An impact system

Abstract

The present invention relates to the field of impact and ejection test equipment, and specifically discloses an impact system. The impact system includes an ejection unit and a hydraulic damper. The ejection unit includes an ejection cylinder, a gas storage tank, and a gas supply component. The gas supply component is communicated with the gas storage tank. An ejection chamber and an air inlet chamber are provided in the ejection cylinder. A piston is slidably fitted in the ejection chamber, and the piston divides the ejection chamber into a first chamber and a second chamber. An opening valve core is slidably provided in the air inlet chamber, and the opening valve core is connected with a pushing component. A push rod is provided in the first chamber. The hydraulic damper is located in the first chamber. The hydraulic damper includes a hydraulic cylinder, a piston rod, a damping component, and an accumulator. An inner cavity is provided in the hydraulic cylinder. An energy storage chamber is provided in the accumulator. Two ends of the damping component are respectively communicated with the energy storage chamber and the inner cavity, and buffer gas is stored in the energy storage chamber. The impact system in the present invention increases the impact energy while buffering the piston of the ejection cylinder through a new hydraulic damper.

Description

Technical Field

[0001] The present invention relates to the field of impact and ejection test equipment, and particularly to an impact system. Background Art

[0002] When conducting impact and ejection tests, an object needs to be pushed out by an ejection device. Compressed air is a commonly used power source for providing ejection power. During use, an air supply device such as an air compressor is connected to an ejection cylinder, and the piston of the ejection cylinder is driven to slide by the air supply device, thereby driving the piston rod to extend. The piston rod of the ejection cylinder is used as a push rod to eject the object. However, when the air supply device and other equipment provide limited compressed air to the ejection cylinder per unit time, the impact energy of the piston of the ejection cylinder is limited, and the speed of the piston rod extending is limited, making it difficult to meet the situation requiring a larger ejection speed.

[0003] Subsequently, an ejection device provided with an air storage tank appeared. The air storage tank is connected to both the ejection cylinder and the air supply device, and a valve is provided between the air storage tank and the ejection cylinder. Before the test, compressed air is first conveyed into the air storage tank through the air supply device to increase the pressure in the air storage tank; during the test, the valve is opened, and the compressed air in the air storage tank quickly enters the ejection cylinder, causing the piston rod of the ejection cylinder to quickly slide outwards. Although the above ejection device can provide a larger ejection speed, because a large amount of compressed air needs to be introduced into the air storage tank, the pressure in the air storage tank is relatively large, and the valve is easily damaged under the action of the pressure.

[0004] Secondly, because the piston of the ejection cylinder slides at a relatively fast speed, a damper also needs to be provided in the ejection cylinder to buffer the piston. Commonly used hydraulic dampers usually include a spring, a hydraulic cylinder barrel, a cover plate, and a piston rod. The piston rod of the hydraulic damper is slidably sealed with the hydraulic cylinder barrel, and the cover plate is fixed at one end of the piston rod outside the hydraulic cylinder barrel. The two ends of the spring are respectively abutted against the cover plate and the hydraulic cylinder barrel; the damper cylinder is also connected to an external oil tank or another cavity for storing hydraulic oil. Taking the oil tank as an example, a damping component composed of a lift valve and a throttle valve is connected between the damper cylinder and the oil tank. During operation, the piston of the ejection cylinder presses on the cover plate and pushes the cover plate to slide, causing the piston rod of the hydraulic damper to slide into the hydraulic cylinder barrel, increasing the pressure in the hydraulic cylinder barrel, and causing the hydraulic oil in the hydraulic cylinder barrel to absorb the impact energy and then flow to the oil tank through the damping component for storage, realizing the buffering of the piston of the ejection cylinder.

[0005] However, the maximum buffering energy of the hydraulic oil in the hydraulic cylinder is relatively small, and the impact load that can be absorbed is limited. The maximum buffering speed that can be achieved is usually 8 m / s. When further increasing the impact energy of the piston of the ejection cylinder, the above hydraulic damper is difficult to reach the maximum buffering energy and maximum buffering speed required for a larger impact energy. Summary of the Invention

[0006] The present invention aims to provide an impact system which, while increasing the impact energy, buffers the piston of the ejection cylinder through a new hydraulic damper.

[0007] To achieve the above object, the present invention adopts the following technical solution: an impact system, comprising an ejection unit and a hydraulic damper. The ejection unit includes an ejection cylinder, a gas storage tank and an air supply member, and the air supply member is communicated with the gas storage tank; an ejection chamber and an air inlet chamber are provided in the ejection cylinder, a piston is slidably fitted in the ejection chamber, the piston divides the ejection chamber into a first chamber and a second chamber, and a communication port for communicating the air inlet chamber with the second chamber is provided on the inner wall of the ejection cylinder; the air inlet chamber is communicated with the gas storage tank, an opening valve core is slidably provided in the air inlet chamber, the opening valve core is opposite to the communication port and is used for closing the communication port, and the opening valve core is connected with a pushing member for pushing the opening valve core to slide.

[0008] A push rod is provided in the first chamber, one end of the push rod is fixed to the piston and the other end penetrates through the side wall of the ejection cylinder and extends to the outside of the ejection cylinder, and the push rod is slidably sealed with the side wall of the ejection cylinder.

[0009] The hydraulic damper is located in the first chamber. The hydraulic damper includes a hydraulic oil cylinder, a piston rod, a damping member and an accumulator. The hydraulic oil cylinder is installed on the inner wall of the first chamber. An inner cavity is provided in the hydraulic oil cylinder. One end of the piston rod is located in the inner cavity and is slidably sealed with the hydraulic oil cylinder, and the other end faces the piston; an energy storage cavity is provided in the accumulator, the damping member is located between the accumulator and the inner cavity, and both ends of the damping member are respectively communicated with the energy storage cavity and the inner cavity, and a buffer gas is stored in the energy storage cavity.

[0010] The beneficial effects of this solution are as follows:

[0011] 1. In this solution, the opening valve core is opposite to the communication port. Under the action of the pushing member, the opening valve core can close the communication port, so that when compressed gas is introduced into the gas storage tank, the compressed gas will not enter the second chamber, and thus no valve is needed at this time. Compared with the valve, the opening valve core in this solution has greater strength and can withstand higher pressure without being damaged. Therefore, before the test, more compressed gas can be introduced into the gas storage tank to reach a higher pressure. During the test, greater impact energy is provided for the sliding of the piston, enabling the piston and the push rod to slide out more quickly, and improving the test effect of impact and ejection tests.

[0012] 2. When it is necessary to close and open the communication port, it can be quickly driven by the pushing member, and the operation is convenient. Moreover, when the pressure in the gas storage tank and the air inlet chamber further increases, the opening valve core is pushed by the pushing member towards the side close to the communication port, and increasing the pressure between the opening valve core and the surrounding structure of the communication port can improve the sealing effect of the communication port. Therefore, there will be no air leakage even under high pressure.

[0013] 3. When the diameter of the connecting port is large, the connecting port can be closed by simultaneously increasing the diameter of the open valve core without considering whether the size of the connecting port is compatible with the specifications of the valve, making assembly and production simpler.

[0014] 4. In this solution, the piston rod slides into the inner cavity when subjected to pressure from the piston, causing the fluid in the inner cavity to flow into the energy storage chamber through the damping component. Because the energy storage chamber contains buffer gas, the pressure in the energy storage chamber increases after the fluid enters. As the amount of fluid entering increases, the oil pressure in the energy storage chamber will further increase. The increased oil pressure will increase the maximum buffering energy and maximum buffering speed of the fluid, ultimately being able to buffer pistons with greater impact energy. Furthermore, the buffer gas can be compressed after the oil pressure increases. Therefore, when a higher oil pressure is provided, sufficient space for fluid to flow into the energy storage chamber as buffering proceeds, ensuring that the buffer device can play a buffering role.

[0015] 5. Because the fluid will increase the pressure in the energy storage chamber after entering the energy storage chamber, when the piston is reset, the piston rod in the hydraulic cylinder is no longer under the pressure of the piston. At this time, the fluid in the energy storage chamber will automatically re-enter the ejection cylinder under the action of pressure, and there is no need to use external power parts such as pumps to pump the fluid into the hydraulic cylinder. The operation is simple and it can reset automatically.

[0016] Furthermore, a connecting assembly is provided between the opening valve core and the pushing member, and the connecting assembly includes a cross adapter A and a cross adapter B. The cross adapter A is connected to the pushing member, and a first guide groove is provided at the end of the opening valve core away from the connecting port, and a second guide groove is provided at the end of the cross adapter A close to the connecting port. The angle between the projection of the first guide groove along the axial direction of the cross adapter B and the second guide groove is less than or equal to 90°; guide blocks are fixed at both ends of the cross adapter B, and the two guide blocks are respectively located in the first guide groove and the second guide groove.

[0017] The beneficial effects of this solution are as follows: the opening valve core in this solution is connected to the pusher through the cross adapter A and the cross adapter B. When in use, the first guide groove and the second guide groove position the cross adapter B in the X-axis and Y-axis directions through the guide block, ensuring good coaxiality between the opening valve core, the cross adapter A and the pusher, so that the opening valve core is evenly stressed and will not be deformed under the action of pressure.

[0018] Furthermore, the two guide blocks are slidably engaged with the first guide groove and the second guide groove respectively, and the width of the guide block at one end away from the cross adapter B is greater than the width at one end close to the cross adapter B.

[0019] The beneficial effect of this solution is that during installation, the guide block can be slid along the first guide groove and the second guide groove to quickly connect the open valve core, the cross adapter B and the cross adapter A in sequence.

[0020] Further, the moving part is located outside the intake cavity, and one end of the opening valve core away from the communication port penetrates through the side wall of the intake cavity opposite to the communication port and is slidably sealed with the side wall.

[0021] The beneficial effect of this solution is that the use of the pushing part in this solution is not affected by the pressure in the intake cavity, and the failure rate can be reduced.

[0022] Further, the cross-section of the opening valve core along the axial direction is T-shaped, a ring-shaped limiting side wall is formed on the opening valve core, and a ring-shaped buffer pad is fixed on the limiting side wall.

[0023] The beneficial effect of this solution is that when the opening valve core slides to the side away from the communication port, the buffer pad prevents the opening valve core from directly contacting and colliding with the inner wall of the intake cavity, and avoids damage to the opening valve core and the inner wall of the intake cavity.

[0024] Further, a valve core sleeve is provided between the side wall of the intake cavity opposite to the communication port and the limiting side wall. The valve core sleeve is sleeved on the opening valve core and is detachably connected to the inner wall of the intake cavity, and the opening valve core is slidably matched with the valve core sleeve.

[0025] The beneficial effect of this solution is that the valve core sleeve can play a guiding role in the sliding of the opening valve core and prevent the opening valve core from being skewed.

[0026] Further, at least one of the energy storage cavity and the inner cavity is communicated with a liquid inlet part, and the liquid inlet part is used for introducing a fluid into the energy storage cavity or the inner cavity communicated with it.

[0027] The beneficial effect of this solution is that when the impact energy of the piston of the ejection cylinder further increases, fluid can be introduced into the energy storage cavity or the hydraulic oil cylinder through the liquid inlet part to further increase the oil pressure in the energy storage cavity, so that its maximum buffer energy and maximum buffer speed are further increased. Therefore, the buffer effect of the buffer device in this solution can be adjusted to meet the requirements of different impact energies.

[0028] Further, a fluid is stored in the energy storage cavity, and the volume of the fluid is smaller than the volume of the energy storage cavity.

[0029] The beneficial effect of this solution is that when the piston rod in the hydraulic oil cylinder is no longer under pressure and the hydraulic oil flowing from the hydraulic oil cylinder into the energy storage cavity flows back into the hydraulic oil cylinder, because the energy storage cavity always stores hydraulic oil, the buffer gas in the energy storage cavity is concentrated above the hydraulic oil in the energy storage cavity and will not enter the hydraulic oil cylinder.

[0030] Further, there are at least two ejection cylinders and push rods, and all the ejection cylinders and push rods are circumferentially spaced apart.

[0031] The beneficial effects of this solution are as follows: The ends of the two push rods far from the piston penetrate through the ends of the ejection cylinders. During the sliding process of the piston and the push rods, the two push rods can guide the piston to prevent the piston from rotating. There are piston rods sliding and sealed in both ejection cylinders, and there is fluid stored in the inner cavities of the ejection cylinders. The two ejection cylinders can better buffer the piston.

[0032] Furthermore, the buffer gas is nitrogen or inert gas.

[0033] The beneficial effects of this solution are as follows: When the fluid in the hydraulic cylinder enters the energy storage cavity, the pressure in the energy storage cavity will increase. The buffer gas in this solution is relatively stable and will not react after the pressure increases, improving the safety of use. Description of the Drawings

[0034] Figure 1 It is the front vertical sectional view of the ejection unit in the embodiment of the present invention;

[0035] [[ID=??]] Figure 2 is Figure 1 the enlarged view at A in

[0036] Figure 3 Figure 2 the three-dimensional view of the opening valve core in

[0037] Figure 4 is Figure 1 the three-dimensional view of the hydraulic cylinder and the push rod in

[0038] Figure 5 It is the connection schematic diagram of the hydraulic damper in the embodiment of the present invention;

[0039] Figure 6 is Figure 4 the vertical sectional view of the hydraulic cylinder in

[0040] Figure 7 is Figure 6 the enlarged view at B in

[0041] Figure 8 is Figure 5 the structural schematic diagram of the damping component in Specific Embodiments

[0042] The following is a further detailed description through specific embodiments:

[0043] It should be noted that there seems to be a missing number in the "ID=??" part in the original text. This might be an oversight. The translation is done as accurately as possible based on the available content.The reference numerals in the accompanying drawings of the specification include: ejection cylinder 1, first chamber 11, second chamber 12, intake chamber 13, cylinder end cover 14, communication port 15, piston 16, push rod 17, gas storage tank 2, opening 21, opening valve core 3, limiting side wall 31, buffer pad 32, valve core sleeve 33, first guide groove 34, pushing member 4, cross joint B 41, cross joint A 42, fixing sleeve 43, guide block 44, second guide groove 45, hydraulic cylinder 5, liquid discharge channel 51, inner cavity 52, piston rod 6, cover plate 61, spring 62, accumulator 7, energy storage chamber 71, damping member 8, liquid inlet member 9.

[0044] Embodiment 1

[0045] An impact system, as Figure 1 , Figure 2 , Figure 3 and Figure 5 shown, includes an ejection unit and a hydraulic damper. The ejection unit includes an ejection cylinder 1, a gas storage tank 2 and a gas supply member (not shown in the figure). There is a cavity inside the ejection cylinder 1. A cylinder end cover 14 is provided at the right part of the cavity. The space on the right side of the cylinder end cover 14 forms an intake chamber 13. A piston 16 is slidably sealed on the left side of the cylinder end cover 14. The space on the left side of the piston 16 is the first chamber 11, and the space between the piston 16 and the cylinder end cover 14 is the second chamber 12. A communication port 15 is provided on the cylinder end cover 14 to communicate the second chamber 12 with the intake chamber 13.

[0046] The gas storage tank 2 is installed on the top of the ejection cylinder 1 by screws. Openings 21 that are aligned with each other are provided at the bottom of the gas storage tank 2 and the top of the intake chamber 13 to communicate the gas storage tank 2 with the intake chamber 13. In this embodiment, the gas supply member is an air compressor, and the gas supply member is communicated with the gas storage tank 2 through a pipeline.

[0047] An opening valve core 3 is horizontally provided in the intake chamber 13. The cross-section of the opening valve core 3 along the vertical direction is T-shaped, so that a step is formed on the outer wall of the opening valve core 3. The side surface of the step parallel to the right inner wall of the intake chamber 13 is the limiting side wall 31. In this embodiment, an annular buffer pad 32 is adhesively bonded to the limiting side wall 31, and the buffer pad 32 is made of elastic rubber material. The right end of the opening valve core 3 horizontally penetrates the right wall of the intake chamber 13 and is slidably sealed with the right wall of the intake chamber 13. A valve core sleeve 33 is provided between the buffer pad 32 and the right wall of the intake chamber 13. In this embodiment, the valve core sleeve 33 is made of copper, and the valve core sleeve 33 is sleeved on the opening valve core 3, and the opening valve core 3 is slidably sealed with the valve core sleeve 33. The right end of the valve core sleeve 33 is installed on the right wall of the intake chamber 13 by screws, and the left end is opposite to the buffer pad 32 to limit the opening valve core 3.

[0048] On the right side of the opening valve core 3, a cross adapter A42 and a cross adapter B41 are successively arranged from left to right. At the right end of the opening valve core 3, a first guide groove 34 is provided. At the left end of the cross adapter A42, a second guide groove 45 is provided. The first guide groove 34 and the second guide groove 45 respectively penetrate through the opening valve core 3 and the cross adapter A42 radially, and the projection of the first guide groove 34 to the right is perpendicular to the second guide groove 45. At the left end and the right end of the cross adapter B41, guide blocks 44 are integrally formed. The width of the end of the guide block 44 away from the cross adapter B41 is greater than the width of the end close to the cross adapter B41. Specifically, in this embodiment, the guide block 44 is T-shaped. In actual implementation, the first guide groove 34, the second guide groove 45, and the guide block 44 can also be dovetail-shaped. After the two guide blocks 44 slide into the first guide groove 34 and the second guide groove 45 respectively, there will be no relative movement along the axial direction between the opening valve core 3, the cross adapter B41, and the cross adapter A42, ensuring that the pushing member 4 can drive the opening valve core 3 to slide. In this embodiment, the ejection cavity, the cylinder end cover 14, the communication port 15, the intake cavity 13, the opening valve core 3, the cross adapter B41, the cross adapter A42, and the piston rod 6 of the pushing member 4 are all coaxial; and the first guide groove 34 and the second guide groove 45 respectively position the cross adapter B41 in the X-axis and Y-axis directions, so that during the sliding process of the opening valve core 3, there will be no displacement in the X-axis and Y-axis directions between the opening valve core 3, the cross adapter B41, and the cross adapter A42, ensuring good coaxiality between the opening valve core 3, the cross adapter B41, and the cross adapter A42.

[0049] The pushing member 4 is located on the right side of the ejection cylinder 1. In this embodiment, the pushing member 4 also adopts a cylinder. A fixing sleeve 43 is installed on the right end of the ejection cylinder 1 by screws. The right end of the opening valve core 3, the cross adapter B41, and the cross adapter A42 are all located inside the fixing sleeve 43. The pushing member 4 is installed on the right end of the fixing sleeve 43 by screws. In actual implementation, a frame can also be set to connect the pushing member 4 and the ejection cylinder 1. The piston rod 6 of the pushing member 4 is threadedly connected to the right end of the cross adapter B41. In actual implementation, connection methods such as interference fit and flange can also be used for connection.

[0050] Combined Figure 1 、 Figure 4 、 Figure 6 and Figure 7 As shown in, two push rods 17 are horizontally arranged in the first chamber 11. In this embodiment, the hydraulic damper is also located in the first chamber 11. The hydraulic damper includes a damping component 8, an accumulator 7, two hydraulic cylinders 5, two piston rods 6, and two springs 62. The two hydraulic cylinders 5 and the two push rods 17 are evenly spaced along the circumference of the piston 16. The left end of the push rod 17 penetrates through the left end of the first chamber 11 and is slidably sealed with the left end of the ejection cylinder 1.

[0051] The hydraulic cylinders 5, piston rods 6, and springs 62 correspond to each other one by one. Taking one of the hydraulic cylinders 5 as an example, the left end of the hydraulic cylinder 5 is installed on the inner wall of the first chamber 11 by screws. The piston rod 6 is arranged horizontally. In this embodiment, the push rod 17, the hydraulic cylinder 5, and the piston rod 6 are all parallel. The hydraulic cylinder 5 is provided with an inner cavity 52. The left end of the piston rod 6 is located in the inner cavity 52 and is slidably sealed with the hydraulic cylinder 5. The right end of the piston rod 6 is installed with a cover plate 61 by screws, and the cover plate 61 is located on the left side of the piston 16 and is parallel to the piston 16.

[0052] The spring 62 is sleeved on the hydraulic cylinder 5 and the piston rod 6, and the right end of the spring 62 abuts against the cover plate 61, and the left end abuts against the outer wall of the hydraulic cylinder 5. In actual implementation, the left end of the spring 62 can also abut against the left side wall of the first chamber 11, so that the piston rod 6 is in a state of sliding out of the inner cavity 52 under the action of the spring 62.

[0053] The accumulator 7 is provided with an accumulator cavity 71, and the accumulator cavity 71 stores fluid and buffer gas. Therefore, the volume of the stored fluid is less than the volume of the accumulator cavity 71. In this embodiment, the fluid is hydraulic oil and the buffer gas is nitrogen. Since the density of nitrogen is less than the density of hydraulic oil, the hydraulic oil is located at the bottom of the accumulator cavity 71. The left end of the inner cavity 52 is communicated with the damping component 8 through a pipeline. Specifically, the damping component 8 in this embodiment is the same as the existing hydraulic damper, and will not be elaborated in this embodiment. The damping component 8 is communicated with the bottom of the accumulator cavity 71 through another pipeline, so that the hydraulic oil in the inner cavity 52 enters the accumulator cavity 71 after passing through the damping component 8.

[0054] The bottom of the accumulator 7 is also communicated with a liquid inlet component 9 through a pipeline. In this embodiment, the liquid inlet component 9 is a hydraulic pump. By introducing hydraulic oil into the accumulator cavity 71 through the liquid inlet component 9, the oil pressure in the accumulator cavity 71 can be further increased, and then the maximum buffer energy and maximum buffer speed of the damper can be further improved, and the piston 16 with a greater impact energy can be buffered.

[0055] In this embodiment, a liquid discharge channel 51 is also provided in the side wall of the hydraulic cylinder 5. The right end of the liquid discharge channel 51 is L-shaped and serves as a liquid inlet. The liquid inlet faces the piston rod 6 and is located on the right side of the part where the piston rod 6 is slidably sealed with the inner cavity 52, so that the hydraulic oil leaking from between the piston rod 6 and the side wall of the inner cavity 52 can be discharged from the liquid discharge channel 51. The left end of the liquid discharge channel 51 is a liquid discharge port. A liquid discharge pipe is clamped at the liquid discharge port, and the liquid discharge pipe penetrates through the side wall of the ejection cylinder 1 and extends to the outside. In this embodiment, the liquid discharge pipe is a metal pipe, and the liquid discharge pipe is welded to the side wall of the ejection cylinder 1.

[0056] The specific implementation process is as follows:

[0057] Before the test, manually start the pusher 4 first, push the opening valve core 3 to the left, so that the left end of the opening valve core 3 presses against the right wall of the cylinder end cover 14 to close the communication hole. Then close the pusher 4 and the air supply opening member, and send compressed gas into the air storage tank 2. The gas enters the intake cavity 13 synchronously through the opening 21. When the pressures in the intake cavity 13 and the air storage tank 2 reach the requirements, close the air supply opening member, start the pusher 4, and control the opening valve core 3 to slide to the right through the pusher 4. The opening valve core 3 releases the communication port 15, and the compressed gas in the intake cavity 13 and the air storage tank 2 quickly enters the space on the left side of the piston 16 of the ejection cylinder 1, so that the piston 16 and the piston rod 6 of the ejection cylinder 1 quickly slide to the left.

[0058] After the piston 16 slides to the left for a certain distance and abuts against the cover plate 61, the leftward acting force exerted by the piston 16 on the cover plate 61 pushes the piston rod 6 to the left, increasing the pressure in the inner cavity 52, so that the hydraulic oil in the inner cavity 52 enters the energy storage cavity 71 through the damping member 8 for storage. After the hydraulic oil enters the energy storage cavity 71, it will further increase the oil pressure in the energy storage cavity 71. Therefore, the maximum buffering energy and the maximum buffering speed of the hydraulic damper in this embodiment are relatively large. When the inventor conducted the test, the maximum buffering energy of the hydraulic damper in this embodiment reached about 2500 J, and the maximum buffering speed was about 16.7 m / s, which was much higher than the maximum buffering speed of 8 m / s of the currently commonly used hydraulic damper, and the buffering effect was significantly improved.

[0059] When it is necessary to increase the impact energy to improve the ejection and impact effects of the push rod 17, increase the pressure between the opening valve core 3 and the cylinder end cover 14 through the pusher 4 to improve the sealing effect of the opening valve core 3 on the communication port 15. In actual implementation, the sealing effect on the communication port 15 can also be improved by adhesively bonding an elastic sealing gasket to the left end of the opening valve core 3. Then, more compressed gas is filled into the air storage tank 2 to increase the pressures in the air storage tank 2 and the intake cavity 13.

[0060] When it is necessary to increase the buffering effect on the piston 16, introduce hydraulic oil into the energy storage cavity 71 through the liquid inlet member 9 to further increase the oil pressures in the energy storage cavity 71 and the inner cavity 52. In actual implementation, the energy storage cavity 71 can also be connected to external devices such as air pumps and air compressors, and buffer gas is filled into the energy storage cavity 71 through the above devices, as long as it is ensured that there is still hydraulic oil at the bottom of the energy storage cavity 71 when no buffering is carried out. The filled buffer gas can also increase the oil pressures in the energy storage cavity 71 and the inner cavity 52, further improving the buffering effect. Therefore, the ejection effect of the ejection unit and the buffering effect of the hydraulic damping unit in this embodiment can both be adjusted according to the needs of the test to meet different test requirements.

[0061] The above are only embodiments of the present invention, and common general technical solutions and / or features in the solutions are not described in detail herein. It should be noted that for those skilled in the art, without departing from the technical solutions of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by this application shall be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. An impact system, characterized in that: It includes an ejection unit and a hydraulic damper. The ejection unit includes an ejection cylinder, a gas storage tank, and an air supply member. The air supply member is communicated with the gas storage tank. An ejection chamber and an air inlet chamber are provided in the ejection cylinder. A piston is slidably fitted in the ejection chamber. The piston divides the ejection chamber into a first chamber and a second chamber. A cavity is provided in the ejection cylinder. A cylinder end cover is provided at the right part of the cavity. The air inlet chamber is formed by the space on the right side of the cylinder end cover. A communication port for communicating the air inlet chamber with the second chamber is provided on the inner wall of the ejection cylinder. The air inlet chamber is communicated with the gas storage tank. An opening valve core is slidably provided in the air inlet chamber. The opening valve core is opposite to the communication port and is used to close the communication port. The opening valve core is connected with a pushing member for pushing the opening valve core to slide. A push rod is provided in the first chamber. One end of the push rod is fixed to the piston, and the other end passes through the side wall of the ejection cylinder and extends to the outside of the ejection cylinder. The push rod is slidably sealed with the side wall of the ejection cylinder. The hydraulic damper is located in the first chamber. The hydraulic damper includes a hydraulic cylinder, a piston rod, a damping member, and an energy accumulator. The hydraulic cylinder is installed on the inner wall of the first chamber. An inner cavity is provided in the hydraulic cylinder. One end of the piston rod is located in the inner cavity and is slidably sealed with the hydraulic cylinder, and the other end faces the piston. An energy storage chamber is provided in the energy accumulator. The damping member is located between the energy accumulator and the inner cavity, and both ends of the damping member are respectively communicated with the energy storage chamber and the inner cavity. A buffer gas is stored in the energy storage chamber.

2. The impact system according to claim 1, characterized in that: A connection assembly is provided between the opening valve core and the pushing member. The connection assembly includes a cross joint A and a cross joint B. The cross joint A is connected with the pushing member. A first guide groove is provided at one end of the opening valve core away from the communication port. A second guide groove is provided at one end of the cross joint A close to the communication port. The included angle between the projection of the first guide groove along the axial direction of the cross joint B and the second guide groove is less than or equal to 90°. Guide blocks are fixed at both ends of the cross joint B. The two guide blocks are respectively located in the first guide groove and the second guide groove.

3. An impact system according to claim 2, characterized in that: The two guide blocks are respectively slidably fitted with the first guide groove and the second guide groove, and the width of the end of the guide block away from the cross joint B is greater than the width of the end close to the cross joint B.

4. An impact system according to claim 2, characterized in that: The pushing member is located outside the air inlet chamber. One end of the opening valve core away from the communication port passes through the side wall opposite to the communication port of the air inlet chamber and is slidably sealed with the side wall.

5. The impact system according to claim 4, wherein: The cross-sectional shape of the opening valve core along the axial direction is T-shaped. An annular limiting side wall is formed on the opening valve core. An annular buffer pad is fixed on the limiting side wall.

6. An impact system according to claim 5, characterized in that: A valve core sleeve is provided between the side wall of the air inlet chamber opposite to the communication port and the limiting side wall. The valve core sleeve is sleeved on the opening valve core and is detachably connected with the inner wall of the air inlet chamber. The opening valve core is slidably fitted with the valve core sleeve.

7. An impact system according to claim 1, characterized in that: At least one of the energy storage chamber and the inner cavity is communicated with a liquid inlet member. The liquid inlet member is used to introduce a fluid into the energy storage chamber or the inner cavity communicated with it.

8. An impact system according to claim 1, characterized in that: A fluid is stored in the energy storage chamber. The volume of the fluid is less than the volume of the energy storage chamber.

9. An impact system according to claim 1, characterized in that: There are at least two ejection cylinders and push rods, and all the ejection cylinders and push rods are circumferentially spaced apart.

10. An impact system according to claim 1, characterized in that: The buffer gas is nitrogen or inert gas.

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