A launch cylinder for accelerating a test

Abstract

The utility model discloses a launch cylinder for accelerating test, including water tank, air cylinder cylinder, damping cylinder cylinder, launch piston, launch rope and back pull rope, air cylinder cylinder and damping cylinder cylinder are all one end plugging and mutually butt joint intercommunication and form the work cylinder for launch piston reciprocating motion, the work cylinder is located in the water tank. The circumferential surface of damping cylinder cylinder is equipped with water hole, and the middle part of damping cylinder cylinder is arranged with several launch holes that are inclined to the closed section of damping cylinder cylinder, the launch hole is connected with water pump, and the closed end of damping cylinder cylinder is equipped with the air inlet. When launch piston moves to the damping cylinder cylinder, and the liquid in the damping cylinder cylinder is impacted to produce damping force, thereby gradually reducing the tension, and through back pull rope, the carrying trolley is decelerated, and the carrying trolley can steadily decelerate, and the brake impact to the car body is reduced.

Description

Technical Field

[0001] This utility model relates to the field of launch test technology, and in particular to a launch cylinder for accelerated testing. Background Technology

[0002] Acceleration tests are tests conducted to assess the performance and mass of a launched object and to arrest and brake it.

[0003] In existing technologies, such as the launch test system with patent number CN215984197U, the launch cylinder is a simple pneumatic cylinder, which is only used to provide launch power for the trolley. Both chambers inside the launch cylinder are connected to the air source, and the air pressure changes rapidly, making it difficult to control. Therefore, the equipment cost is high and the stability is poor.

[0004] Secondly, the carrier trolley stops solely using the first and second braking units. The first braking unit stops the reciprocating car, while the second braking unit stops the carrier trolley, which rests on the reciprocating car. Both the first and second braking units only stop the reciprocating car and the carrier trolley at the front of the vehicle body, resulting in significant braking impact. At high launch speeds, the reciprocating car and the carrier trolley may be damaged by impact, placing extremely high demands on the braking performance of both braking units. Utility Model Content

[0005] To address the technical problems in existing launch test systems that rely solely on two braking units to stop the reciprocating vehicle and the carrying trolley, which places extremely high demands on the braking performance of the two braking units or causes significant braking impact on the vehicle body, potentially leading to vehicle body collision damage, this utility model provides a launch cylinder for acceleration testing to solve the aforementioned problems.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a launch cylinder for accelerated testing, including a water tank, a cylinder barrel, a damping cylinder barrel, a launch piston, a launch rope, and a pull-back rope. The cylinder barrel and the damping cylinder barrel are both sealed at one end and connected to each other to form a working cylinder barrel for the reciprocating motion of the launch piston. The two ends of the launch rope are respectively connected to the launch piston and the front end of the carrier trolley, and the two ends of the pull-back rope are respectively connected to the launch piston and the rear end of the carrier trolley. The working cylinder barrel is located in the water tank.

[0007] The damping cylinder barrel has water passage holes on its circumferential surface, and several emission holes inclined towards the closed section of the damping cylinder barrel are arranged in the middle of the damping cylinder barrel. The emission holes are connected to the water pump, and the closed end of the damping cylinder barrel has an air inlet.

[0008] In an optional embodiment of this utility model, the damping cylinder barrel includes a water leakage section, an impact section and a damping section connected in sequence. The water leakage section is connected to the cylinder barrel. The water passage hole is located on the surface of the damping section. A water leakage hole is provided on the outer peripheral surface of the water leakage section near the impact section. The emission hole is located at the connection between the impact section and the damping section.

[0009] In an optional embodiment of this utility model, the impact section and the damping section are connected by a water spray ring. The water spray ring includes an inner ring and an outer ring, which together form an annular cavity. The two ends of the inner ring are connected to the impact section and the damping section. The emission hole is located on the surface of the inner ring, and the water pump is connected to the outer ring.

[0010] In an optional embodiment of this invention, the density of water-permeable holes on the surface of the damping section near the end of the pullback rope is the highest.

[0011] In an optional embodiment of this utility model, a test base is included, the surface of which is recessed to form a water tank, the water pump is located on the upper surface of the test base, and the water outlet pipe of the water pump is connected to the damping cylinder barrel in the water tank through a ramp channel.

[0012] In an optional embodiment of this utility model, the test base has a baffle plate covering the water tank above the damping section and a side baffle plate arranged laterally in the water tank, the side baffle plate being located in front of the emission port.

[0013] The beneficial effects of this utility model are:

[0014] (1) The present invention places the working cylinder in a water tank and divides the working cylinder into a pneumatic cylinder and a damping cylinder. It relies on compressed air to provide launching power and fills the damping cylinder with water through the inclined launching hole. When the launching piston moves to the damping cylinder, it impacts the liquid in the damping cylinder to generate damping force, thereby gradually reducing the pulling force. The carrying trolley is decelerated by pulling back the rope, so that the carrying trolley can decelerate smoothly and reduce the braking impact on the vehicle body.

[0015] (2) The damping cylinder of this utility model includes a water leakage section, an impact section and a damping section connected in sequence. Excess water is leaked out by the water leakage section and used for venting. The water volume in the impact section is small and can be used to drive the water flow when the launching piston reaches the impact section, thereby reducing the initial impact force of the launching piston. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a front view of a specific embodiment of the launch cylinder for accelerated testing described in this utility model;

[0018] Figure 2 yes Figure 1 Sectional view along axis AA;

[0019] Figure 3 yes Figure 2 Enlarged view of point a in the middle;

[0020] Figure 4 yes Figure 2 Enlarged view at point b in the middle;

[0021] Figure 5 yes Figure 2 Enlarged view at point c;

[0022] Figure 6 This is a perspective view of a specific embodiment of the launch cylinder for accelerated testing according to this utility model;

[0023] Figure 7 yes Figure 6 Enlarged view at point d;

[0024] Figure 8 yes Figure 6 Enlarged view at point e in the middle;

[0025] Figure 9 This is a schematic diagram of the inclined passageway in the test base.

[0026] In the diagram, 1. Water tank; 2. Working cylinder; 201. Air cylinder; 202. Damping cylinder; 2021. Leakage section; 2022. Impact section; 2023. Damping section; 3. Launch piston; 4. Launch rope; 5. Pull-back rope; 6. Water passage; 7. Launch hole; 8. Water pump; 9. Air inlet; 10. Leakage hole; 11. Water spray ring; 1101. Inner ring; 1102. Outer ring; 1103. Annular cavity; 12. Test base; 13. Inclined passage; 14. Water baffle; 15. Side baffle; 16. Carrying trolley. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] Example 1

[0029] like Figures 1-6As shown, a launch cylinder for accelerated testing includes a water tank 1, a cylinder barrel 201, a damping cylinder barrel 202, a launch piston 3, a launch rope 4, and a pullback rope 5. The cylinder barrel 201 and the damping cylinder barrel 202 are both sealed at one end and connected to each other to form a working cylinder 2 for the reciprocating motion of the launch piston 3. The two ends of the launch rope 4 are respectively connected to the front end of the launch piston 3 and the front end of the carrier trolley 16, and the two ends of the pullback rope 5 are respectively connected to the rear end of the launch piston 3 and the rear end of the carrier trolley 16. The working cylinder 2 is located in the water tank 1.

[0030] The circumferential surface of the damping cylinder barrel 202 is provided with a water passage hole 6. Several emission holes 7 inclined towards the closed section of the damping cylinder barrel 202 are arranged in the middle of the damping cylinder barrel 202. The emission holes 7 are connected to the water pump 8. The closed end of the damping cylinder barrel 202 is provided with an air inlet 9.

[0031] The launching rope 4 and the pullback rope 5 are always in a taut state. Initially, the launching piston 3 is located at the front end of the working cylinder 2. The water pump 8 fills the damping cylinder 202 with water through the launching hole 7. The launching hole 7 is arranged at an angle so that the water flow mainly gathers at the closed end of the damping cylinder 202. A small amount of water will also enter the cylinder 201. Overall, the water level in the damping cylinder 202 is relatively high. When the launch carrier trolley 16 needs to be launched, air is supplied to the front cavity of the launch piston 3 through the air inlet 9, causing the launch piston 3 to move backward. This pulls the carrier trolley 16 through the launch rope 4. When the launch piston 3 moves to the damping cylinder 202, the gas is discharged through the outer hole, and the launch piston 3 impacts the liquid to generate damping force. The liquid in the damping cylinder 202 is squeezed by the launch piston 3 and flows outward through the water passage 6 into the water tank 1. Some of the liquid will re-enter the damping cylinder 202 through the water passage 6 and reach the front cavity of the launch piston 3 until the launch piston 3 stops.

[0032] This invention adds liquid damping function by setting up a damping cylinder 202, which enables the trolley 16 to decelerate smoothly, reduces the braking impact on the vehicle body, has low equipment cost, and has higher stroke control accuracy.

[0033] Example 2

[0034] Based on Example 1, such as Figure 2 and Figure 4 As shown, the damping cylinder barrel 202 includes a water leakage section 2021, an impact section 2022 and a damping section 2023 connected in sequence. The water leakage section 2021 is connected to the cylinder barrel 201. The water passage hole 6 is located on the surface of the damping section 2023. A water leakage hole 10 is provided on the outer peripheral surface of the end of the water leakage section 2021 near the impact section 2022. The emission hole 7 is located at the connection between the impact section 2022 and the damping section 2023.

[0035] The impact section 2022 has no perforated structure on its outer periphery. When the damping section 2023 is filled with water, a small amount of water will enter the impact section 2022, forming a sloping water surface that is lower in the front and higher in the back. If a small amount of liquid spreads to the leakage section 2021, it will be discharged in time through the leakage hole 10, thus ensuring that the cylinder barrel 201 is water-free. When the launch test is started, the launch piston 3 moves from the cylinder barrel 201 to the leakage section 2021. After reaching the location of the leakage hole 10, the gas can be gradually discharged and depressurized through the leakage hole 10. When the launch piston 3 enters the impact section 2022, it contacts and impacts the low-level liquid in front, causing the liquid to flow. As the launch piston 3 moves backward, the contact area between the liquid and the launch piston 3 gradually increases, which can reduce the initial impact force of the launch piston 3 impacting the liquid.

[0036] In further design, such as Figure 3 As shown, the impact section 2022 and the damping section 2023 are connected by a water spray ring 11. The water spray ring 11 includes an inner ring 1101 and an outer ring 1102, which together form an annular cavity 1103. The two ends of the inner ring 1101 are connected to the impact section 2022 and the damping section 2023. The emission holes 7 are located on the surface of the inner ring 1101, and the water pump 8 is connected to the outer ring 1102. The water pump 8 draws water from an external water source into the annular cavity 1103, and then sprays it into the damping section 2023 through multiple circumferentially arranged emission holes 7.

[0037] Example 3

[0038] Based on Example 2, the density of water-permeable holes 6 on the surface of the damping section 2023 near the end of the pullback rope 5 is the highest. For example... Figure 2 As shown, the rear half of the circumferential surface of the damping section 2023 is covered with water passage holes 6, while the front half of the damping section 2023 has relatively sparse water passage holes 6. This design is intended to concentrate the liquid at the end of the damping section 2023 first. Furthermore, during resetting, due to the higher density of the water passage holes 6 at the rear end of the damping section 2023, water can quickly enter the rear cavity of the launching piston 3, which helps the launching piston 3 to quickly reset forward.

[0039] Example 4

[0040] Based on the above embodiments, such as Figures 6-8 As shown, the launch cylinder also includes a test base 12, with a recessed surface forming a water tank 1. A water pump 8 is located on the upper surface of the test base 12, meaning the height of the water pump 8 is higher than the height of the water tank 1. The outlet pipe of the water pump 8 is connected to the damping cylinder 202 inside the water tank 1 via a ramp channel 13 (e.g., Figure 9 (As shown). When there is water in the tank 1, it will not overflow onto the surface where the water pump 8 is located above through the ramp channel 13.

[0041] In further design, such as Figure 7 As shown, the test base 12 has a baffle plate 14 covering the water tank 1 above the damping section 2023 and a side baffle plate 15 arranged laterally in the water tank 1, with the side baffle plate 15 located in front of the firing port 7. Because the damping section 2023 has a large water volume, the baffle plate 14 is used to shield the area above the water tank 1 to prevent water waves from being generated when the firing piston 3 impacts the liquid. The height of the side baffle plate 15 is higher than the water level height of the damping section 2023. The side baffle plate 15 is used to block the water tanks 1 on both sides, and a stable water level area is formed in the area of ​​the water tank 1 behind the side baffle plate 15. During firing or resetting, the liquid mainly flows in the area of ​​the water tank 1 outside the damping section 2023.

[0042] In the description of this utility model, it should be understood that the terms "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] In this specification, the illustrative expressions of the terms do not necessarily refer to the same embodiments. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0044] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A launch cylinder for accelerated testing, characterized in that: The system includes a water tank, a cylinder barrel, a damping cylinder barrel, a launching piston, a launching rope, and a pull-back rope. The cylinder barrel and the damping cylinder barrel are both sealed at one end and connected to each other to form a working cylinder barrel for the reciprocating motion of the launching piston. The two ends of the launching rope are respectively connected to the front end of the launching piston and the front end of the carrying trolley, and the two ends of the pull-back rope are respectively connected to the rear end of the launching piston and the carrying trolley. The working cylinder barrel is located inside the water tank. The damping cylinder barrel has water passage holes on its circumferential surface, and several emission holes inclined towards the closed section of the damping cylinder barrel are arranged in the middle of the damping cylinder barrel. The emission holes are connected to the water pump, and the closed end of the damping cylinder barrel has an air inlet.

2. The launch cylinder for accelerated testing according to claim 1, characterized in that: The damping cylinder barrel includes a water leakage section, an impact section and a damping section connected in sequence. The water leakage section is connected to the cylinder barrel. The water passage hole is located on the surface of the damping section. A water leakage hole is provided on the outer peripheral surface of the water leakage section near the impact section. The emission hole is located at the connection between the impact section and the damping section.

3. The launch cylinder for accelerated testing according to claim 2, characterized in that: The impact section and the damping section are connected by a water spray ring, which includes an inner ring and an outer ring. The inner ring and the outer ring form an annular cavity. The two ends of the inner ring are connected to the impact section and the damping section. The emission hole is located on the surface of the inner ring, and the water pump is connected to the outer ring.

4. The launch cylinder for accelerated testing according to claim 2, characterized in that: The density of water-permeable holes is highest on the surface of the damping section near the end of the pullback rope.

5. The launch cylinder for accelerated testing according to claim 2, characterized in that: The test base includes a water tank formed by a recess on its surface. The water pump is located on the upper surface of the test base, and the water outlet pipe of the water pump is connected to the damping cylinder in the water tank through a ramp channel.

6. The launch cylinder for accelerated testing according to claim 5, characterized in that: The test base has a baffle plate covering the water tank above the damping section and a side baffle plate arranged laterally in the water tank, the side baffle plate being located in front of the emission port.

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