阅读说明：本技术 一种固体火箭发动机后裙连接机械臂式级间分离试验装置及方法 (Solid rocket engine rear skirt connection mechanical arm type interstage separation test device and method ) 是由 祝子文 高永刚 曲悠扬 邱飞 杨建宏 颜文选 罗驭川 崔宇杰 韩黎亮 于 2021-06-30 设计创作，主要内容包括：本发明提出了一种固体火箭发动机后裙连接机械臂式级间分离试验装置和方法,分离试验装置包括前抱环组件、后抱环组件和连接杆；前抱环组件与后抱环组件均分别包括上抱环、下抱环、机械臂以及滚轮组件,后抱环组件外端还固定有后连接板；后连接板上开有若干沿周向均布的连接孔,用于连接子级发动机的后裙；上抱环外表面的周向两侧设置有各自与机械臂连接的接口结构；接口结构能够与机械臂一端的弧板结构配合,使机械臂能够通过弧板结构沿上抱环外表面周向移动并在移动到位后固定。该分离试验装置便捷性在于所有组装过程均在地面,组装完毕后再吊起,不用在高空进行组装；所有的调整全部集中在机械臂上,调试方便,提高安全性的同时提高了工作效率。(The invention provides a solid rocket engine rear skirt connecting mechanical arm type interstage separation test device and a method, wherein the separation test device comprises a front holding ring assembly, a rear holding ring assembly and a connecting rod; the front holding ring component and the rear holding ring component respectively comprise an upper holding ring, a lower holding ring, a mechanical arm and a roller component, and the outer end of the rear holding ring component is also fixed with a rear connecting plate; the rear connecting plate is provided with a plurality of connecting holes which are uniformly distributed along the circumferential direction and used for connecting a rear skirt of the secondary engine; interface structures which are respectively connected with the mechanical arm are arranged on two circumferential sides of the outer surface of the upper holding ring; the interface structure can cooperate with the arc plate structure at one end of the mechanical arm, so that the mechanical arm can move along the circumferential direction of the outer surface of the upper hoop through the arc plate structure and is fixed after moving in place. The separation test device is convenient and fast in that all the assembling processes are on the ground, and the separation test device is hoisted after being assembled without being assembled at high altitude; all adjustments are concentrated on the mechanical arm, so that the debugging is convenient, the safety is improved, and the working efficiency is improved.)

1. The utility model provides a solid rocket engine back skirt connects mechanical arm formula interstage separation test device which characterized in that: the device comprises a front holding ring component, a rear holding ring component and a connecting rod;

the front holding ring component and the rear holding ring component respectively comprise an upper holding ring, a lower holding ring, a mechanical arm and a roller component, and the outer end of the rear holding ring component is also fixed with a rear connecting plate;

the rear connecting plate is provided with a plurality of connecting holes which are uniformly distributed along the circumferential direction and used for connecting a rear skirt of the secondary engine;

the upper holding ring and the lower holding ring can be connected in a combined mode to hold the secondary engine tightly, and elastic elements are arranged on the inner surfaces of the upper holding ring and the lower holding ring and used for being in contact with the secondary engine;

interface structures which are respectively connected with the mechanical arm are arranged on two circumferential sides of the outer surface of the upper holding ring; the interface structure can be matched with an arc plate structure at one end of the mechanical arm, so that the mechanical arm can move along the circumferential direction of the outer surface of the upper holding ring through the arc plate structure and is fixed after moving in place;

the mechanical arm on one side of the upper embracing ring consists of an arc plate, a beam and a roller assembly, and the arc plate and the roller assembly are fixed at two ends of the beam; the inner side surface of the arc plate can be attached to the outer surface of the upper embracing ring and is matched with the interface structure of the outer surface of the upper embracing ring;

the roller assembly consists of a height adjusting structure at the upper part and a roller at the lower part;

and the connecting rods are axially connected with the front hoop holding assembly and the rear hoop holding assembly, so that the front hoop holding assembly and the rear hoop holding assembly are connected into a whole.

2. The solid rocket engine rear skirt connection mechanical arm type interstage separation test device according to claim 1, characterized in that: the connecting holes in the rear connecting plate are long connecting holes, the length direction of the connecting holes is perpendicular to the connecting surface of the upper holding ring and the lower holding ring, and the upper holding ring and the lower holding ring can still be connected with the rear skirt of the secondary engine after being compressed.

3. The solid rocket engine rear skirt connection mechanical arm type interstage separation test device according to claim 1, characterized in that: the elastic element is felt.

4. The solid rocket engine rear skirt connection mechanical arm type interstage separation test device according to claim 1, characterized in that: the interface structure comprises a sliding block and connecting holes, wherein the sliding block is located in the middle of the width direction of the upper embracing ring, the connecting holes are located on two sides of the sliding block, the sliding block is of a long strip-shaped structure which is arranged on the outer surface of the upper embracing ring along the circumferential direction, and the opening directions of the connecting holes on two sides of the sliding block all indicate the circle center of the upper embracing ring.

5. The solid rocket engine rear skirt connection mechanical arm type interstage separation test device according to claim 4, characterized in that: a circumferential sliding groove is arranged in the middle of the inner side surface of the arc plate in the width direction, and a plurality of circumferential strip holes are arranged on two sides of the sliding groove; the sliding block on the outer surface of the upper embracing ring is matched with the sliding groove on the inner side surface of the arc plate, so that the upper embracing ring and the arc plate are prevented from axial displacement, and the length of the sliding groove is greater than that of the sliding block; the long holes arranged on two sides of the sliding groove are correspondingly matched with the connecting holes on two sides of the sliding block on the outer surface of the upper embracing ring, the upper embracing ring and the mechanical arm arc plate can move relatively through the sliding block sliding groove, and the upper embracing ring and the mechanical arm arc plate can be fixed at a required position through a fastening bolt; the relative position of the mechanical arm can be realized by loosening the fastening bolt and adjusting the relative position of the strip hole and the connecting hole.

6. The solid rocket engine rear skirt connection mechanical arm type interstage separation test device according to claim 1 or 4, characterized in that: the mechanical arm can complete circumferential +/-6.5-degree adjustment.

7. The solid rocket engine rear skirt connection mechanical arm type interstage separation test device according to claim 1, characterized in that: in the roller component, a height adjusting structure at the upper part adopts a screw rod and sliding block structure, a radial thimble is arranged on the surface of a shell of the height adjusting structure, a key groove in the height direction is arranged on the side surface of a sliding block in the shell, and the key groove is matched with the thimble to limit the rotation freedom degree of the sliding block; the center of the sliding block is provided with an axial threaded hole, the center of the shell is provided with a screw rod, the screw rod is matched with the central axial threaded hole of the sliding block, and the axial movement of the sliding block is realized by rotating the screw rod; the gyro wheel is connected to the slider lower extreme, realizes the regulation of gyro wheel height to can accomplish the separation test with the guide rail cooperation.

8. The solid rocket engine rear skirt connection mechanical arm type interstage separation test device according to claim 1, characterized in that: the front hoop assembly and the rear hoop assembly are connected in a manner that three connecting rods are uniformly distributed along the circumferential direction, wherein one connecting rod is arranged at the center of the top of the upper hoop, and the other two connecting rods are arranged at two sides of the lower hoop; the connecting rods arranged at the two sides of the lower embracing ring are also used as mounting connecting pieces of the balance weight arc plates, the mounting positions of the balance weight arc plates and the gravity center position of the separation test device are in the same longitudinal plane, and the quality of the whole separation test device is adjusted by adjusting the number of the balance weight arc plates according to needs.

9. A method of conducting an interstage separation test using the separation test apparatus of claim 1, wherein: the method comprises the following steps:

step 1: dropping a lower holding ring of the separation test device on the ground, limiting the lower holding ring to prevent the lower holding ring from rotating, and hoisting to drop the sub-stage engine into the lower holding ring;

step 2: the sub-engine is tightly held by the upper holding ring and the lower holding ring through elastic elements to form a test device assembly, and the sub-engine and the separation test device are connected into a whole through a rear connecting plate;

and step 3: hoisting the combination of the sublevel engine and the separation test device to connect the sublevel engine and the separation test device with a sublevel section:

loosening the connecting bolts on the arc plates and adjusting to a standing state; hoisting the assembly, circumferentially adjusting the whole assembly to complete the butt joint of the sub-engine and the stage section, adjusting the mechanical arm to a horizontal state, and fixing the arc plate;

and 4, step 4: adjusting the roller assembly, and dropping the roller onto the elevated guide rail;

and 5: interstage separation tests were completed.

Technical Field

The invention relates to a mechanical arm type test device for connecting a rear skirt of a solid rocket engine, and belongs to the technical field of interstage separation tests of solid rocket engines.

Background

The existing interstage separation test device of the solid rocket engine adopts a clamping structure, namely, a plurality of groups of small arc plate structures are adopted to extrude a sublevel engine, so that the effect of a hoop is achieved, and the sublevel engine and the test device can be separated out together.

However, with the improvement of the performance of the solid rocket engine, the volume and the weight of the sublevel engine are greatly improved, the sublevel separation speed is also improved, and when the traditional mode is applied to the new interstage separation test, the risk that the frictional force is not large enough and the sublevel engine is separated from the separation tool and flies out directly exists. Moreover, the traditional clamping structure has the advantage that the lower arc seat can deform due to the fact that the quality of the small arc plate is fully supported on the lower arc seat, and the installation difficulty is increased. As shown in fig. 12.

In addition, before the separation test, the secondary engine is required to be connected with the front part of the stage section to be tested, the original upper arc seat and lower arc seat type interstage separation test device is provided with a rib plate extending out of the upper arc seat to form a base, and then a roller assembly is connected to form a linear motion pair, but the structure can only adjust the center height of the separation test device and the whole secondary engine, but cannot solve the problem of circumferential dislocation of the stage section to be tested and the secondary engine, when the circumferential hole position between the stage section to be tested and the secondary engine needs to be adjusted, other workpieces need to be borrowed, and the rotation of the secondary engine in the separation test device is very difficult to adjust, and time and labor are wasted.

Disclosure of Invention

In order to avoid the defects of the prior art, the invention provides a solid rocket engine rear skirt connecting mechanical arm type interstage separation test device and method, which are particularly suitable for a separation test with a high sublevel separation speed so as to meet the test requirements of high sublevel weight, high speed and short test period.

The device adopts the arm structure, and the arm structure can freely slide in last arc seat circumference certain limit, can lift up the arm before the butt joint to the assembly circumference position of whole adjustment separation test device and sublevel engine, then according to actual position, adjust the arm to the horizontality, and the wheel adjustment center height that falls again accomplishes the butt joint of sublevel engine and stage section.

The technical scheme of the invention is as follows:

the solid rocket engine rear skirt connecting mechanical arm type interstage separation test device comprises a front holding ring assembly, a rear holding ring assembly and a connecting rod;

the front holding ring component and the rear holding ring component respectively comprise an upper holding ring, a lower holding ring, a mechanical arm and a roller component, and the outer end of the rear holding ring component is also fixed with a rear connecting plate;

the rear connecting plate is provided with a plurality of connecting holes which are uniformly distributed along the circumferential direction and used for connecting a rear skirt of the secondary engine;

the upper holding ring and the lower holding ring can be connected in a combined mode to hold the secondary engine tightly, and elastic elements are arranged on the inner surfaces of the upper holding ring and the lower holding ring and used for being in contact with the secondary engine;

interface structures which are respectively connected with the mechanical arm are arranged on two circumferential sides of the outer surface of the upper holding ring; the interface structure can be matched with an arc plate structure at one end of the mechanical arm, so that the mechanical arm can move along the circumferential direction of the outer surface of the upper holding ring through the arc plate structure and is fixed after moving in place;

the mechanical arm on one side of the upper embracing ring consists of an arc plate, a beam and a roller assembly, and the arc plate and the roller assembly are fixed at two ends of the beam; the inner side surface of the arc plate can be attached to the outer surface of the upper embracing ring and is matched with the interface structure of the outer surface of the upper embracing ring;

the roller assembly consists of a height adjusting structure at the upper part and a roller at the lower part;

and the connecting rods are axially connected with the front hoop holding assembly and the rear hoop holding assembly, so that the front hoop holding assembly and the rear hoop holding assembly are connected into a whole.

Furthermore, the connecting holes in the rear connecting plate are long connecting holes, the length direction of the connecting holes is perpendicular to the connecting surface of the upper holding ring and the lower holding ring, and the upper holding ring and the lower holding ring can still be connected with the rear skirt of the secondary engine after being compressed.

Further, the elastic element is felt.

Furthermore, the interface structure comprises a sliding block and connecting holes, wherein the sliding block is located in the middle of the width direction of the upper holding ring, the connecting holes are located on two sides of the sliding block, the sliding block is of a long strip-shaped structure which is arranged on the outer surface of the upper holding ring along the circumferential direction, and the opening directions of the connecting holes on two sides of the sliding block all indicate the circle center of the upper holding ring.

Furthermore, a circumferential sliding groove is arranged in the middle of the inner side surface of the arc plate in the width direction, and a plurality of circumferential strip holes are arranged on two sides of the sliding groove; the sliding block on the outer surface of the upper embracing ring is matched with the sliding groove on the inner side surface of the arc plate, so that the upper embracing ring and the arc plate are prevented from axial displacement, and the length of the sliding groove is greater than that of the sliding block; the long holes arranged on two sides of the sliding groove are correspondingly matched with the connecting holes on two sides of the sliding block on the outer surface of the upper embracing ring, the upper embracing ring and the mechanical arm arc plate can move relatively through the sliding block sliding groove, and the upper embracing ring and the mechanical arm arc plate can be fixed at a required position through a fastening bolt; the relative position of the mechanical arm can be realized by loosening the fastening bolt and adjusting the relative position of the strip hole and the connecting hole.

Furthermore, the mechanical arm can complete circumferential +/-6.5-degree adjustment.

Furthermore, in the roller assembly, a height adjusting structure at the upper part adopts a screw rod and slider structure, a radial thimble is arranged on the surface of a shell of the height adjusting structure, a key groove in the height direction is arranged on the side surface of a slider in the shell, and the key groove is matched with the thimble to limit the rotational freedom degree of the slider; the center of the sliding block is provided with an axial threaded hole, the center of the shell is provided with a screw rod, the screw rod is matched with the central axial threaded hole of the sliding block, and the axial movement of the sliding block is realized by rotating the screw rod; the gyro wheel is connected to the slider lower extreme, realizes the regulation of gyro wheel height to can accomplish the separation test with the guide rail cooperation.

Furthermore, the front hoop assembly and the rear hoop assembly are connected in a manner that three connecting rods are uniformly distributed along the circumferential direction, wherein one connecting rod is arranged at the center of the top of the upper hoop, and the other two connecting rods are arranged at two sides of the lower hoop; the connecting rods arranged at the two sides of the lower embracing ring are also used as mounting connecting pieces of the balance weight arc plates, the mounting positions of the balance weight arc plates and the gravity center position of the separation test device are in the same longitudinal plane, and the quality of the whole separation test device is adjusted by adjusting the number of the balance weight arc plates according to needs.

A method of conducting an interstage separation test using the separation test apparatus, comprising the steps of:

step 1: dropping a lower holding ring of the separation test device on the ground, limiting the lower holding ring to prevent the lower holding ring from rotating, and hoisting to drop the sub-stage engine into the lower holding ring;

step 2: the sub-engine is tightly held by the upper holding ring and the lower holding ring through elastic elements to form a test device assembly, and the sub-engine and the separation test device are connected into a whole through a rear connecting plate;

and step 3: hoisting the combination of the sublevel engine and the separation test device to connect the sublevel engine and the separation test device with a sublevel section:

loosening the connecting bolts on the arc plates and adjusting to a standing state; hoisting the assembly, circumferentially adjusting the whole assembly to complete the butt joint of the sub-engine and the stage section, adjusting the mechanical arm to a horizontal state, and fixing the arc plate;

and 4, step 4: adjusting the roller assembly, and dropping the roller onto the elevated guide rail;

and 5: interstage separation tests were completed.

Advantageous effects

The invention provides a solid rocket engine rear skirt connection mechanical arm type interstage separation test device and a method, wherein the separation test device is convenient and fast in that all assembly processes are on the ground, and the separation test device is hoisted after being assembled and is not required to be assembled at high altitude; secondly, all adjustments are integrated on the mechanical arm, so that the debugging is convenient, and the process time is greatly reduced; due to the existence of the rear connecting plate, the engine and tool assembly is ensured to be separated together; and finally, the total process flow is reduced, the overhead operation is reduced, the safety is improved, and the working efficiency is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1: the interstage separation test device is structurally schematic;

FIG. 2: FIG. 1 is a side view;

FIG. 3: a schematic structural diagram of a rear connecting plate;

wherein: 1. an upper embracing ring; 2. a mechanical arm; 3. a roller assembly; 4. an elastic element; 5. a lower embracing ring; 6. a connecting rod; 7. a rear connecting plate; 8. a counterweight arc plate;

FIG. 4: the combined structure of the mechanical arm and the roller assembly is schematic;

FIG. 5: FIG. 4 is a partial cross-sectional view;

FIG. 6: a robotic arm assembly schematic;

wherein: 10. a lower arc plate of the mechanical arm; 11. an upper embracing ring arc plate; 12. felt;

FIG. 7: a schematic view of an upper embracing ring;

FIG. 8: FIG. 7 is a side view;

FIG. 9: a lower arc plate schematic diagram of the mechanical arm;

FIG. 10: FIG. 9 is a side view;

FIG. 11: the testing device completes the circumferential adjustment schematic diagram;

FIG. 12: the original separation device is provided with a deformation schematic diagram of a separation engine; (a) before deformation and (b) after deformation.

Detailed Description

The invention mainly aims at requirements of an interstage separation test of a solid rocket engine with heavy sublevel weight and high speed, and provides a solid rocket engine rear skirt connecting mechanical arm type interstage separation test device and method.

The rear skirt is connected with the secondary engine, so that the problem that the secondary engine is separated from the separation tool and flies out directly due to insufficient friction force caused by high separation speed of the secondary engine is solved; the problem that the test tool deforms due to the fact that the mass of the engine is too large is solved in a mode of almost full-size enveloping; by means of a mechanical arm, the problem of circumferential butt joint of the test tool, the sub-stage assembly and the stage section is solved; the adjustment in the axial direction of the test device is completed in a threaded screw sleeve mode; adopt frame rack structure, use shaped steel in a large number, when guaranteeing use strength, reduce the quality of separation frock.

The structure of the mechanical arm type interstage separation test device connected with the rear skirt is shown in the figures 1 and 2 and comprises a front holding ring assembly, a rear holding ring assembly and a connecting rod.

Preceding embracing the major structure of ring subassembly and back embracing the ring subassembly the same, all including last embracing ring, lower embracing ring, arm and wheel components, the difference lies in that back embracing ring subassembly outer end welded fastening has the back connecting plate to form a whole, as shown in fig. 3, it has a plurality of connecting holes along circumference equipartition to open on the back connecting plate for connect the back skirt of sublevel engine, avoid appearing in the separation test process, factor level engine separation speed is great, and frictional force is not enough and leads to the direct problem of flying out of separation test device of sublevel engine. Furthermore, the connecting holes are long connecting holes, the length direction of the connecting holes is perpendicular to the connecting surface of the upper holding ring and the lower holding ring, and the upper holding ring and the lower holding ring can still be connected with the rear skirt of the secondary engine after being compressed.

Go up the armful ring with the armful ring can make up the connection down and hold the secondary engine tightly, and go up the armful ring and hold the intra-annular surface down and arranged elastic element, like the felt, both avoided going up the armful ring and hold down and hold the back and cause the damage to secondary engine surface tightly with holding down, can improve frictional force again. Through the mode that the upper embracing ring and the lower embracing ring are approximately full-size enveloping, the butt joint of the sub-engine and the separation test device can be completed on the ground, the sub-engine and the separation test device are hoisted to a separation plane after being integrated, the problem of difficult installation caused by local deformation of a test tool due to overweight of the sub-engine is avoided, meanwhile, the working steps are reduced through integral installation, hoisting and adjustment, the working difficulty is reduced, and the working efficiency is improved.

As shown in fig. 6 and 7, interface structures respectively connected with the mechanical arm are arranged on two circumferential sides of the outer surface of the upper embracing ring; the interface structure can cooperate with the arc plate structure at one end of the mechanical arm, so that the mechanical arm can move along the circumferential direction of the outer surface of the upper hoop through the arc plate structure and is fixed after moving in place. As shown in fig. 8, the interface structure includes a slider located in the middle of the upper clasping width direction and connecting holes located on two sides of the slider, the slider is a strip-shaped structure arranged on the outer surface of the upper clasping along the circumferential direction, and the opening directions of the connecting holes on two sides of the slider all point to the center of the upper clasping.

The mechanical arm mainly solves the problem that a combination body formed by the separation test device and the secondary engine is in circumferential butt joint with the secondary section, and the mechanical arm can be locked after moving in the circumferential direction of the upper lock ring, so that enough safety in the test is ensured. As shown in fig. 4, the mechanical arm at one side of the upper embracing ring is composed of an arc plate, a beam and a roller assembly, and the arc plate and the roller assembly are welded and fixed at two ends of the beam.

As shown in fig. 6, the inner side of the arc plate can be attached to the outer surface of the upper hoop. As shown in fig. 9 and 10, the arc plate is provided with a circumferential sliding groove at a middle position in the width direction of the inner side surface of the arc plate, and a plurality of circumferential elongated holes are arranged at two sides of the sliding groove.

The sliding block on the outer surface of the upper embracing ring is matched with the sliding groove on the inner side surface of the arc plate, so that the upper embracing ring and the arc plate are prevented from axial displacement, and the length of the sliding groove is greater than that of the sliding block; the long holes arranged on two sides of the sliding groove are correspondingly matched with the connecting holes on two sides of the sliding block on the outer surface of the upper embracing ring, the upper embracing ring and the mechanical arm arc plate can move relatively through the sliding block sliding groove, and the fixing at a required position is completed through the fastening bolt. The relative position of the mechanical arm can be realized by loosening the fastening bolt and adjusting the relative position of the strip hole and the connecting hole.

In the embodiment, the mechanical arm can complete circumferential +/-6.5-degree adjustment, and in the actual centering process, the relative deviation between the sublevel engine and the sublevel section is generally within 3 degrees, so that the test requirement can be completely met.

The roller assembly is a moving assembly of the separation test device. As shown in fig. 4 and 5, the roller assembly is composed of an upper height adjusting structure and a lower roller, the upper height adjusting structure adopts a screw slider structure, a radial thimble is arranged on the surface of a housing of the height adjusting structure, a key groove in the height direction is arranged on the side surface of a slider in the housing, and the key groove is matched with the thimble to limit the rotational freedom of the slider; and the center of the sliding block is provided with an axial threaded hole, the center of the shell is provided with a screw rod, the screw rod is matched with the central axial threaded hole of the sliding block, and the axial movement of the sliding block is realized by rotating the screw rod. The gyro wheel is connected to the slider lower extreme, realizes the regulation of gyro wheel height to can accomplish the separation test with the guide rail cooperation.

As shown in fig. 2, a plurality of connecting rods axially connect the front hoop assembly and the rear hoop assembly, so as to connect the front hoop assembly and the rear hoop assembly into a whole. In this embodiment, embrace the ring subassembly before adopting three connecting rods to connect along the mode of circumference equipartition and embrace the ring subassembly after with, one of them arranges at last armful top central point and puts, and two other arrange under and embrace the ring both sides. The connecting rods arranged at the two sides of the lower embracing ring are also used as mounting connecting pieces of the balance weight arc plates, the mounting positions of the balance weight arc plates and the gravity center position of the separation test device are in the same longitudinal plane, and the quality of the whole separation test device is adjusted by adjusting the number of the balance weight arc plates according to needs.

Compared with the conventional test device, the separation test device is greatly different, the separation test device is always kept in the separation process of the engine except for the increase of the rear connecting plate, all adjustment in the interstage separation process is concentrated on the upper half part, namely the upper hoop, the mechanical arm and the combination body of the roller components, by means of setting the adjusting mechanical arm, so that adjustment links are reduced, and the working efficiency is improved. When in butt joint, the separation test device can realize the butt joint of the separation engine and the stage section by adjusting the combination; the old device can only be adjusted the engine first, then assemble the separator, the process is complicated.

The specific implementation process of the invention is as follows:

step 1: the lower embracing ring of the separation test device is fallen on the ground, the lower embracing ring is limited by two sleepers so as not to rotate, and the sub-stage engine is hoisted to fall into the lower embracing ring;

step 2: the sub-engine is tightly held by the upper holding ring and the lower holding ring through felts to form a test device assembly, and the sub-engine and the test device are connected into a whole through a rear connecting plate;

and step 3: and hoisting the combination of the secondary engine and the test device to connect the secondary engine and the test device with the stage section. The main process is as shown in fig. 11, the mechanical arm is adjusted to a set-up state from the left state of fig. 11 by loosening the connecting bolt on the arc plate, the assembly is hoisted as shown in the middle state of fig. 11, the whole assembly is circumferentially adjusted to complete the butt joint of the sublevel engine and the sublevel section, and then the mechanical arm is adjusted to a horizontal state as shown in the right state of fig. 4;

and 4, step 4: adjusting the roller assembly, and dropping the roller onto the elevated guide rail;

and 5: interstage separation tests were completed.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.