JPS62292599A - Assembly facility for segment coupling type rocket motor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to assembly equipment for a segment-coupled rocket motor, particularly for use in ground combustion tests. The present invention relates to an assembly facility in which each segment of a rocket motor is sequentially hung into an assembly tower and connected vertically to assemble the rocket motor, and the assembled rocket motor is overturned sideways.

(Conventional technology) Large rocket motors rely on the gravity of their manufacturing equipment and transportation vehicles,
Furthermore, due to various restrictions such as laws and regulations regarding the transportation of explosives, the rocket motor is manufactured in segment form by dividing it in the axis direction at the manufacturing factory, and these segments are transported to a test site or launch site and assembled on site.

However, in a large rocket motor, each segment is quite heavy, so it is extremely difficult to connect these segments horizontally with precision. Therefore, an assembly tower is installed on site, and the segments are vertically hung and installed therein, and the next segment is placed on top of the tower and assembled from below while connecting each other. In this way, the joint surfaces of each segment will adhere evenly due to their own gravity.

Since the coupling means such as coupling bolts can be easily fastened, the centering of the rocket motor can be performed accurately and without difficulty.

On the other hand, since ground combustion tests for rocket motors are conventionally conducted by placing the test motor horizontally to measure thrust and other performance, the test site uses a rocket motor that was assembled vertically as described above, and then horizontally. Is it necessary to turn it over?

The assembly equipment with the above maneuverability is published, for example, in the Report of the Institute of Aerospace Exploration, the University of Tokyo, Volume 8, No. 3 (B), Special Issue on Ground Combustion Experiments (September 1972), and Figure 6 shows this. This is a summary.

In the figure, reference numeral R designates a rocket motor to be subjected to a ground combustion test, which is divided into, for example, four segments S1 to S4 and transported to the test site. An assembly tower 1 is installed at the test site, and a cradle 2 is also prepared. The cradle 2 has a frame 3, a base panel 4 raised from one end of the frame, and a pivot 5 protruding from the base panel on both sides. Wire ropes 9 are supported by a pair of bosses 6 erected inside, and are attached to a sheet block 7 attached to both sides of the tip of the frame 3 and a sheave group 8 supported at the top of the assembly tower l.
By winding the wire rope with a winch lO, the cradle 2 is raised and pulled into the assembly tower 1, and fixed in a vertical position as shown by the two-dot chain line. Then, for example, the frontmost segment St is hung vertically by a crane 11 at the top of the assembly tower, fixed aM on the base panel 4, and fastened to the frame 3 using a fastening means such as a hand. Next, the second segment S2 is suspended in the same manner, placed on the segment St, and both are coupled and fastened to the frame 3. In the same way, the segment S3 and finally the rearmost segment S4, which has the nozzle N, are successively suspended, connected, and fastened.
Assemble the rocket motor R as shown by the dotted line.

After the assembly is completed, the wire rope 9 is gradually unwound using the winch lO, and the rocket motor R, while being fastened to the cradle 2, falls around the pivot 5 as shown by the solid line, and finally the test It is mounted on a roller truck 13 on rails 12. Thereafter, the post 6 is removed to make the cradle 2 freely movable, and the front end of the rocket motor is connected to the thrust block 14 via an adapter and a load cell (not shown).

[Problem that the invention attempts to solve]

However, such conventional assembly equipment has a problem in that its workability is extremely low, especially when it falls over, and this creates a bottleneck in the test preparation stage. The reason for this is explained below.

As the rocket motor R is overturned as shown by the solid line in Fig. 6, a bending load in the overturning direction is applied to the assembly tower L due to the weight of the motor and the cradle, and part of this bending load is This is offset by the tension in the wire rope from the winch IO to the sheave group 8.

For some structures such as towers, it is relatively easy to ensure the strength to withstand vertical loads, but when trying to withstand large bending moments, the tower itself becomes a large-scale structure, which increases construction costs. In addition to the huge size, combustion test sites for large rockets are usually set up in low-lying areas on the coast, so ground conditions are often not ideal.

Therefore, in order to reduce the bending load acting on the assembly tower l and its foundation ground as much as possible, the winch lO is pulled away from the assembly tower to reduce the angle of attack θ of the wire rope from the winch. The amount of compensation for bending load is increased as much as possible. However, if this is done, the winch operator will not be able to visually recognize the overturned state of the rocket motor, so a work signal from a specific commander will be required. If this work signal and winch operation do not work together, it may cause great harm to people and property, so these coordinated operations must be carried out carefully and over a long period of time by a highly skilled person, repeating inching operations. It will be done. As a result, this becomes a major time bottleneck in the exam preparation schedule.

Therefore, an object of the present invention is to enable the tipping work to be carried out safely and efficiently.

(Means for Solving the Problems) The means of the present invention that solves the above problems consists of a rail laid parallel to the overturning locus of the rocket motor, a running bogie placed on the rail, and a running bogie built on the running bogie. It is equipped with an assembly tower.

(Function) According to the above means, since the assembly tower is on a traveling carriage and can move parallel to the falling locus of the rocket motor, one end of the rocket motor is supported on the post as described above and is caused to fall. In this case, the operator can control the movement of the other end at the tower site by lowering the other end using a lifting crane and moving the trolley according to the lateral displacement of the other end. The above-mentioned operations for rolling down and running can be performed without visually recognizing the overturning condition.

〔Example〕

FIGS. 1 and 2 are general views of the assembly equipment showing an embodiment of the present invention, in which the rocket motor R is vertically aligned along the cradle 3o that has been pulled into the assembly tower 20 and erected. The assembly is then turned over to the front (right side in FIG. 1) as shown by the two-dot chain line in FIG. 1, and placed horizontally.

Two crane rails 41 are installed on the foundation 40 of the test site.
are laid parallel to the above-mentioned falling trajectory, that is, in the left-right direction (back-and-forth direction) in Fig. 1, and the traveling bogie 5 is placed on these rails.
0 to a21, and the assembly tower 20 is constructed on the saddle 51 of the truck.

As shown in FIG.
and a driven bogie 53, and a rocker 55 mounted on the center of each of these bogies via a low lock 54, 54, and the center of this rocker is connected to the saddle 51 using a center pin 56. It is. Also, the driving bogie 52
is equipped with a pair of drive wheels 58.58 supported on the bogie frame 57, wheel gears 59.59 fastened to these drive wheels, and an idler gear 60 that links these wheel gears. A traveling motor 61 with a speed reducer is attached to the side, and its motor pinion 62 is meshed with one of the wheel gears 59. As the traveling motor 61, a wound type induction motor having a large starting torque, such as a crane specification, is used. This type of motor responds well to the inching operation described below, and by inserting a common resistance in the rotor windings of multiple motors, it is possible to make the rotational speeds the same even if the loads are different among the motors. This allows for smooth running.

The driven bogie 53 includes a driven wheel 64, 64 supported on the bogie frame 63, and a rail clamper 65 attached to the bogie frame.
When the threaded rod 66 is rotated manually or by power, a pair of clamp arms 67, 67 clamps both sides of the rail 41, making it impossible to run. Configurations of 0 or more are for both front and rear sides of each saddle 51, 51. The same applies to

The main body of the assembly tower 20 consists of two upright pillars 21 erected on each saddle 51.51, and as shown in No. 21:A, two oblique upright pillars 21 and 21 are respectively installed obliquely to the rear upright pillars 21.21. The pillars 22.22 are connected to each other by a truss structure, and the upper ends of the diagonal pillars 22.22 are firmly connected using an arch-shaped connection member 23. Therefore, when the assembly tower 20 is viewed from the rear, it has a circular shape that extends all the way to the connection member 23.

On the main body of the assembly tower 20, a pair of crane garters 24, 24 extending to the rear of the main body are installed opposite each other, and a trolley rail is attached to these crane garters in the same direction as the L/-ru 41. Lay 25°25 and these rails L
A trolley crane 70 will be installed on the.

As shown in FIG. 2, the assembly tower 20 has flip-up work floors 26a to 2 disposed at appropriate positions in the height direction.
6d and step 27 to ascend to these working floats.
, a traveling motor 61, and a trolley crane 70. In addition, a cabtire processing device 2 for laying and rolling up cabtires for power supply to work equipment as the vehicle travels.
8th class or attached. These auxiliary devices are not shown in FIG. 1 to avoid complexity.

The trolley crane 70 includes a trolley 72 that is driven by a trolley motor 71 (FIG. 1) and runs on the trolley rail 25, and a hoisting tram 74 that is on the trolley and is driven by a hoisting motor 73. Then, the two wire ropes 76 pulled out from the equalizer block 75 are wound around the sheave of the four-sheave type funnel block 77 and the intermediate sheave 78 supported on the trolley 72, and then wound onto the hoisting tram 74. This relates to a known configuration as described above.

FIG. 4 shows a side-pull prevention device 80 attached to this trolley crane, in which an inverted T-shaped pendulum 82 is supported on a mounting bracket 81 of a limit switch 79 that regulates the upper limit position of hoisting the load block 77. Shoes 83° 83 are fixed on both sides of the pendulum 82 to face the wire lobe 76 wound from the intermediate sheave 78 to the rotor block sheave, and limit switches 84° are fixed on both sides of the pendulum 82. 84 are installed.

This device consists of either the rotor flock 77 or the assembly tower 20.
When the pendulum 82 is pulled laterally in the running direction, the pendulum 82 comes into contact with the wire rope 76 or the shoe 83 to tilt the pendulum 82, and when this tilt angle exceeds a predetermined value, the limit switch 84 is closed. This closure activates an alarm to give a warning to the operator, or further stops the operation of the lifting motor 73 of the trolley crane.

The cradle 30 is attached to the frame 3 similar to that in FIG.
1 and a base panel 32 from which a pivot 33 projects, a pair of flakets 34 are erected on the opposite side of the base panel, and lifting pins 35 are made to project from both sides.

Further, a pair of posts 42° 42 are erected on the base 1i 340, and a pivot receiver 43 whose upper and front sides are open is formed at the upper end of the posts, and a pivot cover 44 is further provided to cover the upper part of the pivot receiver. It is installed.

The embodiment is as described above.

A rail 41 and two test rails 45.45 (Fig. 2) are laid on the foundation 40, and a roller truck 46 is installed on these test rails, and a thrust flock 47 is installed in front of it. Then, the load cell 48 described above is attached to this. These testing devices are similar to conventional ones.

Next, an assembly procedure using the above embodiment will be explained.

First, as shown by the two-dot chain line in FIG.
is horizontally placed between the post 42 and the thrust flock 47, its pivot 33 is engaged with the pivot receiver 43, and its upper part is covered with a pivot cover 44 to prevent upward movement. Next, the assembly tower 20 is moved forward to bring the rotor flock 77 directly above the lifting pin 35 of the cradle, and while the lifting pin is lifted by the trolley crane 70, the assembly tower 20 is moved backward to place the cradle 3
0 as shown by the solid line, and then move the trolley crane 7 upright as shown by the solid line.
The cradle 30 is made to stand upright while the assembly tower 20 is inching, and this position is maintained by the stay 36. Here, the rail clamper 65 (Fig. 3)
By operating the rails 41 and compressing them, the assembly tower 20 is fixed so that it will not move even if it is exposed to crosswinds.

The rearmost segment S4 of the location motor R is transported to the rear of the assembly tower 20. This segment S4 is brought in in a package with a set γ adapter A that surrounds the nozzle N and a transportation cover B that covers the opposite side. The trolley crane 70 is moved backward, and the segment S4 is lifted by hanging the transport cover B with a lobe. Next, after moving the trolley crane forward, the assembly attacher A is wound onto the base panel 32 of the cradle and fixed thereto, and the segment S4 is fastened using a fastening hunt (reference numeral 37 with two-point buttons). It is fastened to the frame 31 of the dollar. Remove transportation cover B. Similarly, the segments S3, S2, and Sl are successively suspended into the assembly tower 20, and the segments are connected and fastened to the cradle 30 in the same manner as in the conventional procedure to assemble the rocket motor R. Then, attach a thrust adapter (symbol C indicated by a two-dot chain line) to the front end of the rocket motor.

Once the rocket motor R is assembled in this manner, the hanger 85 is attached to the load flock 77 and is engaged with the lifting pin 35 of the cradle. While holding the cradle 30 slightly lifted, the stay 36 is removed and the rail clamper 65 is released. Then, one operator positions himself on the tower side and moves the assembly tower 20 forward while simultaneously rolling the load flock 77 downward. As a result of this operation, as shown in FIG. 5, the cradle 30 to which the rocket motor R is fastened falls forward about the pivot 33, and finally assumes a horizontal position as shown by the two-dot chain line in FIG. Then, it is placed on the roller cart 46. This overturning operation is performed by the operator, who visually checks the behavior of the front end of the cradle, and adjusts the traveling distance of the assembly tower 20 and the hoisting distance of the trolley crane 70 in a related manner, including inching operations, in order to move the chain directly downward. It is carried out. If this adjustment operation is malfunctioning, the lateral pulling prevention device 80 will be activated and a warning will be issued, or the hoisting operation will be stopped, so the hoisting position or traveling position is corrected and the work is continued again. do.

As described above, the assembly of the cradle 30 and the rocket motor R placed on the roller truck 46 is moved forward to connect the thrust adapter C to the load cell 48.

(Effects) As explained above, according to the present invention, when tipping a rocket motor, the operator can proceed with the work while directly visualizing the tipping state, so even delicate adjustments can be made appropriately and easily. As a result, both safety and scrapped vehicles are ensured. Furthermore, according to the present invention, since almost no bending load from the rocket motor acts on the assembled tower, the structure of the tower itself can be simplified, and the ground conditions can be relaxed, thereby expanding the range of choices for test site installation locations. Vine.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of the assembly equipment showing one embodiment of the present invention, Fig. 2 is a rear view of Fig. 1 viewed from the arrow ``■'', and Fig. 3 is a schematic view of Fig. 2 viewed from the arrow ``■''. Figure 4 is an enlarged side view of the
FIG. 5 is an enlarged cross-sectional view of the main part when viewed from the arrow line ■-■, FIG. 5 is an explanatory diagram of the operation of the present invention, and FIG. 6 is an overall side view illustrating the conventional assembly equipment. 20... Assembly tower 30... Cradle 33... Pivot (center of falling) 41... Rail 50... Traveling trolley 61... Traveling motor 70... Trolley crane R-... Rocket motor St~S4-...Segment

Claims (1)

[Claims] Assembly equipment that assembles the rocket motor by sequentially suspending each segment of a rocket motor divided into a plurality of segments into an assembly tower, connecting them vertically, and then overturning the assembled rocket motor sideways. , an assembly facility for a segment-coupled rocket motor is provided with a rail laid parallel to the falling locus of the rocket motor, a traveling bogie placed on the rail, and an assembly tower constructed on the traveling bogie.