end of the rear sealing plate 2-5 are at the same horizontal plane height.

[0056] Preferably, a horizontally arranged triangular plate 2-92 is welded between the edge of the rear bottom plate 2-9 and the frame to increase the connection strength between the rear bottom plate 2-9 and the frame.

[0057] A horizontally arranged front bottom plate 2-8 is welded between the bottom end of the front baffle 2-7 and the bottom end of the first upstream vertical plate 2-4, and the front bottom plate 2-8 extends upstream to the outside of the front baffle 2-7; a horizontally arranged rear bottom plate 2-9 is welded between the bottom ends of two adjacent downstream vertical plates 2-4.

[0058] Preferably, a vertically arranged reinforcing rib plate 2-81 is welded between the front bottom plate 2-8 extending to the outer portion of the front baffle plate 2-7 and the front baffle plate 2-7. The reinforcing rib plate 2-81 is used to increase the connection strength between the front bottom plate 2-8 and the front baffle plate 2-7.

[0059] The front bottom plate 2-8 extends to the outer side of the front baffle plate 2-7 and is provided with a plurality of waist-shaped grooves arranged at intervals, and the second support plates 2-6 on the left and right sides are provided with a plurality of waist-shaped grooves arranged at intervals, which are used as maintenance openings.

[0060] The rear sealing plate 2-5 is provided with first bottom holes 2-51 arranged at intervals and used to limit the downstream of the non-metallic protective cover 3. As described below, the first bottom holes 2-51 are used to install bolts to connect the rear sealing plate 2-5 and the fastening plate 6, and the fastening plate 6 is used to limit the non-metallic protective cover to slide toward the downstream.

[0061] The rear bottom plate 2-9 is provided with second bottom holes 2-91 arranged at intervals and used to fix the deflector cone 2. The second bottom holes 2-91 are used to install bolts to fix the entire deflector on the launch vehicle.

[0062] The present invention also provides a method for manufacturing a nose cone deflector, which is applicable to the above-mentioned nose cone deflector, and comprises the following steps:

[0063] S1) Welding and machining of the guide cone 2, specifically including the following steps:

[0064] First of all, before the formal assembly, you need to collect qualified parts and corresponding quality certification documents according to the parts list in the assembly process, collect welding wire WH70-G (ER70-G), welding wire specifications (φ1.0, φ1.2 or φ1.6) and argon with a purity of 99.99%, Ar+CO2 mixed gas (80% Ar+20% CO2), and the welding wire and shielding gas should have certificates, collect anhydrous ethanol, absorbent cotton, emery cloth, washing gasoline, etc.

[0065] In addition, before formal assembly, trial assembly is required to assemble the shield 2-1 and the base surface 2-2 to the Ng354-382 tooling, requiring the shield 2-1, the base surface 2-2 and the tooling to fit, and the local gap is not greater than 0.5, and the local refers to 10% of the total length of the weld; assemble the front baffle 2-7, the second support plate 2-6, the first support plate 2-3, the vertical plate 2-4, and the rear sealing plate 2-5 to ensure that the fitting gap between the frame and the shield 2-1 and the base surface 2-2 is not greater than 0.5, ensure the spacing of the first support plate 2-3, and ensure that the diagonal deviation of the entire frame is not greater than 1; detect the height deviation of the entire frame, grind the bottom surface of the frame according to the height deviation, and ensure that the flatness of the bottom plate is ≤1.5; trial install other components such as triangles and handles.

[0066] S11) Assemble the shield 2-1 and the base surface 2-2 to the Ng354-382 fixture, and use bolts and nuts to press the shield 2-1 onto the Ng354-382 fixture.

[0067] The Ng354-382 tooling is a self-created tooling.

[0068] Specifically, it is required that the gap between the guide cone shield 2-1 and the tooling is seamless over the entire length and not greater than 0.5 in some parts.

[0069] S12) After the shield 2-1 and the Ng354-382 tooling are assembled to meet the requirements, the shield 2-1 is ground to a margin that is higher than the arc surface of the Ng354-382 tooling, and is ground to be flush with the arc surface of the Ng354-382 tooling.

[0070] Specifically, a grinder is used to grind the excess of the guide cone shield 2-1 that is higher than the arc surface of the welding tooling, and grind it until it is flush with the arc surface of the welding tooling. During the grinding process, be careful to avoid damaging the surface of the welding tooling.

[0071] S13) Assemble the front baffle 2-7, the second support plate 2-6, the first support plate 2-3, the vertical plate 2-4, and the rear cover plate 2-5, and check the height deviation of the overall frame, assemble and weld the front bottom plate 2-8, the rear bottom plate 2-9, and other parts, and grind the bottom surface of the frame according to the height deviation.

[0072] S14) First weld the welds between the front baffle plate 2-7, the first support plate 2-3, the second support plate 2-6, the vertical plate 2-4, the rear cover plate 2-5 and the shield 2-1, the base surface 2-2, and then weld the welds between the front baffle plate 2-7, the first support plate 2-3, the second support plate 2-6 and the vertical plate 2-4.

[0073] Preferably, MAG welding is used for welding, and the guide cone 2 is not allowed to be removed from the Ng354-382 tooling before the welding is completed.

[0074] Manual tungsten inert gas welding can also be used for welding. MAG welding is preferred under the condition of ensuring welding strength. The specific welding requirements are implemented according to the drawings. Welding requirements: a) Use symmetrical welding as much as possible to reduce welding deformation; b) The weld surface must be free of cracks, unfused, weld nodules, arc damage and other appearance defects; c) Grind the weld; d) Remove the positioning splint after cooling after welding to reduce welding deformation, and grind the spot welding area, and do not damage the guide cone body; e) Welding is carried out according to the II level standard of QJ176B-2016; f) Clean the weld area before welding.

[0075] After welding is completed, inspection is required: 1) Use a 5-10x magnifying glass to check the appearance quality of the weld, which must meet the requirements of Level II welds in QJ176B-2016. It must be well formed, free of surface cracks, unfused, weld nodules, arc damage and other appearance defects. Spatter must be cleaned up, and the diagonal size difference of the guide cone must be no more than ≤3mm; 2) Use the profile detection template Ng060-543 to detect the arc profile of the guide cone R3019, and the maximum gap between the template and the arc profile of the guide cone must be no more than 1mm; Use the profile detection template Ng060-543 to detect the straightness of the guide cone, and the straightness of the tail must be no more than 2mm; 3) Detect the spacing: Detect the spacing size of the first support plate, and the upper and lower edge positions of the first support plate need to be detected.

[0076] S15) Inspect the weld of the guide cone 2 and put the guide cone 2 weldment into the furnace for annealing to eliminate welding stress. Then put it into storage and transfer to the next process.

[0077] S16) Place the guide cone 2 with the shaped surface facing downward and the bottom surface facing upward, and press it on the bottom surface milling tooling, mill the front bottom plate 2-8 and the rear bottom plate 2-9, then mill the waist-shaped groove on the front bottom plate 2-8 and the second bottom hole 2-91 on the rear bottom plate 2-9; mill the base surface 2-2 and the shield 2-1.

[0078] Specifically, the requirements are as follows: 1) Measure the actual allowance of the bottom plate (theoretical allowance 3mm), and do not allow milling to the weld; 2) When milling the front bottom plate 2-8 and the rear bottom plate 2-9, ensure that the minimum thickness of the front bottom plate 2-8 and the rear bottom plate 2-9 after machining is not less than 5mm; 3) The minimum thickness of the base surface 2-2 is not less than 3mm, and the R3020 profile and the roots of the front baffle 2-7 and the second support plate 2-6 retain R6 fillets; Process the shield 2-1 profile, requirements The minimum thickness of the shield 2-1 is not less than 3mm, the profile and the periphery of the guide cone base 2-2 are smoothly transitioned, and the R6 fillet is retained at the root of the second support plate 2-6; 5) Coordinated inspection and testing: Use the guide cone integral profile template Ng060-541 to inspect the guide cone base profile R3020 and the shield surface. The template inspection gap is required to be no more than 0.5mm, and a local gap of 0.5-1mm is allowed. The corresponding position where the gap is greater than 0.5mm is marked and repaired in the next process.

[0079] S17) Bottom surface positioning, use CNC boring method to straighten the front baffle 2-7 straightness.

[0080] Specifically, the straightness of the front baffle 2-7 is straightened to within 0.5 mm.

[0081] In addition, the following inspections are required: 1) Check each dimension according to the process diagram, use the guide cone integral profile template Ng060-541 to check the guide cone base profile R3020 and the shield surface. The template detection gap is required to be no greater than 0.5mm, and the actual measured value must be recorded. Local gaps of 0.5-1mm are allowed, and the corresponding positions where the gap is greater than 0.5mm must be marked; 2) Check the part markings; 3. Record the actual measured weight value.

[0082] S18) Carry out a load-bearing test on the machined surface of the guide cone 2.

[0083] S19) Check whether the weld is cracked, desoldering or leaking.

[0084] S110) The closed structure cavity of the guide cone 2 is painted to prevent rust.

[0085] Finally, the guide cone 2 is stored.

[0086] S2) Machining of the non-metallic protective cover 3, including clamping the Ng329-182 milling fixture by CNC boring, clamping the non-metallic protective cover 3 on the Ng329-182 milling fixture, grinding the chamfers, completing the trial assembly with the guide cone 2, and inspecting and warehousing.

[0087] The specific steps are as follows:

[0088] S21) Material collection: Collect qualified non-metallic protective covers and check product quality certificates.

[0089] S22) Boring: 1) Clamp the Ng329-182 milling fixture, straighten the side reference surface, find the symmetrical center of the two sides, and use this center as the main axis center; 2) Clamp the non-metallic protective cover 3, requiring the clamping force to be uniform, the straightness of the straightened R3020 horizontal surface should not be greater than 0.15, and at the same time, find that the height difference of the two arc generatrixes of R3020 should not be greater than 0.5mm;

[0090] S23) Pliers: 1) Grind the chamfers 10*45° and the intersection of the chamfers to make a smooth transition, weigh the non-metallic protective cover, and record the measured value; 2) Test-install the non-metallic protective cover and the guide cone shield, requiring that the R3020 surface of the guide cone shield shall not be higher than the R3020 surface of the non-metallic protective cover, and it is allowed to be 0.5mm lower, and the 120° cone surface gap shall not be greater than 0.5mm. At the same time, the side of the guide cone shield shall not protrude from the side of the non-metallic protective cover.

[0091] S24) Check the parts identification and appearance;

[0092] S25) storage.

[0093] S3) Deflector assembly, the specific steps are as follows:

[0094] The non-metallic protective cover 3 is pasted on the groove surface of the guide cone 2, and the left and right side edges of the non-metallic protective cover 3 are pressed by L-shaped left pressure plate 4 and right pressure plate 5 respectively, and then the left pressure plate 4 and the right pressure plate are pressed and fixed by several clamping parts 1; a vertically arranged fastening plate 6 is set at the downstream edge of the guide cone 2 to support the non-metallic protective cover 3 to slide downward, and the fastening plate 6 is close to the rear sealing plate 2-5, and the fastening plate 6 and the rear sealing plate 2-5 are fixed by bolts.

[0095] Specifically, the assembly process should be as follows:

[0096] 1) Before assembly, clean all attachments on the surface of all parts, especially the assembly surface; 2) Assemble according to the trial assembly (it is not allowed to hit non-metallic parts with metal objects, only rubber hammers are allowed to hit non-metallic parts). When assembling the clamping part 1, it is required to tighten it with a torque wrench with a torque value of 90±10N·m, and record the actual torque value one by one; 3) After assembly, grind the exposed end face of the non-metallic protective cover to be flush with the end face of the guide cone, and allow the non-metallic protective cover to protrude from the guide cone by 0~2mm.

[0097] After assembly, the following procedures are required: 1) Load-bearing test: perform an overall load-bearing test on the deflector; 2) X-ray inspection: perform X-ray inspection on the non-metallic protective cover and the metal body to check for cracks and desoldering; 3) Sandblasting: sandblast the non-assembly surface of the metal body deflector cone; 4) Painting: paint the sandblasted surface of the metal body deflector cone.

[0098] The nose cone deflector and the manufacturing method thereof of the present invention occupy a small area, have few parts, are simple to maintain, and have better maneuverability and interchangeability than a herringbone deflector. The manufacturing process thereof reduces welding stress deformation.

[0099] The above are preferred implementation modes of the invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A nose cone deflector, comprising a deflector cone (2) for receiving the impact of a gas flow, wherein a non-metallic protective cover (3) for resisting ablation of a high-temperature gas flow is attached to the surface of the groove of the deflector cone (2), wherein the non-metallic protective cover (3) is attached to the surface of the groove of the deflector cone (2), wherein the non-metallic protective cover (3) is attached to the surface of the groove of the deflector cone (2), and ... The guide cone (2) comprises a shield (2-1) with a nose cone-shaped surface, wherein the nose end of the shield (2-1) is located upstream of the gas flow, and the nose tail end of the shield (2-1) is located downstream of the gas flow. The edges of the nose cone-shaped surface of the shield (2-1) extend toward the left and right sides and downstream to form a base surface (2-2). The shield (2-1) and the base surface (2-2) are in a state of being tilted from the upstream of the gas flow toward the downstream of the gas flow as a whole. The shield (2-1) and the lower surface of the base surface (2-2) are welded with a frame, and the frame is formed by cross-welding a plurality of first support plates (2-3) extending in the upstream and downstream directions and arranged at intervals, and vertical plates (2-4) extending in the left-right direction and arranged at intervals, and the first support plates (2-3) and the vertical plates (2-4) are both arranged vertically; a rear sealing plate (2-5) extending in the left-right direction and arranged vertically is also welded to the downstream edge of the frame; The left and right sides of the base surface (2-2) are respectively welded with second support plates (2-6) arranged vertically and used to block the gas flow from rushing out of the side; the nose end face of the shield (2-1) is welded with a front baffle plate (2-7) extending in the left and right directions and arranged vertically; the front baffle plate (2-7) completely covers the nose end face of the shield (2-1) and is in a smooth inverted V shape; the front baffle plate (2-7) and the second support plates (2-6) on the left and right sides together form a groove of the guide cone (2); The bottom end of the front baffle plate (2-7), the bottom end of the second support plate (2-6), the bottom end of the first support plate (2-3), the bottom end of the vertical plate (2-4), and the bottom end of the rear sealing plate (2-5) are at the same horizontal plane height; A horizontally arranged front bottom plate (2-8) is welded between the bottom end of the front baffle (2-7) and the bottom end of the first upstream vertical plate (2-4), and the front bottom plate (2-8) extends upstream to the outside of the front baffle (2-7); and a horizontally arranged rear bottom plate (2-9) is welded between the bottom ends of two adjacent downstream vertical plates (2-4).

2. The nose cone deflector according to claim 1, characterized in that: A vertically arranged reinforcing rib plate (2-81) is welded between the front bottom plate (2-8) and the outer portion of the front baffle plate (2-7).

3. The nose cone deflector according to claim 2, characterized in that: The front bottom plate (2-8) extends to the outer side of the front baffle plate (2-7) and is provided with a plurality of waist-shaped grooves arranged at intervals, and the second support plates (2-6) on the left and right sides are provided with a plurality of waist-shaped grooves arranged at intervals.

4. The nose cone deflector according to claim 3, characterized in that: The rear sealing plate (2-5) is provided with first bottom holes (2-51) arranged at intervals and used to define the downstream of the non-metallic protective cover (3), and the rear bottom plate (2-9) is provided with second bottom holes (2-91) arranged at intervals and used to fix the guide cone (2).

5. The nose cone deflector according to claim 4, characterized in that: Handles (2-61) are respectively welded on the outer sides of the second support plates (2-6).

6. The nose cone deflector according to claim 5, characterized in that: A horizontally arranged triangular plate (2-92) is welded between the edge of the rear bottom plate (2-9) and the frame.

7. A method for manufacturing a nose cone deflector, applicable to the nose cone deflector according to any one of claims 1 to 6, characterized in that: The steps include: S1) Guide cone (2) Welding and machining. The specific steps are as follows: S11) Assemble the shield (2-1) and the base surface (2-2) to the Ng354-382 fixture, and use bolts and nuts to press the shield (2-1) onto the Ng354-382 fixture; S12) After the shield (2-1) and the Ng354-382 tooling are assembled to meet the requirements, the shield (2-1) is ground to the excess of the arc surface of the Ng354-382 tooling, and is ground to be flush with the arc surface of the Ng354-382 tooling; S13) assembling the front baffle plate (2-7), the second support plate (2-6), the first support plate (2-3), the vertical plate (2-4), and the rear cover plate (2-5), and checking the height deviation of the overall frame, assembling and welding the front bottom plate (2-8), the rear bottom plate (2-9), and other parts, and grinding the bottom surface of the frame according to the height deviation; S14) firstly weld the welds between the front baffle plate (2-7), the first support plate (2-3), the second support plate (2-6), the vertical plate (2-4), the rear sealing plate (2-5) and the shield (2-1), and the base surface (2-2), and then weld the welds between the front baffle plate (2-7), the first support plate (2-3), the second support plate (2-6) and the vertical plate (2-4); S15) inspecting the weld of the guide cone (2) and placing the guide cone (2) weldment into a furnace for annealing to eliminate welding stress; S16) The guide cone (2) is pressed onto a bottom surface milling tool with the profile facing downward and the bottom surface facing upward, and the front bottom plate (2-8) and the rear bottom plate (2-9) are milled, and then the waist groove on the front bottom plate (2-8) and the second bottom hole (2-91) on the rear bottom plate (2-9) are milled; the base surface (2-2) and the shield (2-1) are milled; S17) bottom surface positioning, using CNC boring method to straighten the front baffle (2-7) straightness; S18) performing a load-bearing test on the machined surface of the guide cone (2); S19) Check whether the weld is cracked, desoldering or leaking; S110) painting the closed structure cavity of the guide cone (2) to prevent rust; S2) Non-metallic protective cover (3) Machining; S3) Deflector assembly.

8. The method for manufacturing a nose cone deflector according to claim 7, characterized in that: In S14), the welding is performed by MAG welding, and the guide cone (2) is not welded, so it is not allowed to remove the guide cone (2) from the Ng354-382 tooling.

9. The method for manufacturing a nose cone deflector according to claim 8, characterized in that: In S2), the specific machining steps of the non-metallic protective cover (3) include: clamping the Ng329-182 milling fixture by CNC boring, clamping the non-metallic protective cover (3) on the Ng329-182 milling fixture, grinding the chamfers, completing the trial assembly with the guide cone (2), and inspecting and warehousing.

10. The method for manufacturing a nose cone deflector according to claim 9, characterized in that: S3), the specific assembly steps of the deflector assembly include: sticking the non-metallic protective cover (3) on the groove surface of the deflector cone (2), respectively using L-shaped left pressure plate (4) and right pressure plate (5) to press the left and right side edges of the non-metallic protective cover (3), and then using a plurality of pressing parts (1) to press and fix the left pressure plate (4) and the right pressure plate; arranging a vertically arranged fastening plate (6) at the downstream edge of the deflector cone (2) to support the non-metallic protective cover (3) to slide downward, and the fastening plate (6) is close to the rear sealing plate (2-5), and the fastening plate (6) and the rear sealing plate (2-5) are fixed by bolts.

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