Solid engine placement state changing device

Abstract

The invention discloses a solid engine placement state changing device. The solid engine placement state changing device comprises a base, a first rolling supporting assembly, a second rolling supporting assembly and two tension bands. When the solid engine placement state changing device is used for changing the placement state of the solid engine, the two hoops are arranged on the solid engine in a sleeving mode, and the solid engine can be supported by the two first rolling supporting assemblies and the two second rolling supporting assemblies; the first supporting wheels are arranged at the ends of the two first supporting rods respectively, the second supporting wheels are arranged at the ends of the two second supporting rods respectively, rolling friction force exists between the solid engine and the first supporting wheels and between the solid engine and the second supporting wheels, the friction force is greatly reduced, the solid engine can be rotated by applying small force to the solid engine, and therefore the solid engine can rotate conveniently. By means of the solid engine placement state changing device, state changing of a large-diameter and large-weight solid rocket engine can be safely and easily achieved.

Description

Technical Field

[0001] The present application relates to the technical field of solid rocket engine manufacturing tooling, and in particular to a solid engine placement state changing device. Background Art

[0002] During the accelerated thermal aging test of solid rocket engines, in order to comprehensively evaluate the stability of the combustion chamber grain, the placement state of the solid rocket engine needs to be changed regularly to obtain the change pattern of the grain performance with aging time.

[0003] In the process of changing the placement state of solid rocket engines, due to the large diameter and mass of some solid rocket engines, it is impossible to complete the change by the traditional method of placing them on the arc seat and rotating them manually. Since the aging test has strict requirements on the time of the solid rocket engine changing state process, the existing method of rotating by manpower often causes the solid rocket engine to fail to complete the change of placement state within the required time. In addition, the use of a sling to flip the solid rocket engine by a crane can easily cause friction between the solid rocket engine and the iron arc seat, which can easily lead to quality and safety accidents. Therefore, a device for changing the placement state of solid rocket engines is needed for large-diameter and heavy-weight solid rocket engines. Summary of the invention

[0004] The embodiment of the present application provides a solid engine placement state changing device, which can solve the technical problems in the prior art that the placement state of a large-diameter and heavy solid engine is difficult to change and requires a lot of manpower. The technical solution is as follows:

[0005] A solid engine placement state changing device, the solid engine is cylindrical, and the solid engine placement state changing device comprises: a base; a first rolling support assembly, fixedly connected to the upper surface of the base, comprising two first support rods in a common first plane, one end of each of the first support rods is fixedly connected to the base, and the other end is rotatably connected to a first support wheel; a second rolling support assembly, fixedly connected to the upper surface of the base, comprising two second support rods in a common second plane, one end of each of the second support rods is fixedly connected to the base, and the other end is rotatably connected to a second support wheel; and two hoops, the two hoops are used to be sleeved on the solid engine; the two circumferential edges on the outer peripheral surface of the hoop respectively have flanges extending radially outward; wherein the first plane and the second plane are parallel; the spacing between the two first support wheels is smaller than the diameter of the solid engine, and the spacing between the two second support wheels is smaller than the diameter of the solid engine; the two hoops are respectively placed on the first rolling support assembly and the second rolling support assembly.

[0006] Optionally, the hoop includes two semicircular ring-shaped hoops and a connecting piece for connecting the two semicircular ring-shaped hoops into a full-circular ring shape, and the inner diameter of each of the semicircular ring-shaped hoops is equal to the diameter of the solid engine;

[0007] Optionally, each of the semicircular ring-shaped clamps is provided with a traction portion, and the traction portion is used to cooperate with an external tool to apply force to the traction portion so that the semicircular ring-shaped clamp drives the solid engine to rotate.

[0008] Optionally, the traction portion is a traction ring arranged on the semicircular ring hoop.

[0009] Optionally, the solid engine placement state changing device also includes a braking device, and the braking device is used to brake the solid engine.

[0010] Optionally, the braking device includes a jack and an arc-shaped brake pad, the cylinder of the jack is fixedly connected to the base, and the end of the piston rod of the jack is rotatably connected to the arc-shaped brake pad.

[0011] Optionally, the inner diameter of the arc-shaped brake pad is larger than the diameter of the solid motor.

[0012] Optionally, the base is an I-shaped bracket, which includes two first bottom plates and a second bottom plate parallel to each other, and a connecting plate connecting the first bottom plate and the second bottom plate; one end of the two first support rods is fixedly connected to the first bottom plate, and one end of the two second support rods is fixedly connected to the second bottom plate.

[0013] Optionally, the angles between the two first support rods and the first base plate are equal and acute angles, and the inclination directions of the two first support rods are both toward the middle of the first base plate; the angles between the two second support rods and the second base plate are equal and acute angles, and the inclination directions of the two second support rods are both toward the middle of the second base plate.

[0014] Optionally, the solid engine placement state changing device further includes a liner, which is arranged on the inner side of the semicircular ring hoop.

[0015] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0016] A solid engine placement state changing device comprises: a base, a first rolling support assembly, a second rolling support assembly and two hoops. When the solid engine placement state changing device of the present application is used to change the placement state of the solid engine, the two hoops are sleeved on the solid engine so that the spacing between the two hoops is equal to the spacing between the first rolling support assembly and the second rolling support assembly, and the solid engine with the hoops is placed on the first rolling support assembly and the second rolling support assembly. Since the two first support rods and the two second support rods can support the solid engine, and the ends of the two first support rods are respectively provided with first support wheels, and the ends of the two second support rods are respectively provided with second support wheels, there is rolling friction between the solid engine and the first support wheels and the second support wheels, and the friction is greatly reduced. The solid engine can be rotated by applying a small force to the solid engine. Therefore, the solid engine placement state changing device of the present application can safely and easily realize the state change of large-diameter and heavy-weight solid rocket engines. Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a three-dimensional schematic diagram of a solid engine placement state changing device provided in an embodiment of the present application;

[0019] Figure 2 is an exploded view of a solid engine placement state changing device provided in an embodiment of the present application;

[0020] Figure 3 is a top view of a solid engine placement state changing device provided in an embodiment of the present application;

[0021] Figure 4 is an exploded view of a hoop in a solid engine placement state changing device provided in an embodiment of the present application;

[0022] Figure 5 It is a side view of a base and a braking device in a solid engine placement state changing device provided in an embodiment of the present application;

[0023] Figure 6 It is a three-dimensional diagram of the base and the braking device in the solid engine placement state changing device provided in an embodiment of the present application.

[0024] Description of Reference Numerals

[0025] 1-solid engine; 2-base; 201-first bottom plate; 202-second bottom plate; 203-connecting plate; 3-first rolling support assembly; 301-first support rod; 302-first support wheel; 4-second rolling support assembly; 401-second support rod; 402-second support wheel; 5-hoop; 501-flange; 502-semicircular ring hoop; 503-connecting piece; 504-traction part; 6-braking device; 601-jack; 602-arc brake pad; 7-pad; S1-first plane; S2-second plane. DETAILED DESCRIPTION

[0026] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0027] In the present disclosure, unless otherwise stated, directional words such as "upper" and "lower" generally refer to the "upper" and "lower" of the corresponding parts in the use state relative to the direction of gravity, and "inside" and "outside" refer to the "inside" and "outside" relative to the corresponding parts' own contours. In addition, the terms "first", "second", etc. used in the present disclosure are to distinguish one element from another and do not have order and importance. In the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements.

[0028] refer to Figure 1 and Figure 2 The solid engine 1 of the rocket is cylindrical. In order to comprehensively evaluate the stability of the combustion chamber grain, the placement state of the solid rocket engine 1 needs to be changed regularly to obtain the change law of the grain performance with aging time.

[0029] In the related technology, the technical solution adopted is to transfer the solid engine from the temperature environment test chamber to the crane under the crane in a short time, and then use the wrapped hoist to lift the solid engine at one point to complete the engine rotation. After the rotation operation is completed, the engine is put into storage again for subsequent testing. The whole operation process takes at least 20 minutes, which is a certain gap from the designer's requirement to complete the state conversion of the accelerated aging engine in the shortest possible time. In terms of personnel arrangement, because the transfer and rotation process is required to be completed in a short time, it usually requires a crane driver, a crane commander, two people driving the transfer vehicle, and two people installing the hoist. A total of at least six people are required to cooperate with each other to complete the engine rotation operation. Since the engine rotation frequency in the accelerated aging test process is high and the time and task of each rotation are tight, the quality requirements of the six staff members are high, and professional training is required to complete this work. In terms of on-site operations, it is time-consuming and laborious for personnel to operate without special tooling, and the cost of coordination and communication for multiple people is high. The transfer time cannot be quantified, which cannot meet the current situation and task requirements for large-scale accelerated aging tests of solid rocket engines. In terms of safety assurance, there are no special tooling during the transfer and rotation operation, which causes the solid rocket engine to easily scratch the iron arc seat during rotation. At the very least, the outer skin of the engine is damaged, and at worst, the scratches are so deep that the engine cannot be used. In extreme cases, static electricity generated by friction may even cause the engine to explode, leading to a major safety accident.

[0030] According to the embodiments of the present application, reference Figure 1 to Figure 2 A solid engine placement state changing device includes: a base 2, a first rolling support assembly 3, a second rolling support assembly 4, and two hoops 5.

[0031] refer to Figure 3 , wherein the first rolling support assembly 3 is fixedly connected to the upper surface of the base 2, and the first rolling support assembly 3 may include two first support rods 301 that are in the same first plane S1, one end of each first support rod 301 is fixedly connected to the base 2, and the other end is rotatably connected to the first support wheel 302; the second rolling support assembly 4 is fixedly connected to the upper surface of the base 2, and the second rolling support assembly 4 may include two second support rods 401 that are in the same second plane S2, one end of each second support rod 401 is fixedly connected to the base 2, and the other end is rotatably connected to the second support wheel 402. Reference Figure 3, wherein the first plane S1 is a plane passing through the two first support rods 301, the second plane S2 is a plane passing through the two second support rods 401, and the first plane S1 and the second plane S2 are parallel. In this way, the axles of the two first support wheels 302 and the axles of the two second support wheels 402 are parallel to each other. The two hoops 5 are used to be sleeved on the solid engine 1; the spacing between the two first support wheels 302 is smaller than the diameter of the solid engine 1, and the spacing between the two second support wheels 402 is smaller than the diameter of the solid engine 1; the two hoops 5 are respectively placed on the first rolling support assembly 3 and the second rolling support assembly 4. In this way, the two first support wheels 302 and the two second support wheels 402 can form four support points to support the solid engine 1. The two circumferential edges on the outer circumference of the hoop 5 respectively have flanges 501 extending radially outward. In this way, the first support wheel 302 and the second support wheel 402 can be located between the two flanges 501 of each hoop 5, thereby preventing the solid engine 1 from moving in the axial direction.

[0032] In the embodiment of the present application, two hoops 5 are sleeved on the solid engine 1, so that the distance between the two hoops 5 is equal to the distance between the first rolling support assembly 3 and the second rolling support assembly 4, and the solid engine 1 with the hoops 5 is placed on the first rolling support assembly 3 and the second rolling support assembly 4. Since the two first support rods 301 and the two second support rods 401 can support the solid engine 1, and the ends of the two first support rods 301 are respectively provided with first support wheels 302, and the ends of the two second support rods 401 are respectively provided with second support wheels 402, there is rolling friction between the solid engine 1 and the first support wheels 302 and the second support wheels 402, and the friction is greatly reduced. The solid engine 1 can be rotated by applying a small force to the solid engine 1. Therefore, the solid engine placement state change device of the present application can safely and easily realize the state change of large-diameter and heavy-weight solid rocket engines.

[0033] According to the embodiments of the present application, reference Figure 4 Each hoop 5 may include two semicircular ring hoops 502 and a connector 503 for connecting the two semicircular ring hoops 502 into a full ring. The inner diameter of each semicircular ring hoops 502 is equal to the diameter of the solid engine 1. The edge of the outer peripheral surface of the semicircular ring hoops 502 has two flanges 501 extending radially outward. Splitting the hoop 5 into two semicircular ring hoops 502 can facilitate the staff to put the hoop 5 on the solid engine 1 during actual operation. The two semicircular ring hoops 502 are connected by the connector 503. The connector 503 can be a bolt and a nut. Accordingly, a connection hole is provided at the end of each semicircular ring hoops 502.

[0034] According to the embodiments of the present application, reference Figure 4Each semicircular ring clamp 502 may be provided with a traction portion 504, and the traction portion 504 is used to cooperate with an external tool to apply force to the traction portion 504 so that the semicircular ring clamp 502 drives the solid engine 1 to rotate. In this way, it is convenient for the staff to use an external tool to apply a rotational force to the semicircular ring clamp 502. The external tool can be a hook, a wrench or a crank, and the staff can select a suitable external tool according to the actual situation.

[0035] In one embodiment of the present application, the traction portion 504 is a traction ring arranged on the semicircular ring clamp 502. The staff can use a hook to hook into the traction ring and apply a pulling force tangentially along the solid engine 1 to rotate the solid engine 1.

[0036] According to the embodiments of the present application, reference Figure 5 In order to reliably fix the engine under test, the solid engine 1 placement state changing device may further include a braking device 6, which is used to brake the solid engine 1.

[0037] According to the embodiments of the present application, reference Figure 5 The braking device 6 includes a jack 601 and an arc-shaped brake pad 602. The cylinder of the jack 601 is fixedly connected to the base 2, and the end of the piston rod of the jack 601 is rotatably connected to the arc-shaped brake pad 602. In this case, when the solid engine 1 needs to be rotated, the piston rod of the jack 601 is retracted, and the piston rod drives the arc-shaped brake pad 602 to leave the semicircular ring hoop 502. When the solid engine 1 is rotated into place and needs to be fixed, the piston rod of the jack 601 is lifted up, and the piston rod drives the arc-shaped brake pad 602 to approach the semicircular ring hoop 502 and press against the outer surface of the semicircular ring hoop 502, thereby braking the solid engine 1, and the solid engine 1 remains fixed to the base 2 under the action of its own gravity.

[0038] According to the embodiments of the present application, reference Figure 5 In order to make the arc-shaped brake pad 602 reliably contact with the semicircular ring hoop 502 and increase the contact area, the inner diameter of the arc-shaped brake pad 602 can be larger than the diameter of the solid engine 1, and the inner diameter of the arc-shaped brake pad 602 can also be greater than or equal to the diameter of the semicircular ring hoop 502.

[0039] According to the embodiments of the present application, reference Figure 6The base 2 is an I-shaped bracket, which includes two mutually parallel first bottom plates 201 and second bottom plates 202, and a connecting plate 203 connecting the first bottom plates 201 and the second bottom plates 202; one end of the two first support rods 301 is fixedly connected to the first bottom plate 201, and one end of the two second support rods 401 is fixedly connected to the second bottom plate 202. The I-shaped base 2 is simple in construction and can meet the basic requirements of stable support of the base 2. The first bottom plate 201, the second bottom plate 202 and the connecting plate 203 can all be made of channel steel, and the I-shaped bracket is formed by welding.

[0040] According to the embodiments of the present application, reference Figure 6 The angles between the two first support rods 301 and the first bottom plate 201 are equal and acute, and the inclination directions of the two first support rods 301 are both toward the middle of the first bottom plate 201; the angles between the two second support rods 401 and the second bottom plate 202 are equal and acute, and the inclination directions of the two second support rods 401 are both toward the middle of the second bottom plate 202. With such a design, the force on the base 2 can be more uniform and the structure can be more stable.

[0041] According to the embodiments of the present application, reference Figure 2 The solid engine 1 placement state changing device further includes a liner 7, which is arranged on the inner side of the semicircular ring hoop 502. The liner 7 can be made of felt, which is pasted on the inner surface of the hoop 5. On the one hand, it can prevent the semicircular ring hoop 502 made of metal from directly contacting the solid engine 1 and scratching the surface of the solid engine 1. On the other hand, the friction force generated by the clamping of the felt and the solid engine 1 can ensure that there is no relative displacement between the solid engine 1 and the semicircular ring hoop 502 during the rotation process.

[0042] refer to Figures 1 to 6 The working principle of the solid engine 1 placement state changing device is explained below in combination with actual usage scenarios:

[0043] In the initial state, a gasket 7 is pasted inside each semicircular ring hoop 502;

[0044] Step 1: Place a semicircular ring hoop 502 on the two first support wheels 302, and place another semicircular ring hoop 502 on the two second support wheels 402;

[0045] Step 2: hoisting and placing the solid engine 1 on the two semicircular ring hoops 502 in step 1;

[0046] Step 3: Connect the two semicircular ring hoops 502 to the two semicircular ring hoops 502 in step 1 respectively by bolts and nuts;

[0047] Step 4: moving the solid engine 1 placement state changing device assembled with the solid engine 1 into the test environment as a whole to perform a thermal aging test;

[0048] Step 5: When the solid engine 1 needs to be rotated, the piston rod of the jack 601 is retracted to separate the arc-shaped brake plate from the semicircular ring hoop 502, and a hook is hooked into the traction ring to apply a pulling force along the tangential direction of the solid engine 1 to rotate the solid engine 1;

[0049] Step 6: When the solid engine 1 is rotated into position, the piston rod of the jack 601 is extended, and the arc-shaped brake plate is pressed against the outer surface of the semicircular ring hoop 502, and the solid engine 1 is braked.

[0050] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0051] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0052] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A device for changing the placement state of a solid engine, wherein the solid engine (1) is cylindrical and characterized in that: The solid engine (1) placement state changing device comprises: Base (2); A first rolling support assembly (3) is fixedly connected to the upper surface of the base (2), and comprises two first support rods (301) that are located in the first plane (S1), one end of each of the first support rods (301) is fixedly connected to the base (2), and the other end is rotatably connected to a first support wheel (302); A second rolling support assembly (4) is fixedly connected to the upper surface of the base (2), and comprises two second support rods (401) coexisting in the second plane (S2), one end of each second support rod (401) being fixedly connected to the base (2), and the other end being rotatably connected to a second support wheel (402); and two hoops (5), the two hoops (5) being used for being sleeved on the solid engine (1); two circumferential edges on the outer circumference of the hoops (5) respectively having flanges (501) extending radially outward; The first plane (S1) and the second plane (S2) are parallel; the distance between the two first support wheels (302) is smaller than the diameter of the solid engine (1), and the distance between the two second support wheels (402) is smaller than the diameter of the solid engine (1); and the two hoops (5) are respectively placed on the first rolling support assembly (3) and the second rolling support assembly (4).

2. The solid rocket engine placement state changing device according to claim 1, characterized in that: The hoop (5) comprises two semicircular ring-shaped hoops (502) and a connecting piece (503) for connecting the two semicircular ring-shaped hoops (502) into a full-circular ring shape, and the inner diameter of each semicircular ring-shaped hoops (502) is equal to the diameter of the solid engine (1).

3. The solid rocket engine placement state changing device according to claim 2, characterized in that: Each of the semicircular ring-shaped clamps (502) is provided with a traction portion (504), and the traction portion (504) is used to cooperate with an external tool to apply force to the traction portion (504) so ​​that the semicircular ring-shaped clamp (502) drives the solid engine (1) to rotate.

4. The solid rocket engine placement state changing device according to claim 3, characterized in that: The traction portion (504) is a traction ring arranged on the semicircular ring hoop (502).

5. The solid rocket engine placement state changing device according to claim 1, characterized in that: The solid engine placement state changing device further comprises a braking device (6), and the braking device (6) is used for braking the solid engine (1).

6. The solid rocket engine placement state changing device according to claim 5, characterized in that: The braking device (6) comprises a jack (601) and an arc-shaped brake pad (602); the cylinder of the jack (601) is fixedly connected to the base (2); and the end of the piston rod of the jack (601) is rotatably connected to the arc-shaped brake pad (602).

7. The solid rocket engine placement state changing device according to claim 6, characterized in that: The inner diameter of the arc-shaped brake pad (602) is greater than the diameter of the solid engine (1).

8. The solid rocket engine placement state changing device according to claim 1, characterized in that: The base (2) is an I-shaped bracket, comprising two mutually parallel first bottom plates (201) and a second bottom plate (202), and a connecting plate (203) connecting the first bottom plate (201) and the second bottom plate (202); one end of the two first support rods (301) is fixedly connected to the first bottom plate (201), and one end of the two second support rods (401) is fixedly connected to the second bottom plate (202).

9. The solid rocket engine placement state changing device according to claim 8, characterized in that: The angles between the two first support rods (301) and the first bottom plate (201) are equal and both are acute angles, and the inclination directions of the two first support rods (301) are both toward the middle of the first bottom plate (201); the angles between the two second support rods (401) and the second bottom plate (202) are equal and both are acute angles, and the inclination directions of the two second support rods (401) are both toward the middle of the second bottom plate (202).

10. The solid rocket engine placement state changing device according to claim 2, characterized in that: The solid engine placement state changing device further comprises a liner (7), and the liner (7) is arranged on the inner side of the semicircular ring hoop (502).

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