High-G-value half-sine impact test device

Abstract

The invention relates to the technical field of half-sine impact tests, in particular to a high-G-value half-sine impact test device which comprises a base, a collided seat, an impact seat, a waveform generator, a gravitational acceleration amplifying seat and an impact cylinder. A gas storage cavity is formed in the base; the collided seat is mounted on the top surface of the base; the impact seat is arranged above the top surface of the impacted seat; the waveform generator is mounted on the top surface of the impact seat; the gravitational acceleration amplification seat is arranged above the top surface of the impact seat; the impact air cylinder vertically penetrates through the air storage cavity, the interior of the cylinder barrel can communicate with the air storage cavity, and the top end of the piston rod is fixedly connected with the impact seat. The high-G-value half-sine impact test device is used for carrying out a half-sine impact test, the impact magnitude can reach 30000 g or above, the pulse width can reach 0.12 ms, the high-G-value half-sine impact test device is suitable for being used for carrying out the half-sine impact test on some electronic components with larger sizes on an aircraft, the ascending section and the descending section of the measured waveform do not distort, and the high-G-value half-sine impact test device is suitable for being used for carrying out the half-sine impact test. And the tested test data meet the expected requirements.

Description

Technical Field

[0001] The invention relates to the technical field of half-sine impact testing, and in particular to a high-G value half-sine impact testing device. Background Art

[0002] When the aircraft's mechanical structure and its electronic components are working, they are often exposed to dynamic environments such as turbulence, explosion, shock and vibration. Among them, shock refers to a high-level input force pulse acting on the equipment in a short period of time, including mechanical shock, explosion separation shock and ballistic shock. Half-sine shock is a common form of shock.

[0003] Usually, electronic components are used as test pieces, and the half-sine shock test adopts the drop shock form or the pneumatic shock form. Both forms use the impact seat to impact the impact seat, which can only obtain a small impact magnitude, usually below 5000g (g is the acceleration of gravity). The Hopkinson bar can obtain an impact magnitude of about 100000g, and the continuous pulse width is about 0.05ms, which is only suitable for shock testing of small-sized products.

[0004] For some slightly larger electronic components on aircraft, the half-sine shock test requires the shock level to reach more than 30,000g and the pulse width to reach 0.12ms. Therefore, how to make the shock level reach more than 30,000g and the pulse width reach 0.12ms has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] The invention provides a high G value half-sine impact test device, which is used to solve the problem of how to make the impact magnitude reach above 30000g and the pulse width reach 0.12ms.

[0006] The present invention provides a high G value half-sine impact test device, comprising:

[0007] A base having an air storage cavity formed therein;

[0008] An impact seat is installed on the top surface of the base;

[0009] An impact seat, arranged above the top surface of the impact seat;

[0010] A waveform generator is installed on the top surface of the impact seat;

[0011] The gravity acceleration amplifying seat is arranged above the top surface of the impact seat, and the top surface is suitable for installing the test piece;

[0012] The elastic suspension member has an axis vertically arranged and a bottom end mounted on the top surface of the gravity acceleration amplifying seat;

[0013] The impact cylinder is vertically arranged in the air storage chamber, the interior of the cylinder can be communicated with the air storage chamber, and the top end of the piston rod is fixedly connected to the impact seat, which can drive the impact seat to move up and down.

[0014] In some of these embodiments, the ratio of the weight of the impact mount to the weight of the gravity acceleration amplification mount is greater than ten.

[0015] In some embodiments, it also includes:

[0016] A guide rod, the axis of which is vertically arranged, and the bottom end of which is fixedly connected to the impact seat;

[0017] A guide hole for the guide rod to pass through is formed on the gravity acceleration amplifying seat.

[0018] In some embodiments, it also includes:

[0019] The impact panel is installed on the bottom surface of the impact seat.

[0020] In some embodiments, the base comprises:

[0021] The lower seat body has an air storage cavity formed therein;

[0022] The upper seat body is installed on the top surface of the upper seat body, and at least one side is provided with an air charging port connected to the air storage cavity;

[0023] The top cover is installed on the top surface of the upper seat body, and the top surface is equipped with a collision seat.

[0024] In some of the embodiments, a clearance hole is formed in the middle portion of the top cover;

[0025] Also includes:

[0026] The hydraulic disc brake is installed in the clearance hole and sleeved on the piston rod of the impact cylinder, and can brake the piston rod of the impact cylinder.

[0027] In some embodiments, it also includes:

[0028] The upper valve is installed in the clearance hole and is located at the top of the cylinder barrel of the impact cylinder. An upper air inlet and an upper air outlet are provided. The upper air inlet and the upper air outlet are respectively communicated with the inside of the cylinder barrel of the impact cylinder.

[0029] The lower valve is installed at the bottom end of the cylinder barrel of the impact cylinder and is provided with a lower air inlet and a lower air outlet; the lower air inlet and the lower air outlet are respectively communicated with the interior of the cylinder barrel of the impact cylinder;

[0030] When the gas in the air storage chamber flows into the cylinder barrel of the impact cylinder through the lower air inlet, the piston and piston rod of the impact cylinder move upward; when the gas in the air storage chamber flows into the cylinder barrel of the impact cylinder through the upper air inlet, the piston and piston rod of the impact cylinder move downward.

[0031] In some embodiments, it also includes:

[0032] A shock absorber is mounted on the bottom surface of the base;

[0033] The base is mounted on the bottom surface of the shock absorber.

[0034] In some embodiments, it also includes:

[0035] The bracket is installed on the top surface of the impact seat.

[0036] The beneficial effects of the present invention are as follows: The high-G value half-sine impact test device of the present invention is provided with a piston rod, and the piston rod can drive the impact seat, the waveform generator and the gravity acceleration amplifier seat to move upward. The piston rod can also drive the impact seat and the waveform generator to move downward. Since the impact seat and the waveform generator are affected by their own gravity and the traction force from the piston rod, and the gravity acceleration amplifier seat is only affected by its own gravity, the descending speed of the impact seat and the waveform generator is greater than the descending speed of the gravity acceleration amplifier seat. When the impact seat collides with the impacted seat, it no longer continues to move downward, but turns to move upward, and collides with the gravity acceleration amplifier seat that is moving downward, so that the speed change of the gravity acceleration amplifier seat increases, thereby increasing the impact magnitude. In general, with the help of high-G half-sine shock test equipment, the impact level can reach above 30,000g, and the pulse width can reach 0.12ms, which is suitable for half-sine shock tests on some larger electronic components on aircraft. The rising and falling sections of the measured waveform will not be distorted, and the test data meets the expected requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the structure of some specific embodiments of a high G value half-sine impact test device of the present invention;

[0038] Figure 2 yes Figure 1 A side view of the high G half-sine impact test apparatus shown;

[0039] Figure 3 yes Figure 1 A top view of the high G half-sine impact test apparatus shown;

[0040] Figure 4 yes Figure 1 A cross-sectional view of a hydraulic disc brake along the axial direction in a high G-value half-sine impact test device shown;

[0041] Figure 5 yes Figure 1 A cross-sectional view of the upper valve along the axial direction in the high G value half-sine impact test device shown;

[0042] Figure 6 yes Figure 1 A cross-sectional view of the lower valve in the high G value half-sine impact test device shown in the figure along the axial direction;

[0043] Figure 7 is used Figure 1 The waveform generated by the half-sine shock test performed by the high-G half-sine shock test device shown.

[0044] In the accompanying drawings, 110, base; 111, lower seat body; 112, upper seat body; 1121, inflation port; 113, top cover; 120, impact seat; 130, impact seat; 140, waveform generator; 150, gravity acceleration amplification seat; 160, impact cylinder; 161, cylinder barrel; 162, piston rod; 163, piston; 170, elastic suspension; 180, guide rod; 191, impact panel; 192, hydraulic disc brake; 193, upper valve; 194, lower valve; 195, shock absorber; 196, base; 197, bracket; 198, positioning plate. DETAILED DESCRIPTION

[0045] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] As described in the background technology, for some slightly larger electronic components on aircraft, the half-sine shock test requires the shock level to reach more than 30,000g and the pulse width to reach 0.12ms. Therefore, how to make the shock level reach more than 30,000g and the pulse width reach 0.12ms has become a technical problem that needs to be solved urgently by those skilled in the art.

[0047] To solve the above problems, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7The present invention provides a high-G value half-sine impact test device, including a base 110, a hit seat 120, an impact seat 130, a waveform generator 140, a gravity acceleration amplifier seat 150 and an impact cylinder 160. An air storage chamber is formed inside the base 110, and high-pressure gas is stored in the air storage chamber. The hit seat 120 is installed on the top surface of the base 110. The hit seat 120 is supported by the base 110. The impact seat 130 is arranged above the top surface of the hit seat 120. The waveform generator 140 is installed on the top surface of the impact seat 130, and can enable the gravity acceleration amplifier seat 150 to generate an impact waveform with a required pulse width. The gravity acceleration amplifier seat 150 is arranged above the top surface of the impact seat 130, and the top surface is suitable for installing test pieces such as electronic components of spacecraft. The impact cylinder 160 is vertically penetrated in the air storage chamber, and the inside of the cylinder 161 can be connected to the air storage chamber. The top end of the piston rod 162 of the impact cylinder 160 is fixedly connected to the impact seat 130 , and can drive the impact seat 130 to move up and down.

[0048] The process and principle of conducting a half-sine impact test with the help of a high-G half-sine impact test device are as follows:

[0049] First, the high-pressure gas in the gas storage chamber flows from the bottom into the cylinder 161 of the impact cylinder 160, causing the piston rod 162 to move upward, thereby driving the impact seat 130, the waveform generator 140, and the gravity acceleration amplifier 150 to move upward. When the bottom surface of the impact seat 130 is 0.85m higher than the top surface of the impact seat 120, the piston rod 162 stops moving upward. Next, the high-pressure gas in the gas storage chamber flows from the top into the cylinder 161 of the impact cylinder 160, causing the piston rod 162 to move downward, thereby driving the impact seat 130 and the waveform generator 140 to move downward. Since the impact seat 130 and the waveform generator 140 are subject to their own gravity and the traction force from the piston rod 162, while the gravity acceleration amplifier 150 is only subject to its own gravity, the descending speed of the impact seat 130 and the waveform generator 140 is greater than the descending speed of the gravity acceleration amplifier 150. When the impact seat 130 collides with the impacted seat 120, it stops moving downward and turns to move upward, and collides with the gravity acceleration amplifier seat 150 that is moving downward, so that the velocity change of the gravity acceleration amplifier seat 150 increases, thereby increasing the impact magnitude. Overall, by using the high-G value half-sine impact test device to conduct a half-sine impact test, the impact magnitude can reach more than 30,000g, and the pulse width can reach 0.12ms, which is suitable for some slightly larger electronic components on the aircraft to conduct half-sine impact tests. The rising and falling sections of the measured waveform will not be distorted, and the test data meets the expected requirements.

[0050] It should be noted that the collision process between the impact seat 130 and the impacted seat 120 conforms to the law of conservation of momentum. The collision process between the impact seat 130 and the gravity acceleration amplifier seat 150 also conforms to the law of conservation of momentum. Assume that the mass of the impact seat 130 is m1, the mass of the gravity acceleration amplifier seat 150 is m2, the movement stroke of the piston rod 162 of the impact cylinder 160 is L, the diameter of the cylinder barrel 161 of the impact cylinder 160 is R, the pressure of the impact cylinder 160 is P, and the initial pressure in the air storage chamber is P C , the volume of the air storage chamber is V C , the speed of the impact seat 130 when colliding with the impacted seat 120 is V0. Assume that before the impact seat 130 collides with the gravity acceleration amplifying seat 150, the speed of the impact seat 130 is V1, and the speed of the gravity acceleration amplifying seat 150 is V2; after the impact seat 130 collides with the gravity acceleration amplifying seat 150, the speed of the impact seat 130 is V1', and the speed of the gravity acceleration amplifying seat 150 is V2'.

[0051] When the impact seat 130 collides with the impacted seat 120:

[0052]

[0053] According to the law of conservation of kinetic energy:

[0054]

[0055] According to collision theory:

[0056] m1v1+m21v2=m1v1+m22

[0057] Assuming that the collision time between the impact seat 130 and the gravity acceleration amplifying seat 150 is Δt, and the magnitude of acceleration generated by the gravity acceleration amplifying seat 150 is G, it can be calculated that:

[0058]

[0059] If a half-sine waveform is to be generated, the stiffness K of the waveform generator 140 should satisfy:

[0060]

[0061] According to the above formula, the peak value and duration of the ideal impact acceleration spectrum can be obtained.

[0062] Preferably, the impact seat 120 is detachably mounted on the top surface of the base 110 by bolts, so as to facilitate the disassembly and assembly of the impact seat 120. The waveform generator 140 is detachably mounted on the top surface of the impact seat 130 by bolts, so as to facilitate the disassembly, replacement and installation of the waveform generator 140.

[0063] Preferably, the material of the impact seat 120 is iron, which has high strength. The material of the impact seat 130 and the gravity acceleration amplifying seat 150 is aluminum alloy.

[0064] Preferably, the waveform generator 140 includes a rubber spring and a metal spring. The metal spring is embedded in the rubber spring, and its cross section is a grid structure, and is integrally formed with the rubber spring. In this way, it is beneficial for the gravity acceleration amplifier 150 to generate a semi-sine waveform with an impact magnitude of more than 30,000 g and a pulse width of more than 0.10 ms. Assume that the stiffness of the waveform generator formed by the rubber spring and the metal spring connected in parallel is K2, and the compressive stiffness of the metal spring is K j , the stiffness of the rubber spring is K x , the elastic modulus of metal material is E j , the section moment of inertia of the metal material is I j , X 2 dA j It is the integral of the product of the area of ​​each microelement of the metal material and the square of the distance from each microelement to a specified axis on the cross section. The material of the rubber spring is rubber material, and the elastic modulus of the rubber material is E a2 , the cross-sectional area of ​​the rubber spring is A x , the axial height of the rubber spring is H2, the correction coefficient of the rubber material is β2, β2 is between 0-1, then:

[0065]

[0066] Preferably, the volume of the air storage chamber is 2 to 3 times the volume of the interior of the cylinder barrel 161 of the impact cylinder 160 .

[0067] Preferably, the gravity acceleration amplifier 150 is an inverted polygonal pyramid structure. The impact seat 130 is an inverted polygonal pyramid structure. It should be noted that the structural strength of the gravity acceleration amplifier 150 needs to be checked according to the highest test level, and its natural frequency should be greater than 1 / 2Δt. An acceleration sensor is installed on the top surface of the gravity acceleration amplifier 150.

[0068] Preferably, the ratio of the weight of the impact seat 130 to the weight of the gravity acceleration amplifying seat 150 is greater than 10, which is conducive to the gravity acceleration amplifying seat 150 obtaining a higher acceleration G value, thereby achieving a larger impact magnitude.

[0069] In some practical applications, the top surface size of the gravity acceleration amplifier 150 is 150mm×150mm or more. Some slightly larger electronic components are installed on the top surface of the gravity acceleration amplifier 150 by bolts. The bore of the cylinder 161 of the impact cylinder 160 is 250mm, the movement stroke of the piston rod 162 is 0.85m, the volume of the air storage chamber is 3 times the volume inside the cylinder 161 of the impact cylinder 160, the weight of the impact seat 130 is about 135kg, and the weight of the gravity acceleration amplifier 150 is about 12kg. Before conducting a half-sine impact test, with the help of the piston rod 162, the bottom surface of the impact seat 130 is made 0.85m higher than the top surface of the impacted seat 120, and the air storage chamber is pressurized to 0.75MPa. When conducting a half-sine impact test, the gravity acceleration amplifier 150 and the test piece produced the following Figure 7 The shock level shown is above 30,000 g, and the pulse width is a half-sine waveform of 0.12 ms.

[0070] Specifically, in the exemplary embodiment, the high G value half-sine impact test device further includes two elastic suspension members 170, two guide rods 180, an impact panel 191, four shock absorbers 195, a base 196, a bracket 197 and two positioning plates 198. The bracket 197 includes four vertical rods and a crossbeam. The bottom ends of the two vertical rods are detachably mounted on the top surface of the impact seat 130. Figure 3 As shown, the two positioning plates 198 are both triangular and are respectively installed at the opposite ends of the cross beam to facilitate the positioning and installation of the vertical rods and the guide rods 180. The top ends of the two vertical rods are detachably connected to one end of the cross beam through nuts and one of the positioning plates 198, and the top ends of the other two vertical rods are detachably connected to the other end of the cross beam through nuts and another positioning plate 198. Figure 1As shown, the axes of the two elastic suspension members 170 are both vertically arranged, the bottom ends are respectively mounted on the opposite sides of the top surface of the gravity acceleration amplifier 150, and the top ends are respectively mounted on the opposite ends of the crossbeam. Before the semi-sine impact test, with the help of the two elastic suspension members 170, the bottom surface of the gravity acceleration amplifier 150 can be made higher than the top surface of the waveform generator 140 to meet the test requirements. At the same time, the elastic suspension member 170 can prevent the gravity acceleration amplifier 150 from moving up and down too much. The axes of the two guide rods 180 are both vertically arranged, the bottom ends are respectively fixedly connected to the impact seat 130, and the top ends are respectively detachably connected to the crossbeam through the corresponding positioning plates 198. The opposite sides of the gravity acceleration amplifier 150 are respectively formed with guide holes for the corresponding guide rods 180 to pass through. The two guide rods 180 play a restraining role on the moving direction of the gravity acceleration amplifier 150, ensuring that the high-speed gravity acceleration amplifier 150 moves up and down in the vertical direction. The impact panel 191 is detachably mounted on the bottom surface of the impact seat 130 by bolts. When performing an impact test, the impact panel 191 makes the bottom surface of the impact seat 130 evenly stressed. When damaged, only the impact panel 191 needs to be replaced, without replacing the more expensive impact seat 130, which is beneficial to reducing maintenance and repair costs. The four shock absorbers 195 are detachably mounted on the four sides of the bottom surface of the lower seat body 111 of the base 110 by bolts. When performing an impact test, the shock absorber 195 can play a shock-absorbing role. The base 196 is detachably mounted on the bottom surfaces of the four shock absorbers 195 by bolts, and is used to support the shock absorber 195, the base 110 and the impact seat 120, so that the axes of the shock absorber 195, the base 110 and the impact seat 120 are in a vertical state.

[0071] Preferably, the material of the bracket 197 and the guide rod 180 is stainless steel, which has high rigidity and strength. The bracket 197 improves the rigidity and strength of the overall structure formed by the bracket 197, the guide rod 180 and the gravity acceleration amplifier 150.

[0072] Preferably, each elastic suspension member 170 is a spring.

[0073] Preferably, the middle cross-sectional diameter of each guide rod 180 is larger than the end cross-sectional diameter, which increases the contact area when the guide rod 180 is connected to the impact seat 130, eliminates the need for gaskets, and ensures the stability of the connection.

[0074] Preferably, each shock absorber 195 is a shock absorbing airbag. When the four shock absorbing airbags are inflated, the weight that can be borne should exceed at least 2 times the total weight of the impact device.

[0075] Preferably, the base 196 is made of steel or concrete.

[0076] Specifically, in the exemplary embodiment, the base 110 includes a lower body 111, an upper body 112 and a top cover 113. An air storage chamber is formed inside the lower body 111. The upper body 112 is detachably mounted on the top surface of the upper body 112 by bolts, and at least one side is provided with an air charging port 1121 connected to the air storage chamber, and high-pressure gas is charged into the air storage chamber through the air charging port 1121. The top cover 113 is detachably mounted on the top surface of the upper body 112 by bolts, and the impact seat 120 is mounted on the top surface.

[0077] Preferably, a sealing ring is provided between the top cover 113 and the upper seat body 112. A sealing ring is also provided between the upper seat body 112 and the lower seat body 111. In this way, the sealing performance of the air storage chamber is effectively improved.

[0078] Preferably, the sum of the weights of the lower seat body 111 , the upper seat body 112 and the top cover 113 is not less than 8 tons, which not only meets the requirements of the half-sine impact test but also reduces the manufacturing cost.

[0079] Specifically, in the exemplary embodiment, a clearance hole is formed in the middle of the top cover 113 for installing the upper valve 193 body and the hydraulic disc brake 192. The high G value half-sine impact test device also includes a hydraulic disc brake 192, an upper valve 193 and a lower valve 194. The hydraulic disc brake 192 is installed in the clearance hole and is sleeved on the piston rod 162 of the impact cylinder 160. An oil supply channel is provided on the top cover 113, and the oil supply channel is connected to the hydraulic oil chamber of the hydraulic disc brake 192. When the impact seat 130 rises to a set height along with the piston rod 162, hydraulic oil is filled into the hydraulic oil chamber of the hydraulic disc brake 192 through the oil supply channel, so that the two clamping seats of the hydraulic disc brake 192 move toward each other to clamp and fix the piston rod 162, thereby limiting the upward and downward movement of the piston rod 162 of the impact cylinder 160. Before the impact seat 130 impacts the impacted seat 120 for the second time, hydraulic oil is filled into the hydraulic oil chamber of the hydraulic disc brake 192 through the oil supply channel, so that the two clamping seats of the hydraulic disc brake 192 move toward each other to clamp the fixed piston rod 162, thereby preventing the impact seat 130 from impacting the impacted seat 120 for the second time. The upper valve 193 is installed in the clearance hole and is located at the top end of the cylinder barrel 161 of the impact cylinder 160, and is provided with an upper air inlet and an upper air outlet. The upper air inlet and the upper air outlet are respectively connected to the inside of the cylinder barrel 161 of the impact cylinder 160. An exhaust channel connected to the upper air outlet is provided on the top cover 113. An upper air inlet valve is installed in the upper air inlet. An upper exhaust valve is installed in the upper air outlet. The lower valve 194 is installed at the bottom end of the cylinder barrel 161 of the impact cylinder 160, and is provided with a lower air inlet and a lower air outlet. The lower air inlet and the lower air outlet are respectively connected to the inside of the cylinder barrel 161 of the impact cylinder 160. A lower air inlet valve is installed in the lower air inlet. A lower exhaust valve is installed in the lower air outlet. Before the half-sine impact test, the gas in the air storage chamber flows into the lower part of the cylinder barrel 161 of the impact cylinder 160 through the lower air inlet, and the gas in the upper part of the cylinder barrel 161 is discharged from the upper air outlet, and the piston 163 and the piston rod 162 move upward, thereby driving the impact panel 191, the impact seat 130, the waveform generator 140, the gravity acceleration amplifier seat 150, the guide rod 180 and the bracket 197 to move upward. When performing a half-sine impact test, the gas in the gas storage chamber flows into the upper part of the cylinder barrel 161 of the impact cylinder 160 through the upper air inlet, and the gas in the lower part of the cylinder barrel 161 is discharged from the lower air outlet, and the piston 163 and the piston rod 162 move downward, thereby driving the impact panel 191, the impact seat 130, the waveform generator 140, the guide rod 180 and the bracket 197 to move downward. The overall structure is simple, the natural frequency is high, the stability and reliability of the test are improved, and the test cycle is shortened.

[0080] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0081] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0082] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0083] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0084] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A high G value half-sine impact test device, characterized in that: include: A base having an air storage cavity formed therein; An impact seat is installed on the top surface of the base; An impact seat, disposed above the top surface of the impact seat; A waveform generator is mounted on the top surface of the impact seat; A gravity acceleration amplifying seat is arranged above the top surface of the impact seat, and the top surface is suitable for installing a test piece; An elastic suspension member, with an axis arranged vertically and a bottom end mounted on the top surface of the gravity acceleration amplifying seat; The impact cylinder is vertically arranged in the air storage chamber, the interior of the cylinder can be communicated with the air storage chamber, and the top end of the piston rod is fixedly connected to the impact seat, which can drive the impact seat to move up and down.

2. The high G value half-sine impact test device according to claim 1, characterized in that: The ratio of the weight of the impact seat to the weight of the gravity acceleration amplifying seat is greater than 10.

3. The high G value half-sine impact test device according to claim 1, characterized in that: Also includes: A guide rod, the axis of which is vertically arranged, and the bottom end of which is fixedly connected to the impact seat; A guide hole for the guide rod to pass through is formed on the gravity acceleration amplifying seat.

4. The high G value half-sine impact test device according to claim 1, characterized in that: Also includes: The impact panel is installed on the bottom surface of the impact seat.

5. The high G value half-sine impact test device according to claim 1, characterized in that: The base comprises: A lower seat body, wherein the gas storage cavity is formed inside; An upper seat body is mounted on the top surface of the upper seat body, and at least one side of the upper seat body is provided with an air charging port connected to the air storage cavity; The top cover is installed on the top surface of the upper seat body, and the impact seat is installed on the top surface.

6. The high G value half-sine impact test device according to claim 5, characterized in that: A clearance hole is formed in the middle of the top cover; Also includes: The hydraulic disc brake is installed in the clearance hole and sleeved on the piston rod of the impact cylinder, and can brake the piston rod of the impact cylinder.

7. The high G value half-sine impact test device according to claim 6, characterized in that: Also includes: An upper valve is installed in the clearance hole and is located at the top of the cylinder barrel of the impact cylinder, and is provided with an upper air inlet and an upper air outlet; the upper air inlet and the upper air outlet are respectively communicated with the interior of the cylinder barrel of the impact cylinder; A lower valve is installed at the bottom end of the cylinder barrel of the impact cylinder and is provided with a lower air inlet and a lower air outlet; the lower air inlet and the lower air outlet are respectively communicated with the interior of the cylinder barrel of the impact cylinder; When the gas in the air storage chamber flows into the cylinder barrel of the impact cylinder through the lower air inlet, the piston and piston rod of the impact cylinder move upward; when the gas in the air storage chamber flows into the cylinder barrel of the impact cylinder through the upper air inlet, the piston and piston rod of the impact cylinder move downward.

8. The high G value half-sine impact test device according to claim 1, characterized in that: Also includes: A shock absorber is mounted on the bottom surface of the base; The base is installed on the bottom surface of the shock absorber.

9. The high G value half-sine impact test device according to claim 1, characterized in that: Also includes: The bracket is installed on the top surface of the impact seat.

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