Launch shock simulation experiment system

Abstract

The present invention discloses a launch impact simulation experiment system, including an air intake section, an air outlet section, a damping section, a damping member and a movable valve core, wherein the damping section is coaxially connected to the right side of the air intake section, the air outlet section is vertically connected to the air intake section, the movable valve core is axially sealed and slidably installed in the air intake section and / or the damping section, the movable valve core can open or close the air outlet section by axial sliding, the air intake section is used to introduce high-pressure gas and impact the movable valve core to slide axially to the right to open the air outlet section, and the damping member is installed in the damping section to buffer the kinetic energy of the movable valve core being impacted to slide to the right. In the present invention, when the high-pressure air quickly pushes the movable valve core to move, the damping of the damping member can be used to increase the pressure and delay the movable valve core, so as to prevent the movable valve core from being impacted and rigidly colliding with other components, generating direct force and causing collision damage.

Description

Technical Field

[0001] The invention is used for simulating the impact of gas on equipment, and particularly relates to a launch impact simulation experimental system. Background Art

[0002] For ejection-type thrusters, the gas pressure ejected instantly is extremely high, and the magnitude of the gas pressure directly affects the design requirements of the thruster components and peripheral related components, so a device is needed to simulate the impact of the gas on the equipment;

[0003] Therefore, in order to solve the above problems, a launch impact simulation experiment system is needed to simulate the launch load. At the same time, the device can increase the pressure and delay the impact force of the gas through the movable valve core and the damping structure to prevent the movable valve core from being damaged by rigid impact. Summary of the invention

[0004] In view of this, the present invention provides a launch impact simulation experimental system for simulating launch loads. The device can pressurize and delay the impact force of the gas through a movable valve core and a damping structure to prevent the movable valve core from being damaged by a rigid impact.

[0005] The launch impact simulation experiment system of the present invention comprises an air supply system, an air storage tank and a pressurization delay device, wherein the pressurization delay device comprises an air inlet section, an air outlet section, a damping section, a damping member and a movable valve core, wherein the damping section is coaxially connected to the right side of the air inlet section, the air outlet section is vertically connected to the air inlet section, the movable valve core is axially sealed and slidably installed in the air inlet section and / or the damping section, the axial sliding of the movable valve core can open or close the air outlet section, the air inlet section is used to introduce high-pressure gas and impact the movable valve core to slide axially to the right to open the air outlet section, the damping member is installed in the damping section to buffer the kinetic energy of the movable valve core being impacted to slide to the right, the air outlet end of the air storage tank is connected to the air inlet section, the air outlet end of the air supply system is connected to the air storage tank, the air outlet end of the air supply system is connected to the chamber located on the right side of the movable valve core in the damping section, and valves are arranged between the air outlet end of the air supply system and the air storage tank, between the air outlet end of the air supply system and the damping section, and between the air outlet end of the air storage tank and the air inlet section.

[0006] Furthermore, the damping element includes a buffer piston and an elastic element located on the right side of the movable valve core. The buffer piston is axially slidably matched with the damping section. The elastic element is connected to one axial end of the buffer piston and has an elastic force that prevents the buffer piston from sliding axially to the right. When the movable valve core slides axially to the right to open the air outlet section, it collides with the buffer piston to form a buffer.

[0007] Furthermore, the damping section has a necking section, the buffer piston is axially slidably installed in the necking section, the right end of the movable valve core has a damper, the damper is coaxially arranged with the necking section and the outer diameter of the damper is smaller than the inner diameter of the necking section, when the movable valve core slides axially to the right to open the air outlet section, the damper extends into the necking section and an annular damping gap is formed between the outer circle of the damper and the inner circle of the necking section.

[0008] Furthermore, it also includes a pressure relief section connected to the right end of the damping section, the pressure relief section has a closed chamber, the chamber located on the right side of the buffer piston in the damping section is connected to the pressure relief section chamber through a pressure relief channel, and a pressure relief regulating valve is provided on the pressure relief channel, and the pressure relief regulating valve can adjust the opening of the pressure relief channel.

[0009] Furthermore, the movable valve core includes a hollow left valve body and a right valve body, the right valve body is connected to the right end of the left valve body, the damper is connected to the right end of the right valve body, the right valve body and the damping section are axially sealed and slidably matched, and when the movable valve core slides axially to the left to close the outlet section, the left valve body is used to close the inlet section to prevent the air flow from the inlet section to the outlet section.

[0010] Furthermore, the pressure relief regulating valve includes a regulating valve body arranged on the pressure relief section and a regulating valve stem which is sleeved in the regulating valve body in a manner of axially sliding along the regulating valve body. One end of the regulating valve body is vertically connected to the pressure relief channel, and the other end passes through the outside of the pressure relief section. The outer end of the regulating valve stem passes through the outside of the pressure relief section along the regulating valve body, and the inner end of the regulating valve stem can be driven to extend into the pressure relief channel to thereby adjust the opening of the pressure relief channel.

[0011] Furthermore, the outer circle of the left valve body presents a stepped structure with the left side smaller and the right side larger, the inner cavity of the air inlet section presents a stepped cavity with the inner diameter smaller on the left and larger on the right near the left end, the air outlet section is radially opposite to and connected with the large diameter section of the inner cavity of the air inlet section, the inner diameter of the large diameter section of the air inlet section is larger than the outer diameter of the large diameter section of the left valve body, and a plurality of exhaust grooves are provided in a circumferential array on the left valve body. When the movable valve core axially slides to the left to close the air outlet section, the small diameter end of the left valve body extends into the small diameter section of the inner cavity of the air inlet section and closes the air inlet section, the large diameter section of the left valve body is located at the large diameter section of the inner cavity of the air inlet section, and the inner cavity of the air inlet section is connected with the inner cavity of the left valve body through the exhaust groove.

[0012] Furthermore, a closed connecting disk is provided at the left end face of the pressure relief section, and the damping member also includes a damping tube, which is connected to the connecting disk and extends to the left into the necked section, the buffer piston is sleeved on the damping tube and axially slidingly cooperates with the damping tube, and the inner cavity of the damping tube is connected to the inner cavity of the pressure relief section.

[0013] Furthermore, the buffer piston comprises an outer sleeve and a buffer component installed in the outer sleeve, the right end surface of the outer sleeve has a connecting ring formed by extending radially inward, and the buffer component is fixedly connected to the connecting ring.

[0014] Furthermore, the damper is a hollow structure, and a avoidance hole for the left end of the damping tube to pass through is opened at the right end of the damper.

[0015] Furthermore, the stringing device also includes a vertical driver, and the vertical driver can drive the base to rise and fall.

[0016] Beneficial effects of the present invention:

[0017] In the present invention, the output gas impact strength can be adjusted by adjusting the inflation pressure in the gas storage tank to simulate the launch load; when the high-pressure gas is introduced into the air intake section, the movable valve core is subjected to the impact load and moves rapidly in the damping section. In order to reduce the impact of the movable valve core, a two-stage buffer structure is provided during the sliding of the movable valve core to the right, and the damper and the constricted section constitute a primary buffer structure; the gap between the constricted section and the damper is used to control the deflation speed of the movable valve core after opening, thereby reducing the movement speed of the movable valve core; the buffer piston and the elastic member, the secondary buffer air chamber and the pressure relief channel constitute a secondary buffer structure, and the secondary buffer air chamber is used in conjunction with the elastic member to slow down the movement of the movable valve core; the buffer delay performance of the movable valve core can be controlled by the pressure relief regulating valve and the internal air pressure of the damping section;

[0018] The movable valve core can perform axial reciprocating motion. In both directions, the movable valve core runs smoothly throughout the entire process without creeping and vibration. The structure can be used to simulate different intake air pressures, has a wide range of applications, and has good device reliability and can be used for repeated tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the system structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the boost delay device;

[0022] Figure 3 Schematic diagram of the local structure of the boost delay device Figure 1 ;

[0023] Figure 4 Schematic diagram of the local structure of the boost delay device Figure 2 ;

[0024] Figure 5 It is a schematic diagram of the buffer piston structure; DETAILED DESCRIPTION

[0025] The launch impact simulation experiment system of this embodiment includes an air supply system 70, an air storage tank 80 and a pressurization delay device, wherein the pressurization delay device includes an air inlet section 10, an air outlet section 20, a damping section 30, a damping member 40 and a movable valve core 50, wherein the damping section is coaxially connected to the right side of the air inlet section, the air outlet section is vertically connected to the air inlet section, the movable valve core is axially sealed and slidably installed in the air inlet section and / or the damping section, the axial sliding of the movable valve core can open or close the air outlet section, and the air inlet section is used to pass high-pressure gas and The movable valve core is impacted to slide axially to the right to open the air outlet section. The damping member is installed in the damping section to buffer the kinetic energy of the movable valve core being impacted to slide to the right. The air outlet end of the air storage tank 80 is connected to the air inlet section 10, the air outlet end of the air supply system 70 is connected to the air storage tank 80, and the air outlet end of the air supply system is connected to the chamber on the right side of the movable valve core 50 in the damping section. Valves are provided between the air outlet end of the air supply system and the air storage tank, between the air outlet end of the air supply system and the damping section, and between the air outlet end of the air storage tank 80 and the air inlet section 10.

[0026] Combination Figure 1 As shown, the air supply system includes an air compressor 71, an adsorption dryer 72 and a high-pressure filter 73, wherein the adsorption dryer 72 is installed at the air outlet of the air compressor 71, and the high-pressure filter 73 is installed at the air outlet of the adsorption dryer 72. The air outlet end of the high-pressure filter 73 is connected to the air storage tank 80 and the inner cavity of the damping section 30 through a pipeline 74. A valve I 75 is provided on the pipeline between the air outlet end of the high-pressure filter 73 and the air storage tank 80, a valve II 76 is provided on the pipeline between the air outlet end of the high-pressure filter 73 and the inner cavity of the damping section 30, and a valve III 77 is provided between the air outlet end of the air storage tank 80 and the air inlet section 10; in addition, an experimental tooling 91 is externally connected to the air outlet section 20, and a quick-opening solenoid valve 65 is also provided on the pressurization delay device, and the quick-opening solenoid valve is used to quickly exhaust the air in the pressurization delay device;

[0027] When the air storage tank 80 is charged, the time for the air pressure in the air storage tank 80 to reach 9MPa is no more than 1 hour. The working pressure of the air compressor is not less than 10MPa, and the air cooling method is adopted. The working parameters of the adsorption dryer 72 and the high-pressure filter 73 match the high-pressure air compressor, and the filtration requirement is not less than Class C; the air storage tank 80 is placed horizontally, and is mainly composed of a charging valve, a gas tank, a pressure gauge, a safety valve, a pressure relief valve, etc. The air storage tank 80 is provided with a sewage outlet.

[0028] After the experimental fixture 91 is installed in place and the test system is debugged, the test begins; before the test, close the quick-opening solenoid valve, open valve II 76, and fill the boost delay device with air of a specified pressure, which is used to control the pressure of the chamber on the right side of the active valve core 50 in the boost delay device; then close valve II 76, open valve I 75, and fill the air tank with air of a specified pressure; after the inflation is completed, close valve I 75, open valve III 77, let the air in the air tank contact the active valve core, and then open the quick-opening solenoid valve 65. After the quick-opening solenoid valve 65 is opened, the gas pressure in the boost delay device drops rapidly; the high-pressure gas in the gas tank 80 quickly pushes open the active valve core, the air outlet section 20 is opened, and the high-pressure air enters the experimental fixture and impacts the test piece;

[0029] In this implementation, the left and right directions are Figure 2 The axial directions of the air intake section 10 and the damping section 30 are consistent; being installed in the air intake section and / or the damping section means that the movable valve core 50 can be installed in the air intake section 10 or in the damping section 30 alone, or a part of the movable valve core 50 can be installed in the air intake section 10 and the rest of the movable valve core 50 can be installed in the damping section 30;

[0030] Combination Figure 2 As shown, a three-way pipe 11 is connected between the air intake section 10 and the damping section 30, the vertically downward part of the three-way pipe 11 serves as the air outlet section 20, and the horizontal section of the three-way pipe 11 serves as a part of the air intake section 10; the air intake section 10 is externally connected to an air intake check valve, and two pressure sensors are arranged in the middle of the air intake section 10, through which the air pressure change of the air intake section 10 is monitored, and a pressure relief bolt is also arranged on the air intake section 10, and the pressure relief threshold can be set according to actual use requirements; two pressure sensors are arranged in the horizontal section of the three-way pipe 11, and two high-pressure proximity switches are installed to monitor the movement of the piston, and the pressure bearing capacity of the high-pressure proximity switch is not less than 20MPa, and a feedback signal is triggered when the movable valve core 50 moves into place;

[0031] like Figure 2 As shown, the movable valve core 50 is in a state of closing the air outlet section 20, the left end of the movable valve core 50 is located in the air inlet section 10 and closes the air inlet section 10, the middle of the movable valve core 50 is located directly above the air outlet section 20, and the right end of the movable valve core 50 is located in the damping section 30; when the movable valve core 50 slides to the right, the left end of the movable valve core 50 slides above the air outlet section 20, so that the air inlet section 10 is connected with the air outlet section 20, and the air outlet section 20 is opened at this time;

[0032] By adjusting the inflation pressure in the gas tank, the impact intensity of the output gas can be adjusted to simulate the launch load; when high-pressure gas is introduced into the air inlet section 10 to simulate the impact of the gas on the equipment, the instantaneous high pressure of the high-pressure gas acts on the left end face of the movable valve core 50, which will push the movable valve core 50 to slide to the right. When the air outlet section 20 is opened, the high-pressure gas flows out through the air outlet section 20. When the high-pressure air quickly pushes the movable valve core 50 to move, the damping of the damping member 40 can be used to increase the pressure and delay the movable valve core 50, so as to prevent the movable valve core 50 from being impacted and rigidly colliding with other components, thereby generating direct force and causing collision damage.

[0033] In this embodiment, the damping member 40 includes a buffer piston 41 and an elastic member 42 located on the right side of the movable valve core 50. The buffer piston 41 is axially slidably matched with the damping section 30. The elastic member is connected to one axial end of the buffer piston 41 and has an elastic force to prevent the buffer piston 41 from sliding axially to the right. When the movable valve core 50 slides axially to the right to open the air outlet section 20, it collides with the buffer piston 41 to form a buffer. Figure 2 As shown, the elastic member is a cylindrical coil spring. Of course, the elastic member can also be a disc spring or other known elastic structures. The elastic member is installed on the right side of the buffer piston 41. The elastic member is connected to the right end of the buffer piston 41 and the right end of the damping section 30. When the buffer piston 41 is impacted and slides to the right, the elastic member is compressed, and the elastic member absorbs energy to buffer the impact force.

[0034] In this embodiment, the damping section 30 has a necking section 30a, the buffer piston 41 is axially slidably installed in the necking section 30a, the right end of the movable valve core 50 has a damper 51, the damper is coaxially arranged with the necking section and the outer diameter of the damper is smaller than the inner diameter of the necking section, when the movable valve core 50 slides axially to the right to open the air outlet section 20, the damper extends into the necking section and an annular damping gap is formed between the outer circle of the damper and the inner circle of the necking section.

[0035] The damping section 30 includes a primary damping section 31 and a secondary damping section 32, wherein the right end of the primary damping section 31 and the left end of the secondary damping section 32 are provided with connecting flanges, and the two are coaxially sealed and connected through the connecting flanges, and the left end of the primary damping section 31 is coaxially sealed and connected with the right port of the three-way pipe 11; two pressure sensors are provided in the secondary damping section 32 for monitoring the pressure change in the damping tube, and two high-pressure proximity switches are provided on the right side of the active valve core 50 in the primary damping section 31 for monitoring the movement of the piston, and the pressure bearing capacity of the high-pressure proximity switch is not less than 20MPa, and a feedback signal is triggered when the active valve core 50 moves into place;

[0036] The constricted section 30a is located at the left end of the secondary damping section 32, that is, the inner cavity of the secondary damping section 32 is a stepped cavity with a small left side and a large right side. The elastic member is installed in the large diameter cavity of the secondary damping section 32, and its small diameter section is the constricted section. The inner diameter of the constricted section is smaller than the inner diameter of the primary damping section 31. The outer diameter of the damper 51 is slightly smaller than the outer diameter of the constricted section. The outer diameter of the damper is preferably 2-6 mm smaller than the outer diameter of the constricted section. That is to say, when the damper is extended into the constricted section, an annular damping gap of 1-3 mm is formed between the outer circle of the damper and the inner circle of the constricted section. When the damper is extended into the constricted section When the air between the damper and the buffer piston 41 is compressed, the air between the right end of the right valve body 53 and the left end of the secondary damping section 32 is compressed accordingly, forming a compression damping force. The setting of the annular gap is conducive to the precise matching of the damper and the necking section. The setting of the damping gap is also conducive to the adaptive circulation of the air between the damper and the buffer piston 41 and the air between the right end of the right valve body 53 and the left end of the secondary damping section 32, thereby adjusting the gas flow rate and ensuring that the air pressure on both sides is roughly equal, thereby ensuring that the pressure acting on the damper and the pressure acting on the right end of the right valve body 53 are roughly equal.

[0037] In this embodiment, a pressure relief section 60 connected to the right end of the damping section 30 is further included. The pressure relief section 60 has a closed chamber. The chamber on the right side of the buffer piston 41 in the damping section 30 is connected to the chamber of the pressure relief section 60 through a pressure relief channel 61. A pressure relief regulating valve 62 is provided on the pressure relief channel 61. The pressure relief regulating valve can adjust the opening of the pressure relief channel 61. Figure 4 As shown,

[0038] The air outlet of the air supply system is connected to the pressure relief section 60 and further to the inner cavity of the damping section. At the left end face of the pressure relief section 60, a pressure relief pipe 64 is connected, wherein the inner cavity of the pressure relief pipe serves as a pressure relief channel 61. A quick-opening solenoid valve 65 can be externally connected to the right end of the pressure relief section 60 to adjust the air pressure in the pressure relief section 60; the chamber on the left side of the buffer piston 41 at the tapered section 30a constitutes a first-level buffer air chamber 33, wherein the damper 51 and the tapered section 30a constitute a first-level buffer structure; the space between the buffer piston 41 and the pressure relief section 60 in the second-level damping section 32 forms a second-level buffer air chamber 34, wherein the buffer piston 41, the elastic member 42, the second-level buffer air chamber 34 and the pressure relief channel 61 constitute a second-level buffer structure.

[0039] In this embodiment, the movable valve core 50 includes a hollow left valve body 52 and a right valve body 53. The right valve body 53 is connected to the right end of the left valve body 52, and the damper 51 is connected to the right end of the right valve body 53. The right valve body 53 is axially sealed and slidably matched with the damping section 30. When the movable valve core 50 slides axially to the left to close the air outlet section 20, the left valve body 52 is used to close the air inlet section 10 to prevent the air flow from the air inlet section 10 to the air outlet section 20.

[0040] Combination Figure 2 and Figure 3 As shown, the left valve body is used to close or open the air intake section 10, and the right valve body is used to seal with the damping section 30. The right valve body also mainly serves as a guide to improve the accuracy of the entire movable valve core 50, thereby ensuring that the left valve body can accurately cooperate with the inner cavity of the air intake section 10 when opening or closing the air intake section 10; two valve body sealing rings 54 and two support rings 55 are arranged on the outer circle of the right valve body, and the two valve body sealing rings are located axially between the two support rings to improve the sealing performance and sliding performance of the right valve body.

[0041] In this embodiment, the pressure relief regulating valve 62 includes a regulating valve body disposed on the pressure relief section 60 and a regulating valve stem 62a which is sleeved inside the regulating valve body in a manner of sliding along the axial direction of the regulating valve body. One end of the regulating valve body is vertically connected to the pressure relief channel 61, and the other end passes through the outside of the pressure relief section 60. The outer end of the regulating valve stem passes through the outside of the pressure relief section 60 along the regulating valve body, and the inner end of the regulating valve stem can be driven to extend into the pressure relief channel 61 to adjust the opening of the pressure relief channel 61. When the opening is zero, the pressure relief channel 61 is closed, and when the opening is maximum, the pressure relief channel 61 is fully opened;

[0042] The regulating valve body includes an upper regulating valve body 62b and a lower regulating valve body 62c which are coaxially arranged opposite to each other, wherein the upper regulating valve body 62b is connected to the pressure relief section 60 and is sealed to pass outside the pressure relief section 60, and the lower regulating valve body 62c is vertically welded to the pressure relief pipe 64 to form a similar three-way structure, the upper half of the regulating valve stem is threadedly matched with the upper regulating valve body 62b, the upper end of the regulating valve stem is connected to a rotating hand wheel, and the upper half of the regulating valve stem has a scale line, which can record the opening and closing degree of the regulating valve port each time;

[0043] The lower half of the regulating valve stem 62a extends into the upper regulating valve body 62b and the lower regulating valve body 62c at the same time. The regulating valve stem 62a can be driven to slide from the outside. When the regulating valve stem 62a slides to the bottom, the pressure relief channel 61 is completely closed. When the regulating valve stem 62a is driven to slide upward into the lower regulating valve body 62c, the pressure relief channel 61 is completely opened. The opening of the pressure relief channel 61 can be adjusted by adjusting the sliding position of the regulating valve stem 62a. During assembly, the regulating valve stem is first installed into the upper regulating valve body, and then installed into the pressure relief section 60 to complete the assembly; the high-pressure gas discharge flow in the secondary buffer air chamber 34 is adjusted by the regulating valve, and the optimal flow is selected for different recent pressure sections to minimize the impact on the active valve core 50;

[0044] In the present embodiment, the outer circle of the left valve body 52 is a stepped structure with a smaller left side and a larger right side. The inner cavity of the air intake section 10 is a stepped cavity with a smaller inner diameter on the left and a larger inner diameter on the right side near the left end. The air outlet section 20 is radially opposite to and connected with the large diameter section of the inner cavity of the air intake section 10. The inner diameter of the large diameter section of the air intake section 10 is larger than the outer diameter of the large diameter section of the left valve body 52. ​​A plurality of exhaust grooves 52a are provided in a circumferential array on the left valve body 52. ​​When the movable valve core 50 slides axially to the left to close the air outlet section 20, the small diameter end of the left valve body extends into the small diameter section of the inner cavity of the air intake section 10 and closes the air intake section 10. The large diameter section of the left valve body is located at the large diameter section of the inner cavity of the air intake section 10, and the inner cavity of the air intake section 10 is connected with the inner cavity of the left valve body through the exhaust groove.

[0045] Combination Figure 2 As shown, the end face of the left end small diameter section of the left valve body is an arc-shaped end face, and the end face can also be set as a hemispherical end face, which is conducive to the left valve body sliding to the left to cooperate with the air intake section 10. The entire valve body is a hollow structure, which is conducive to the lightweight design of the movable valve core 50, and is also conducive to the setting of the exhaust groove to assist exhaust; Figure 2 and Figure 3 As shown, when the movable valve core 50 slides to the right and the opening gap of the air inlet section 10 is small, the exhaust groove can assist in exhausting the gas and accelerate the exhaust of the gas.

[0046] In this embodiment, a closed connecting disk 63 is provided at the left end face of the pressure relief section 60, and the damping member 40 also includes a damping tube 43, which is connected to the connecting disk and extends to the left into the necked section 30a, and the buffer piston 41 is sleeved on the damping tube and axially slidably cooperates with the damping tube, and the inner cavity of the damping tube is connected to the inner cavity of the pressure relief section 60.

[0047] Combination Figure 2 and Figure 4 As shown, the damping tube 43 extends into the tapered section 30a so that the left port of the damping tube is connected to the inner cavity of the tapered section, and the right port of the damping tube is connected to the inner cavity of the pressure relief section 60. At this time, the damping tube serves as the pressure relief channel 61 of the first-level buffer air chamber 33; a piston sleeve 44 is also connected to the right end face of the connecting plate 63, and the piston sleeve 44 is coaxially sleeved in the second-level damping section 32. The inner diameter of the piston sleeve 44 is equal to or slightly larger than the outer diameter of the buffer piston 41. The right end of the buffer piston 41 extends to the right from the tapered section and extends into the piston sleeve 44 to form a support. An auxiliary pressure relief annular channel 45 is provided between the outer circle of the piston sleeve 44 and the inner circle of the large diameter section of the second-level damping section 32, and a through hole connected to the auxiliary pressure relief annular channel 45 is opened on the connecting plate 63.

[0048] In this embodiment, the buffer piston 41 includes an outer sleeve 41a and a buffer member 41b installed in the outer sleeve. The right end surface of the outer sleeve has a connecting ring 41c formed by extending radially inward, and the buffer member is fixedly connected to the connecting ring 41c. Figure 4As shown, the sleeve 41a is a metal sleeve, and the buffer is an annular polyurethane, wherein the outer circle of the buffer is sealed with the inner circle of the sleeve, and the buffer is fastened to the connecting ring by screws, and the buffer is axially sealed and slidably sleeved on the damping tube 43, and the sleeve 41a is axially sealed and slidably matched with the inner circle of the tapered section 30a. To prevent the damper 51 from hitting the sleeve 41a, the inner circle of the tapered section 30a is a stepped cavity with a small left side and a large right side, wherein the sleeve 41a is axially slidably matched with the large diameter section of the tapered section, and the inner diameter of the sleeve 41a is equal to or greater than the inner diameter of the small diameter section of the tapered section 30a, so that the outer diameter of the damper 51 is smaller than the inner diameter of the sleeve, and then when the damper 51 slides to the right, it will directly hit the buffer 41b and will not rigidly hit the sleeve.

[0049] In this embodiment, the damper 51 is a hollow structure, and a relief hole 51a is provided at the right end of the damper for the left end of the damping tube 43 to pass through. When the movable valve core 50 slides rightward as a whole, the damping tube 43 passes through the damper 51 to form a relief structure, which is beneficial to increase the axial sliding stroke of the movable valve core 50 and also beneficial to the pressure relief of the primary buffer air chamber.

[0050] When high-pressure gas is suddenly introduced into the air inlet section 10, the movable valve core 50 is subjected to an impact load and quickly slides rightward in the damping section 30. In order to reduce the impact of the movable valve core 50, a two-stage buffer structure is provided during the sliding rightward process of the movable valve core 50. The damper 51 and the constricted section 30a constitute a primary buffer structure. The clearance between the constricted section 30a and the damper is used to control the deflation speed of the movable valve core 50 after it is opened, thereby reducing the movement speed of the movable valve core 50. The buffer piston 41 and the elastic member 42, the secondary buffer air chamber 34 and the pressure relief channel 61 constitute a secondary buffer structure. The secondary buffer air chamber cooperates with the elastic member to slow down the movement of the movable valve core 50.

[0051] A one-way valve is provided on the damping section 30 at the right side of the movable valve core 50. When air is inflated into the damping section 30, the air pressure of each air chamber in the damping section 30 can be adjusted. When air is released through the quick-opening solenoid valve 65, the air pressure in the damping section 30 decreases accordingly. Therefore, the buffering delay performance of the movable valve core 50 can be controlled by the pressure relief regulating valve 62 and the internal air pressure of the damping section 30. The movable valve core 50 can reciprocate axially. In both directions, the movable valve core 50 runs smoothly throughout the entire process without creeping and vibration. Moreover, the structure can be used for simulating different intake air pressures, has a wide range of applications, and has good device reliability and can be used for repeated tests.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A launch impact simulation experimental system, Features: The invention comprises an air supply system, an air storage tank and a pressurization delay device, wherein the pressurization delay device comprises an air inlet section, an air outlet section, a damping section, a damping member and a movable valve core, wherein the damping section is coaxially connected to the right side of the air inlet section, the air outlet section is vertically connected to the air inlet section, the movable valve core is axially sealed and slidably installed in the air inlet section and / or the damping section, the axial sliding of the movable valve core can open or close the air outlet section, the air inlet section is used to introduce high-pressure gas and impact the movable valve core to slide axially to the right to open the air outlet section, the damping member is installed in the damping section to buffer the kinetic energy of the movable valve core being impacted to slide to the right, the air outlet end of the air storage tank is connected to the air inlet section, the air outlet end of the air supply system is connected to the air storage tank, the air outlet end of the air supply system is connected to the chamber on the right side of the movable valve core in the damping section The air supply system and the air storage tank are connected, and valves are arranged between the air supply system outlet and the air storage tank, between the air supply system outlet and the damping section, and between the air storage tank outlet and the air inlet section; the damping member comprises a buffer piston and an elastic member located on the right side of the movable valve core, the buffer piston and the damping section are axially slidingly matched, the elastic member is connected to one axial end of the buffer piston and has an elastic force to prevent the buffer piston from sliding axially to the right, and when the movable valve core slides axially to the right to open the air outlet section, it collides with the buffer piston to form a buffer; the buffer piston comprises an outer sleeve and a buffer member installed in the outer sleeve, the right end face of the outer sleeve has a connecting ring formed by radially extending inward, and the buffer member is fixedly connected to the connecting ring; the damping section has a necking section, and the buffer piston is axially slidingly fitted and installed in the necking section.

2. The launch impact simulation experimental system according to claim 1, Features: The right end of the movable valve core is provided with a damper, which is coaxially arranged with the necking section and has an outer diameter smaller than an inner diameter of the necking section. When the movable valve core axially slides to the right to open the air outlet section, the damper extends into the necking section and an annular damping gap is formed between the outer circle of the damper and the inner circle of the necking section.

3. The launch impact simulation experimental system according to claim 2, Features: It also includes a pressure relief section connected to the right end of the damping section, the pressure relief section has a closed chamber, the chamber on the right side of the buffer piston in the damping section is connected to the pressure relief section chamber through a pressure relief channel, and a pressure relief regulating valve is provided on the pressure relief channel, and the pressure relief regulating valve can adjust the opening of the pressure relief channel.

4. The launch impact simulation experimental system according to claim 3, Features: The movable valve core includes a hollow left valve body and a right valve body, the right valve body is connected to the right end of the left valve body, the damper is connected to the right end of the right valve body, the right valve body and the damping section are axially sealed and slidably matched, when the movable valve core axially slides to the left to close the outlet section, the left valve body is used to close the inlet section to prevent the air flow from the inlet section to the outlet section.

5. The launch impact simulation experimental system according to claim 4, Features: The pressure relief regulating valve includes a regulating valve body arranged on the pressure relief section and a regulating valve stem which is sleeved in the regulating valve body in a manner of axially sliding along the regulating valve body. One end of the regulating valve body is vertically connected to the pressure relief channel, and the other end passes through the outside of the pressure relief section. The outer end of the regulating valve stem passes through the outside of the pressure relief section along the regulating valve body, and the inner end of the regulating valve stem can be driven to extend into the pressure relief channel to adjust the opening of the pressure relief channel.

6. The launch impact simulation experimental system according to claim 5, Features: The outer circle of the left valve body presents a stepped structure with the left side being smaller and the right side being larger, the inner diameter of the inner cavity of the air inlet section near the left end presents a stepped cavity with the inner diameter being smaller on the left and larger on the right, the air outlet section is radially opposite to and connected with the large diameter section of the inner cavity of the air inlet section, the inner diameter of the large diameter section of the air inlet section is larger than the outer diameter of the large diameter section of the left valve body, a plurality of exhaust grooves are provided in a circumferential array on the left valve body, when the movable valve core axially slides to the left to close the air outlet section, the small diameter end of the left valve body extends into the small diameter section of the inner cavity of the air inlet section and closes the air inlet section, the large diameter section of the left valve body is located at the large diameter section of the inner cavity of the air inlet section, and the inner cavity of the air inlet section is connected with the inner cavity of the left valve body through the exhaust groove.

7. The launch impact simulation experimental system according to claim 6, Features: A closed connecting disk is provided at the left end surface of the pressure relief section. The damping member also includes a damping tube, which is connected to the connecting disk and extends to the left into the necked section. The buffer piston is sleeved on the damping tube and axially slides with the damping tube. The inner cavity of the damping tube is connected to the inner cavity of the pressure relief section.

8. The launch impact simulation experimental system according to claim 7, Features: The damper is a hollow structure, and a avoidance hole for the left end of the damping tube to pass through is opened at the right end of the damper.

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