Press fitting device for solid rocket engine component

Abstract

The utility model provides a solid rocket engine part press fitting device which comprises a press machine, a pressing transmission assembly and a base, the base is located under a pressing head of the press machine, and the base is provided with a positioning part for directionally fixing the lower end of an engine part to be press-fitted. The upper end of an engine part to be pressed is connected with a pressing head of the press machine through the pressing transmission assembly. According to the utility model, a product is vertically placed, the centering property of an engine part is good, the engine part can be quickly centered and assembled, and meanwhile, the self gravity of the engine part and the pressure of a press are utilized, so that the engine part can be conveniently and stably pressed axially and fixed radially, and the product is prevented from toppling over; the assembly efficiency and safety are high, and the problems that a conventional horizontal press-fitting component is poor in centering performance and unstable in pressing force are effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of aerospace technology, and particularly relates to a solid rocket engine component press-fitting device. BACKGROUND

[0002] At present, the solid rocket engine components are three kinds of cylindrical component structures, the outer wall surface of the cylindrical component contains an external hanging piece, and each component external hanging piece has a directional requirement; because the traditional threaded connection mode cannot guarantee the directional requirement, the ring key connection mode is selected to guarantee the positional directionality requirement and the connection strength requirement between the cylindrical component and the external hanging piece.

[0003] Conventionally, the cylindrical components of the solid rocket engine of this type are butt-jointed by horizontally placing the product and then using a mechanism to press-fit and assemble. However, the conventional assembly mode has the following defects: (1) the radial fit clearance of the cylindrical component is small, and a sealing ring is often designed at the connection, the assembly resistance is large, and the press-fitting equipment needs to be able to adjust the constant pressure output value; (2) the centering assembly precision of each cylindrical component is high when horizontally butt-jointed; (3) the fit clearance between the ring key and the keyway is small in order to guarantee the connection strength between the cylindrical components; (4) the cylindrical component contains a pyrotechnic product, and the operation risk is high. Once the cylindrical component cannot be correctly press-fitted in place, the following losses will be caused: 1) the ring key cannot be assembled into the keyway, and the product cannot be completed; 2) the ring key is stuck during assembly, and cannot be taken out or continued to be assembled, causing the product to be scrapped; 3) the ring key may not be completely assembled into the keyway, and the missing ring key causes the connection strength between the cylindrical components to not meet the use requirement, causing the product to be scrapped. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a solid rocket engine component press-fitting device, which can at least solve some defects in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A solid rocket engine component press-fitting device, comprising a press, a pressing transmission assembly and a base, the base is located directly below the pressure head of the press, the base is provided with a positioning part for fixing and positioning the lower end of the engine component to be press-fitted, and the upper end of the engine component to be press-fitted is connected to the pressure head of the press through the pressing transmission assembly.

[0007] Further, the pressing transmission assembly comprises a lower connecting plate, an upper connecting plate and a connecting unit connecting the lower connecting plate and the upper connecting plate, the upper connecting plate is provided with a force transmission cylinder segment for butt-jointing with the pressure head of the press, and the lower connecting plate is in positioning and fixed connection with the upper end of the engine component to be press-fitted.

[0008] Further, the connecting units are a plurality of first screw rods, and the first screw rods are arranged along the circumference of the upper connecting plate at intervals.

[0009] Further, a plurality of adjusting rods are arranged at intervals along the circumference of the outer side of the lower connecting plate and extend along the radial direction of the lower connecting plate.

[0010] Further, at least part of the segments of the engine component to be pressed are provided with a direction adjusting mechanism for driving the segments to rotate around the axis of the segments.

[0011] Further, the base comprises a bottom plate and a clamp, the bottom plate is placed on the bottom platform of the press, and the clamp is fixedly installed at the center of the bottom plate.

[0012] Further, the central axis of the clamp coincides with the central axis of the pressure head of the press.

[0013] Further, the solid rocket engine component pressing device further comprises a locking assembly for locking and fixing the intermediate segment of the engine component to be pressed.

[0014] Further, the locking assembly comprises two clamp rings connected through bolts, and a plurality of fixing blocks that can be fixedly connected with the frame of the press are arranged at intervals along the circumference of the outer side of the clamp rings.

[0015] Further, screw holes are arranged on the fixing blocks, a connecting block is arranged on the frame of the press, and the connecting block is connected with the screw holes on the fixing blocks through second screw rods.

[0016] Compared with the prior art, the solid rocket engine component pressing device has the following beneficial effects:

[0017] (1) The solid rocket engine component pressing device provided by the utility model can vertically place the product, the engine component has good centering performance, the engine component can be quickly centered and assembled, the engine component can be conveniently axially stably pressed and radially fixed by using the gravity of the engine component and the pressure of the press, the product can be prevented from tilting, the assembly efficiency and safety are high, and the problems of poor centering performance and unstable pressing force of conventional horizontal pressing components can be effectively avoided.

[0018] (2) The solid rocket engine component pressing device provided by the utility model has simple structure, low manufacturing cost and good applicability, has no strict requirements on the assembly environment and conditions, is a metal structural member, has good safety during the assembly of a pyrotechnic product, and is simple to maintain and low in cost.

[0019] The utility model will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of the solid rocket engine component press fitting device.

[0021] The reference signs are explained as follows: 1, press machine; 2, press transmission assembly; 3, locking assembly; 4, cylindrical component; 5, base; 6, bottom plate; 7, hoop; 8, force transmission cylinder segment; 9, upper connecting plate; 10, first screw rod; 11, lower connecting plate; 12, adjusting rod; 13, clamping ring; 14, fixed block; 15, second screw rod; 16, connecting block. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0024] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be in contact with the connection or integrally connected; for those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features; in the description of the present application, unless otherwise specified, the meaning of "multiple", "several" is two or more.

[0026] As Figure 1As shown, the embodiment provides a solid rocket engine component press-fitting device, which comprises a press 1, a pressing transmission assembly 2 and a base 5. The base 5 is located directly below the press head of the press 1, and the base 5 is provided with a positioning part for positioning and fixing the lower end of the engine component to be press-fitted. The upper end of the engine component to be press-fitted is connected with the press head of the press 1 through the pressing transmission assembly 2. The engine component to be press-fitted comprises a plurality of cylindrical components 4, and each cylindrical component 4 is sequentially butted along the axial direction. Specifically, the embodiment takes three cylindrical components 4 as an example for description.

[0027] In the embodiment, the press 1 is used to provide vertical pressure, and the stable output pressure value can be adjusted according to the requirement. The pressing transmission assembly 2 and the three cylindrical components 4 are axially press-fitted into place by the downward movement of the press head along the vertical direction to overcome the resistance of the double O-shaped sealing ring. The pressing transmission assembly 2 is used to transmit the axial pressure applied by the press head of the press 1 to the engine component to be press-fitted, and to position the uppermost cylindrical component 4 according to the directional requirement. The base 5 is used to position the lowermost cylindrical component 4 according to the directional requirement.

[0028] During assembly, the lower cylindrical component 4 is installed on the positioning part of the base 5, the upper cylindrical component 4 is connected with the pressing transmission assembly 2, and the pressing transmission assembly 2 is butted with the press head of the press 1. Then, the middle cylindrical component 4 is placed between the upper and lower cylindrical components 4 and is preliminarily positioned and butted with them. After that, the press head of the press 1 moves downward along the vertical direction to axially press-fit the pressing transmission assembly 2 and the three cylindrical components 4. After press-fitting into place, the direction of the middle cylindrical component 4 is adjusted according to the directional requirement. Finally, the connection parts of the cylindrical components 4 are fixed.

[0029] Specifically, the connection parts of the adjacent two cylindrical components 4 are provided with key grooves, and the ring keys are assembled at the key grooves of the connection parts of the adjacent two cylindrical components 4 after the cylindrical components 4 are press-fitted into place, so as to realize the fixed connection between the adjacent two cylindrical components 4.

[0030] As a specific embodiment, the pressing transmission assembly 2 comprises a lower connecting plate 11, an upper connecting plate 9 and a connecting unit connecting the lower connecting plate 11 and the upper connecting plate 9. The upper connecting plate 9 is provided with a force transmission cylinder segment 8 for butting with the press head of the press 1. The lower connecting plate 11 is fixedly connected with the upper end of the engine component to be press-fitted. The press head of the press 1 applies axial pressure to the force transmission cylinder segment 8, and the axial pressure is transmitted to the cylindrical components 4 through the upper connecting plate 9 and the lower connecting plate 11, so as to press-fit into place after overcoming the resistance of the sealing ring at the radial matching surface of the cylindrical components 4.

[0031] Optionally, the connecting unit can adopt a plurality of first screw rods 10 arranged along the circumference of the upper connecting plate 9 and disposed between the lower connecting plate 11 and the upper connecting plate 9, and the distance between the lower connecting plate 11 and the upper connecting plate 9 can be adjusted by the first screw rods 10.

[0032] Optionally, a plurality of adjusting rods 12 are arranged at equal intervals along the circumference of the outer side of the lower connecting plate 11 and extend along the radial direction of the lower connecting plate 11. Since the assembly between the cylindrical components 4 to be press-fitted has directionality, the adjusting rods 12 can be used to adjust the circumferential direction of the cylindrical components 4 and then position them according to the directionality requirements. In some embodiments, at least part of the segments (i.e., the cylindrical components 4) to be press-fitted are also provided with a direction adjusting mechanism for rotating them around their own axes, and the circumferential direction of the corresponding cylindrical components 4 is adjusted by the direction adjusting mechanism.

[0033] In an optional embodiment, the base 5 includes a bottom plate 6 and a clamp 7. The bottom plate 6 is placed on the bottom platform of the press 1 and serves as a work platform for placing the engine components to be press-fitted. The clamp 7 is fixedly installed at the center of the bottom plate 6 and constitutes a positioning part of the base 5 for radially clamping the lowermost cylindrical component 4 and playing a role of orientation. The structural design of the base 5 can prevent the engine components to be press-fitted from falling over.

[0034] Preferably, the central axis of the clamp 7 coincides with the central axis of the press head of the press 1, which has high centering accuracy and high speed and ensures uniform stress of the cylindrical components 4 during butt joint.

[0035] Preferably, the distance between the bottom plate 6 of the base 5 and the press head of the press 1 is adjustable to adapt to press-fitting of product components of different heights and expand the application range of the press-fitting device.

[0036] In an optimized embodiment, the solid rocket engine component press-fitting device of the present embodiment further includes a locking assembly 3 for locking and fixing the middle segment of the engine components to be press-fitted. Specifically, when the cylindrical components 4 are press-fitted in place, the middle cylindrical components 4 are locked by the locking assembly 3 and fixed together with the press 1, which prevents the engine components from falling over during subsequent assembly of ring keys and plays a role of safety backup.

[0037] In some embodiments, the locking assembly 3 comprises two embracing rings 13 connected by bolts, the middle cylindrical part 4 is locked by the embracing rings 13, and a plurality of fixing blocks 14 are arranged on the outer side of the embracing rings 13 at equal intervals in the circumferential direction, and the fixing blocks 14 are fixed to the frame of the press 1, so that the middle cylindrical part 4 is fixed to the press 1. Specifically, the fixing blocks 14 are provided with screw holes, the support of the press 1 is provided with a connecting block 16, after the cylindrical part 4 is assembled in place, the direction of the middle cylindrical part 4 is adjusted according to the directionality requirement, after the adjustment, the connecting block 16 of the press 1 is connected and fixed to the screw holes of the fixing blocks 14 at the corresponding positions of the embracing rings 13 by the second screw rod 15, so that the middle cylindrical part 4 is fixed to the press 1, and the stability of the middle cylindrical part 4 is ensured.

[0038] Tests show that the solid rocket engine part press-fitting device of the embodiment can realize fast centering and assembly of the engine part by vertically placing the product, the engine part has good centering, the engine part axial stability and radial fixation can be conveniently realized by using the gravity of the engine part and the pressure of the press, the product is prevented from tilting, the assembly efficiency and safety are high, the problems of poor centering and unstable pressing force of conventional horizontal press-fitting parts are effectively avoided, the operation and use are convenient, the operator can operate after simple training, the ring key can be easily assembled into the key groove after the product cylindrical parts are press-fitted in place by the device, the assembly efficiency is high, the press-fitting device has low manufacturing cost (only more than 20,000 yuan), and the maintenance cost is low (mainly regular replacement of hydraulic oil, replacement twice a year, and replacement cost is about 100 yuan / time).

[0039] The above examples are only illustrative of the present application, and do not constitute a limitation on the protection scope of the present application, and any design identical or similar to the present application belongs to the protection scope of the present application.

Claims

1. A solid rocket motor component press-fitting device, characterized in that: The device includes a press, a pressing transmission assembly, and a base. The base is located directly below the press head of the press. The base has a positioning part for directional fixing of the lower end of the engine component to be pressed. The upper end of the engine component to be pressed is connected to the press head of the press through the pressing transmission assembly.

2. The solid rocket motor component press-fitting device as described in claim 1, characterized in that: The pressing transmission assembly includes a lower connecting plate, an upper connecting plate, and a connecting unit connecting the lower connecting plate and the upper connecting plate. The upper connecting plate is provided with a force transmission cylinder section for docking with the press head of the press. The lower connecting plate is fixedly connected to the upper end of the engine component to be pressed.

3. The solid rocket motor component press-fitting device as described in claim 2, characterized in that: The connecting unit consists of several first screws, which are arranged at intervals along the circumference of the upper connecting plate.

4. The solid rocket motor component press-fitting device as described in claim 2, characterized in that: The lower connecting plate is provided with a plurality of adjusting rods spaced circumferentially on its outer side, and the adjusting rods are arranged to extend radially along the lower connecting plate.

5. The solid rocket motor component press-fitting device as described in claim 1, characterized in that: At least some segments of the engine component to be press-fitted are equipped with a direction adjustment mechanism that drives it to rotate around its own axis.

6. The solid rocket motor component press-fitting device as described in claim 1, characterized in that: The base includes a base plate and a clamp. The base plate is placed on the bottom platform of the press, and the clamp is fixedly installed at the center of the base plate.

7. The solid rocket motor component press-fitting device as described in claim 6, characterized in that: The central axis of the clamp coincides with the central axis of the press head of the press.

8. The solid rocket motor component press-fitting device as described in claim 1, characterized in that: It also includes a locking assembly for locking and securing intermediate sections of engine components to be press-fitted.

9. The solid rocket motor component press-fitting device as described in claim 8, characterized in that: The locking assembly includes two clamping rings connected by bolts, and a number of fixing blocks that can be connected and fixed to the frame of the press are arranged at equal intervals along the circumference of the clamping rings.

10. The solid rocket motor component press-fitting device as described in claim 9, characterized in that: The fixed block is provided with a screw hole, and the frame of the press is provided with a connecting block. The connecting block is connected to the screw hole on the corresponding fixed block through a second screw.

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