Transfer and shaping aid for solid rocket engines or propellant grains
By designing a combination of vehicle frame, movable frame and lifting device, the problem of safe transfer and shaping of solid rocket engines in the workshop was solved, realizing an efficient and safe operation process and improving production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-09
AI Technical Summary
In the existing technology, the movement and shaping of solid rocket motors within the workshop poses safety hazards, is inefficient, cannot be transferred outside the workshop, is difficult for operators, and results in low production efficiency.
A transfer and shaping auxiliary device was designed, which includes a vehicle frame, a movable frame, and a lifting device. By using a combination of support base and support rollers, the solid rocket motor can be safely fixed and easily rotated through the lifting device. The support base fits against the outer wall of the engine, and the movable frame can be raised and lowered to support or not support the end of the engine, so as to achieve safe transfer and operation.
This technology enables safe and efficient transport and shaping of solid rocket engines, reduces operational difficulty, improves production efficiency, and ensures operational safety and quality.
Smart Images
Figure CN224337148U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of solid rocket engines, specifically relating to a transport and shaping auxiliary device for solid rocket engines or propellant grains. Background Technology
[0002] Solid rocket engines are chemical rocket engines that use solid propellants. They are also known as solid propellant rocket engines. After the solid propellant is ignited, it burns in the combustion chamber, converting chemical energy into heat energy and producing high-temperature, high-pressure combustion products. These products flow through the nozzle, where they expand and accelerate, converting heat energy into kinetic energy, and are expelled at high speed from the nozzle to generate thrust.
[0003] Currently, there is an increasing number of solid rocket motors under development with dimensions exceeding 2000mm in length and 400mm in diameter before demolding, and a weight exceeding 300kg before demolding. On the one hand, the movement of solid rocket motors within the workshop relies on overhead cranes mounted on the workshop ceiling. For larger solid rocket motors, the flipping process involves a coordinated effort of personnel and cranes, involving haphazard pulling and dragging. This process not only poses significant safety hazards but is also inefficient. Furthermore, it prevents the transfer of solid rocket motors outside the reach of the overhead cranes within the workshop, hindering solid rocket motor production operations.
[0004] On the other hand, the solid rocket motor is too large and heavy. During the subsequent shaping and cleaning of the end package, the operator has to keep rotating around the engine port while the engine is stationary, constantly looking for a favorable position for shaping and maintaining this posture. When the end package is being covered, the spread material is fluid, which increases the difficulty of the operation and results in low production efficiency. Summary of the Invention
[0005] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a transfer and shaping auxiliary device for solid rocket engines or propellant grains, which can be fixed for transfer while allowing for safe and easy rotation. It is simple to operate, convenient to use, and reduces operational safety hazards.
[0006] The technical solution of this utility model is as follows: it includes a vehicle frame, a movable frame, and a lifting device; the vehicle frame includes a frame body, with leg wheels installed at the four corners of the frame body, and a support frame installed on the frame body near the inner side of the leg wheels. The support frame includes a front support at the front end and a rear support at the rear end, and both the front and rear supports are equipped with support seats for supporting the solid rocket motor or propellant grain to be transported; the support seat includes two symmetrically arranged support blocks, and the inner surface of the support blocks is an inclined surface that fits against the outer wall of the solid rocket motor or propellant grain; there are two types of support seats, one is a large support seat and the other is a small support seat, the distance between the two support blocks of the large support seat is greater than the distance between the two small support blocks of the small support seat; the movable frame is equipped with... There is a set of large support rollers used in conjunction with the large support base, and a set of small support rollers used in conjunction with the small support base. The large support roller set includes four large support wheels arranged at the four corners of the movable frame, and the small support roller set includes four small support wheels arranged in the middle of the movable frame. The movable frame has clearance space for the front and rear supports. The movable frame is mounted on the vehicle frame via a lifting device. When the movable frame is raised to the point where the large or small guide roller set supports the outer wall of the front end of the solid rocket motor or propellant grain, the wheel surfaces of the two large / small guide rollers at the front end make rotational contact with the outer wall of the front end of the solid rocket motor or propellant grain, and the wheel surfaces of the two large / small guide rollers at the rear end make rotational contact with the outer wall of the rear end of the solid rocket motor or propellant grain.
[0007] The screw jack is mounted on the mounting plates at the four corners of the frame, and the handwheel is mounted on the upright plate in the middle of the frame.
[0008] When the movable frame descends to a point where the large or small guide wheel assembly does not support the outer wall of the solid rocket motor or propellant grain, the support seat mounted on the front support supports the front end of the solid rocket motor or propellant grain, and the support seat mounted on the rear support supports the rear end of the solid rocket motor or propellant grain.
[0009] The distance between the tangents of the outer wall of the solid rocket motor or propellant grain and the inclined surfaces of the two blocks of the large support base is less than the distance L between the two large support wheel surfaces at the front end; the distance between the tangents of the outer wall of the solid rocket motor or propellant grain and the inclined surfaces of the two blocks of the small support base is less than the distance between the two small support wheel surfaces at the front end.
[0010] The small support is located outside the large support; the support is a V-shaped seat.
[0011] The casters include two fixed casters and two swivel casters with brakes. The two fixed casters are located at the front under the frame, and the two swivel casters with brakes are located at the rear under the frame.
[0012] The frame is equipped with leg wheels at the four corners below, with the leg wheels mounted on the lower part of the leg wheels.
[0013] The frame has a forklift bay at its bottom.
[0014] The lifting device includes four screw jacks, a handwheel, and a transmission reversing mechanism. The transmission reversing mechanism includes a horizontal right-angle reversing device and two vertical right-angle reversing devices. The input end of the horizontal right-angle reversing device is connected to the handwheel via a drive shaft. The front output end of the horizontal right-angle reversing device is connected to the input end of a vertical right-angle reversing device via a drive shaft. The rear output end of the horizontal right-angle reversing device is connected to the input end of another vertical right-angle reversing device via a drive shaft. The two output ends of each vertical right-angle reversing device are respectively connected to the input end of the screw jack via a drive shaft. The output end of the screw jack is connected to the bottom surface of the movable frame.
[0015] The axis of the drive shaft connected to the handwheel is perpendicular to the axis of the solid rocket motor or propellant grain.
[0016] This invention enables the secure transport of solid rocket motors or propellant grains during demolding, while also allowing for safe and easy rotation. The lifting device securely positions the engine, both fixing it in place and allowing for easy rotation by lifting it. This invention ensures safe, high-quality, and efficient completion of tasks such as demolding tooling disassembly, propellant shaping, cleaning, and end-face coating for solid rocket motors, addressing the need for safe and efficient production of these large and medium-sized engines. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model;
[0018] Figure 2 yes Figure 1 The main view;
[0019] Figure 3 yes Figure 1 Top view;
[0020] Figure 4 yes Figure 1 The left view. Detailed Implementation
[0021] Figure 1-4 In this invention, the vehicle frame 1, the movable frame 2, and the lifting device are used to fix and easily rotate a solid rocket motor or solid rocket propellant.
[0022] 1) The frame of the vehicle body 1 is constructed from welded profiles with a powder-coated surface. A forklift bay 101 is located at the bottom of the frame for easy forklift access and transport. The propellant charge is fixedly supported on the vehicle body frame, and the contact surface with the propellant charge is protected with a non-slip soft material. Leg wheels are installed at the four corners of the frame, including two directional casters 104 and two omnidirectional casters with brakes. The two directional casters are located at the front end of the frame, and the two omnidirectional casters with brakes are located at the rear end. A support frame 105 is installed on the frame near the inner side of the leg wheels. The support frame 105 includes a front support at the front end and a rear support at the rear end. Both the front and rear supports are equipped with support seats for supporting the solid rocket motor to be transported. The support seat includes two symmetrically arranged support blocks, the inner surface of which is an inclined surface that fits against the outer wall of the solid rocket motor. There are two types of support bases: a large support base 206 and a small support base 207. The distance between the two support blocks of the large support base 206 is greater than the distance between the two small support blocks of the small support base 207.
[0023] 2) The movable frame 2 is equipped with two sets of support rollers, each set having two support wheels, for a total of four support wheels supporting the medicament cartridge. The support wheels are rubber-coated wheels, using an iron core covered with a conductive soft material. The product can rotate on the movable frame to complete various operations. The two sets of support rollers include a large support roller group that works with the large support base 206 and a small support roller group that works with the small support base 207. The large support roller group includes four large support wheels 204 arranged at the four corners of the movable frame 2, and the small support roller group includes four small support wheels 205 arranged in the middle of the movable frame 2.
[0024] 3) The lifting device uses four screw jacks 3, connected and switched via T-type commutators. Power is input via a handwheel, allowing all four jacks to rise or fall simultaneously. Each individual screw jack can lift 500kg, and the four combined can lift a 2T load. The lifting device enables the switching between the vehicle body frame and the lifting frame. The T-type commutator consists of one horizontal right-angle commutator 302 and two vertical right-angle commutators 303. The input end of the horizontal right-angle commutator 302 is connected to the handwheel 301 via a drive shaft. The front output end of the horizontal right-angle commutator 302 is connected to the input end of one vertical right-angle commutator 303 via a drive shaft. The rear output end of the horizontal right-angle commutator 302 is connected to the input end of another vertical right-angle commutator 303 via a drive shaft. The two output ends of each vertical right-angle commutator 303 are connected to the input end of one screw jack 3 via a drive shaft. The output end of the screw jack 3 is connected to the bottom surface of the movable frame 2. The screw jack 3 is mounted on the mounting plates 103 at the four corners of the frame, and the handwheel 301 is mounted on the upright plate 102 in the middle of the frame.
[0025] In use, when the movable frame 2 is raised to the point where the large or small guide wheel assembly supports the outer wall of the solid rocket motor's front end, the wheel surfaces of the two large / small guide wheels at the front end make rotational contact with the outer wall of the solid rocket motor's front end, and the wheel surfaces of the two large / small guide wheels at the rear end make rotational contact with the outer wall of the solid rocket motor's rear end. When the movable frame 2 is lowered to the point where the large or small guide wheel assembly no longer supports the outer wall of the solid rocket motor's front end, the support seat mounted on the front bracket supports the front end of the solid rocket motor, and the support seat mounted on the rear bracket supports the rear end of the solid rocket motor.
[0026] This invention provides a novel auxiliary device for transporting and shaping solid rocket motors or propellant grains, ensuring high safety, high quality, and high efficiency in the transport, shaping, and end-packing of these components. The device allows for the safe placement and fixation of the engine, while also enabling easy rotation through simple adjustments to facilitate demolding, shaping, cleaning, and end-packing.
Claims
1. A transport and shaping auxiliary device for solid rocket motors or propellant grains, characterized in that: Includes a vehicle body frame (1), a movable frame (2), and a lifting device; The vehicle frame (1) includes a frame, with leg wheels installed at the four corners of the frame. A support frame (105) is installed on the frame near the inner side of the leg wheels. The support frame (105) includes a front support at the front end and a rear support at the rear end. Both the front and rear supports are equipped with support seats for supporting the solid rocket motor or propellant to be transported. The support seat includes two symmetrically arranged support blocks. The inner side of the support block is an inclined surface that fits against the outer wall of the solid rocket motor or propellant. There are two types of support seats: a large support seat (206) and a small support seat (207). The distance between the two support blocks of the large support seat (206) is greater than the distance between the two small support blocks of the small support seat (207). The movable frame (2) is provided with a set of large support rollers that cooperate with the large support base (206) and a set of small support rollers that cooperate with the small support base (207). The large support roller set includes four large support wheels (204) arranged at the four corners of the movable frame (2), and the small support roller set includes four small support wheels (205) arranged in the middle of the movable frame (2). The movable frame (2) has clearance space for the front support and the rear support. The movable frame (2) is mounted on the vehicle body frame (1) via a lifting device; When the movable frame (2) is raised to support the outer wall of the front end of the solid rocket motor or propellant grain, the wheel surfaces of the two large / small guide wheels at the front end rotate in contact with the outer wall of the front end of the solid rocket motor or propellant grain, and the wheel surfaces of the two large / small guide wheels at the rear end rotate in contact with the outer wall of the rear end of the solid rocket motor or propellant grain.
2. The transport and shaping auxiliary device for solid rocket motors or propellant grains according to claim 1, characterized in that: The lifting device includes four screw jacks (3), a handwheel (301), and a transmission reversing mechanism. The transmission reversing mechanism includes a horizontal right-angle reversing device (302) and two vertical right-angle reversing devices (303). The input end of the horizontal right-angle reversing device (302) is connected to the handwheel (301) via a transmission shaft. The front output end of the horizontal right-angle reversing device (302) is connected to the input end of a vertical right-angle reversing device (303) via a transmission shaft. The rear output end of the horizontal right-angle reversing device (302) is connected to the input end of another vertical right-angle reversing device (303) via a transmission shaft. The two output ends of each vertical right-angle reversing device (303) are respectively connected to the input end of the screw jack (3) via a transmission shaft. The output end of the screw jack (3) is connected to the bottom surface of the movable frame (2).
3. The transport and shaping auxiliary device for solid rocket motors or propellant grains according to claim 1, characterized in that: When the movable frame (2) descends to the point where the large guide wheel assembly or the small guide wheel assembly does not support the outer wall of the front end of the solid rocket motor or the propellant grain, the support seat mounted on the front support supports the front end of the solid rocket motor or the propellant grain, and the support seat mounted on the rear support supports the rear end of the solid rocket motor or the propellant grain.
4. The transport and shaping auxiliary device for solid rocket motors or propellant grains according to claim 1, characterized in that: The distance between the outer wall of the solid rocket motor or propellant grain and the tangent of the two inclined surfaces of the large support base (206) is less than the distance L between the wheel surfaces of the two large support wheels (204) located at the front end; the distance between the outer wall of the solid rocket motor or propellant grain and the tangent of the two inclined surfaces of the small support base (207) is less than the distance between the wheel surfaces of the two small support wheels (205) located at the front end.
5. The transport and shaping auxiliary device for solid rocket motors or propellant grains according to claim 1, characterized in that: The small support (207) is located outside the large support (206); the support is a V-shaped seat.
6. The transport and shaping auxiliary device for solid rocket motors or propellant grains according to claim 1, characterized in that: The casters include two directional casters (104) and two swivel casters with brakes. The two directional casters are located at the front end of the frame, and the two swivel casters with brakes are located at the rear end of the frame.
7. The transport and shaping auxiliary device for solid rocket motors or propellant grains according to claim 1, characterized in that: The frame is equipped with leg wheels at the four corners below, with the leg wheels mounted on the lower part of the leg wheels.
8. The transport and shaping auxiliary device for solid rocket motors or propellant grains according to claim 1, characterized in that: The bottom of the frame is equipped with a forklift bay (101).
9. The transport and shaping auxiliary device for solid rocket motors or propellant grains according to claim 2, characterized in that: The screw jack (3) is mounted on the mounting plates (103) at the four corners of the frame, and the handwheel (301) is mounted on the upright plate (102) in the middle of the frame.
10. The transport and shaping auxiliary device for solid rocket motors or propellant grains according to claim 2, characterized in that: The axis of the drive shaft connected to the handwheel (301) is perpendicular to the axis of the solid rocket motor or propellant.