Ejection type separation bolt testing device

Abstract

The invention discloses an ejection type separation bolt testing device which is characterized in that a bearing base is fixedly mounted at a testing place, a testing table is mounted at the top of the bearing base, a product mounting module is mounted on the testing table, and a separation bolt is mounted on the product mounting module through a separation bolt fixing cylinder; the tail end of the separation bolt fixing cylinder is provided with a through hole connected with an outlet wire of a firer joint, impact acting force generated at the moment when the separation bolt is detonated is collected through the load sensor, a load and a guide rod of the guide rail module serve as a mandrel of the hydrostatic bearing, relative movement is achieved, and a groove-shaped hydrostatic oil cavity is formed in the hydrostatic bearing. The device is used for generating static pressure to support a load, compared with a traditional linear guide rail, the running speed is higher, the running precision in the testing process is high, long-time testing is stable and reliable, a buffering braking unit developed through the hydrostatic pressure technology is adopted to replace a traditional elastic element, buffering damping is continuously adjustable, collision impact vibration is reduced, and testing springback is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of experimental testing equipment, and in particular to an ejection type separation bolt testing device. Background Art

[0002] The ejection-type separation bolt is a key component for explosive separation of weapons and equipment. It must not only meet the requirements of high load-bearing capacity, but also be able to push a certain mass load to separate at a higher speed. In order to meet the higher technical requirements of today's weapons and equipment, reliable extreme performance testing is extremely important.

[0003] The traditional separation speed test bench uses a linear guide to carry the load. Due to mechanical friction interference, the limit separation speed is difficult to exceed 10m / s, and the test results deviate from the actual working conditions. The buffer brake uses elastic elements, and the mechanical damping brings about a large collision impact and reverse rebound, which seriously affects the service life of the test bench. Summary of the invention

[0004] The purpose of the present invention is to provide an ejection type separation bolt testing device, which has high testing speed, low friction resistance, small impact vibration, and stable and reliable long-term testing process.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides an ejection-type separation bolt testing device, including a bearing base, a test table, a product installation module, a load and guide rail module, a buffer brake module and a speed testing module. The bearing base is installed and fixed at the test site, the test table is installed on the top of the bearing base, and the product installation module is installed on the test table. The product installation module includes a separation bolt fixing tube and a load sensor. The separation bolt fixing tube is used to install the separation bolt. A through hole is provided at the tail end of the separation bolt fixing tube. The separation bolt is connected to the pyrotechnic joint outlet through the through hole. The load sensor is used to collect the impact generated by the separation bolt at the moment of detonation. The load and guide rail module includes a guide rod, a hydrostatic bearing and a load. The guide rod serves as the core shaft of the hydrostatic bearing to achieve relative movement. A hydrostatic oil chamber in the shape of a groove is provided in the hydrostatic bearing to generate static pressure to support the load. The second end of the separation bolt is connected to the guide rod, and the guide rod is located in the explosion direction of the separation bolt. The impact force generated by the detonation of the separation bolt pushes the guide rod with the load installed to move until it collides with the buffer brake module. After the piston rod of the buffer brake module is collided, it generates a certain speed and stops after buffering. The speed test module is used to detect the speed of the guide rod and calculate the output separation speed index.

[0006] Among them, it also includes a reaction force support arranged in the product installation module, which is used to bear the horizontal thrust at the moment of explosion of the separation bolt. The load sensor is installed between the reaction force support and the separation bolt fixing tube. The load sensor is connected to the reaction force support through an external flange indexing screw. The reaction force support is a reaction force support welded with steel plates and reinforced with double ribs. The reaction force support is bolted to the test table.

[0007] Wherein, the load and guide rail module includes a plurality of the hydrostatic bearings, each of the hydrostatic bearings is provided with an even number of pairs of hydrostatic oil chambers, and each of the hydrostatic oil chambers is equipped with a hydraulic damping throttle.

[0008] Among them, it also includes an oil supply system connected to the hydrostatic bearing, and the oil supply system is used to input hydraulic oil into the gap between the hydrostatic bearing and the guide rod through a throttle. The oil supply system includes an oil pump motor unit, an oil tank, an oil source cooling unit, a control valve group, hydraulic accessories and an electric control cabinet.

[0009] Among them, the load is a combined load, which includes a load connecting plate and a counterweight block. The guide rod is a titanium alloy guide rod, and the load connecting plate is a titanium alloy load connecting plate. The number of guide rods is two, and the two guide rods are arranged in parallel and connected to the load connecting plate at the same time. The counterweight block is a steel plate counterweight block, and the counterweight block is connected to the load connecting plate by screws.

[0010] Wherein, it also includes a threaded fixing hole and a flange connection hole arranged on the separation bolt fixing cylinder, and the separation bolt fixing cylinder is threadedly connected with the separation bolt through the threaded fixing hole.

[0011] Among them, the speed test module includes a displacement sensor, a detection magnetic ring and a detection magnetic rod. The detection magnetic ring is sleeved on the detection magnetic rod. The displacement sensor is used for the differential value of the detection magnetic ring and the detection magnetic rod. The separation speed index is calculated through the displacement time parameter.

[0012] Among them, the buffer brake module also includes a double-row hydrostatic bearing and a throttling effect regulating valve. The buffer brake module suspends the piston rod in the cylinder body through the liquid hydrostatic bearing. The buffer brake module includes a first oil chamber and a second oil chamber. The throttling effect regulating valve for adjusting the buffer is arranged between the first oil chamber and the second oil chamber, which is used to steplessly adjust the buffer damping.

[0013] Among them, the supporting base includes a top surface structure, a side structure and a bottom structure, the top surface structure includes a top surface steel plate and a top surface angle steel, a plurality of the top surface angle steels are welded to form a rectangular frame, a plurality of the top surface steel plates are arranged in parallel and a pair of opposite sides of the top surface steel plates are welded to the rectangular frame, the side structure is welded to the rectangular frame through the tops of a plurality of side surface angle steels, the bottom structure is the same shape and size as the top surface structure, and the bottoms of a plurality of the side surface angle steels are welded to the bottom surface frame.

[0014] The test table is an integrated test table, which is connected to the bearing base by bolts or screws, a square hole for installing the load sensor is arranged on the front of the test table, and a threaded hole for lifting is arranged on the side of the test table.

[0015] The ejection-type separation bolt testing device provided in the embodiment of the present invention has the following advantages compared with the prior art:

[0016] The ejection-type separation bolt testing device provided by the embodiment of the present invention is characterized in that the bearing base is installed and fixed at the test site, the test table is installed on the top of the bearing base, the product installation module is installed on the test table, the product installation module installs the separation bolt through the separation bolt fixing tube, the tail end of the separation bolt fixing tube is provided with a through hole for connecting the outlet line of the pyrotechnic joint, the impact force generated at the moment of detonation of the separation bolt is collected by a load sensor, the guide rod of the load and the guide rail module is used as the core shaft of the hydrostatic bearing to achieve relative movement, a groove-shaped hydrostatic oil chamber is provided in the hydrostatic bearing to generate static pressure to support the load, compared with the traditional linear guide rail, the running speed is higher, the running accuracy of the test process is high, and the long-term test is stable and reliable, and the buffer brake unit developed by liquid hydrostatic technology replaces the traditional elastic element to achieve continuous adjustment of the buffer damping, reduce collision impact vibration, and reduce test rebound. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of an embodiment of the ejection type separation bolt testing device provided by the present invention;

[0019] Figure 2 A schematic diagram of the three-dimensional structure of a bearing base of an embodiment of the ejection-type separation bolt testing device provided by the present invention;

[0020] Figure 3 A schematic diagram of the three-dimensional structure of a test table of an embodiment of the ejection-type separation bolt test device provided by the present invention;

[0021] Figure 4 A schematic diagram of the three-dimensional structure of a product installation module of an embodiment of the ejection-type separation bolt testing device provided by the present invention;

[0022] Figure 5 A schematic diagram of the three-dimensional structure of a buffer brake module of a three-dimensional structure diagram of a load and guide rail module of an embodiment of a ejection-type separation bolt testing device provided by the present invention;

[0023] Figure 6 A schematic diagram of the three-dimensional structure of a buffer brake module of an embodiment of the ejection-type separation bolt testing device provided by the present invention;

[0024] Figure 7 A schematic diagram of the three-dimensional structure of a speed test module of an embodiment of the ejection-type separation bolt test device provided by the present invention;

[0025] Figure 8 A schematic diagram of the three-dimensional structure of a hydraulic oil source of an embodiment of an ejection-type separation bolt testing device provided by the present invention;

[0026] Among them, the bearing base-1, the test table-2, the product installation module-3, the load and guide rail module-4, the buffer brake module-5, the speed test module-6, the hydraulic oil source-7, the square steel-11, the steel plate-12, the separation bolt fixing cylinder-31, the load sensor-32, the reaction force support-33, the guide rod-41, the hydrostatic bearing-42, the combined load-43, the piston rod-51, the double-row hydrostatic bearing-52, the throttling effect regulating valve-53, the detection magnetic ring-61, the detection magnetic rod-62, the oil pump motor unit-71, the oil tank-72, the oil source cooling system-73, the control valve group-74, the hydraulic accessories-75, and the electric control cabinet-76. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0028] Please refer to Figure 1-Figure 8 , Figure 1 It is a schematic diagram of the overall three-dimensional structure of an embodiment of the ejection type separation bolt testing device provided by the present invention; Figure 2A schematic diagram of the three-dimensional structure of a bearing base of an embodiment of the ejection-type separation bolt testing device provided by the present invention; Figure 3 A schematic diagram of the three-dimensional structure of a test table of an embodiment of the ejection-type separation bolt test device provided by the present invention; Figure 4 A schematic diagram of the three-dimensional structure of a product installation module of an embodiment of the ejection-type separation bolt testing device provided by the present invention; Figure 5 A schematic diagram of the three-dimensional structure of a buffer brake module of a three-dimensional structure diagram of a load and guide rail module of an embodiment of a ejection-type separation bolt testing device provided by the present invention; Figure 6 A schematic diagram of the three-dimensional structure of a buffer brake module of an embodiment of the ejection-type separation bolt testing device provided by the present invention; Figure 7 A schematic diagram of the three-dimensional structure of a speed test module of an embodiment of the ejection-type separation bolt test device provided by the present invention; Figure 8 A schematic diagram of the three-dimensional structure of a hydraulic oil source of an embodiment of the ejection-type separation bolt testing device provided by the present invention.

[0029] In a specific embodiment, the ejection type separation bolt test device includes a bearing base 1, a test table 2, a product installation module 3, a load and guide rail module 4, a buffer brake module 5 and a speed test module 6. The bearing base 1 is installed and fixed at the test site, the test table 2 is installed on the top of the bearing base 1, and the product installation module 3 is installed on the test table 2. The product installation module 3 includes a separation bolt fixing tube 31 and a load sensor 32. The separation bolt fixing tube 31 is used to install the separation bolt. The tail end of the separation bolt fixing tube 31 is provided with a through hole. The separation bolt is connected to the pyrotechnic joint outlet through the through hole. The load sensor 32 is used to collect the impact force generated by the separation bolt at the moment of detonation. The load and guide rail module 4 includes a guide rod 41, a hydrostatic bearing 42 and a load. The guide rod 41 serves as the core shaft of the hydrostatic bearing 42 to achieve relative movement. The hydrostatic bearing 42 is provided with a groove-shaped hydrostatic oil chamber for generating static pressure to support the load. The second end of the separation bolt is connected to the guide rod 41. The guide rod 41 is located in the explosion direction of the separation bolt. The impact force generated by the detonation of the separation bolt pushes the guide rod 41 equipped with the load to move until it collides with the buffer brake module 5. After the piston rod 51 of the buffer brake module 5 is collided, it generates a certain speed and stops after buffering. The speed test module 6 is used to detect the speed of the guide rod 41 and calculate the output separation speed index.

[0030] The bearing base 1 is installed and fixed at the test site, the test table 2 is installed on the top of the bearing base 1, and the product installation module 3 is installed on the test table 2. The product installation module 3 installs the separation bolt through the separation bolt fixing tube 31. The tail end of the separation bolt fixing tube 31 is provided with a through hole for connecting the pyrotechnic joint outlet line. The impact force generated at the moment of detonation of the separation bolt is collected by the load sensor 32. The guide rod 41 of the load and guide rail module 4, as the core shaft of the hydrostatic bearing 42, realizes relative movement. The hydrostatic bearing 42 is provided with a groove-shaped hydrostatic oil chamber for generating static pressure to support the load. Compared with the traditional linear guide rail, the running speed is higher, the running accuracy of the test process is high, and the long-term test is stable and reliable. The buffer brake unit developed by liquid hydrostatic technology replaces the traditional elastic element to realize continuous adjustable buffer damping, reduce collision impact vibration, and reduce test rebound.

[0031] In order to further improve the stability of the test and avoid reducing the test accuracy due to the horizontal thrust at the moment of explosion of the separation bolt, in one embodiment, the ejection type separation bolt testing device also includes a reaction force support 33 arranged on the product installation module 3, which is used to bear the horizontal thrust at the moment of explosion of the separation bolt. The load sensor 32 is installed between the reaction force support 33 and the separation bolt fixing tube 31. The load sensor 32 is connected to the reaction force support 33 through an external flange indexing screw. The reaction force support 33 is a reaction force support 33 welded with steel plates and reinforced with double ribs. The reaction force support 33 is bolted to the test table 2.

[0032] By arranging a reaction force support 33 in the product installation module 3 to bear the horizontal thrust at the moment of the separation bolt explosion, it can be ensured that the thrust of the separation bolt explosion ultimately acts only in the specified direction, thereby improving the accuracy of the test, ensuring the reliability of the test, and reducing the randomness caused by the uncertainty of the horizontal thrust during the explosion process in the test. At the same time, it can also protect the safety of equipment and personnel in this direction.

[0033] The present application does not limit the shape, structure, material and installation method of the reaction support 33, including but not limited to the use of steel plates for welding, and does not limit the setting of the double rib plate.

[0034] The load sensor 32 in the present application is installed between the reaction support 33 and the separation bolt fixing tube 31, and is used to collect the impact force generated at the moment of separation bolt detonation, and then display the force value and time curve through computer collection. The present application does not limit its installation method and accuracy level, and the general accuracy is greater than or equal to level 0.5.

[0035] In the present application, a hydrostatic bearing 42 structure is adopted and the high shock resistance of the hydrostatic oil film is utilized to almost eliminate the huge impact caused by the traditional mechanical buffer device, reduce friction, and improve the accuracy of the test. In the present application, there is no limitation on the number of hydrostatic bearings 42 and hydrostatic oil chambers. In order to ensure that the guide rod 41 is always in the center, the load and guide rail module 4 generally includes a plurality of the hydrostatic bearings 42, each of which is provided with an even number of pairs of hydrostatic oil chambers, and each of the hydrostatic oil chambers is equipped with a hydraulic damping throttle.

[0036] In order to further adjust the oil film stiffness of the hydrostatic bearing 42 and change its static pressure on the guide rod 41, in one embodiment, the ejection type separation bolt testing device also includes an oil supply system connected to the hydrostatic bearing 42, and the oil supply system is used to input hydraulic oil into the gap between the hydrostatic bearing 42 and the guide rod 41 through a throttle. The oil supply system includes an oil pump motor unit 71, an oil tank 72, an oil source cooling unit, a control valve group 74, a hydraulic accessory 75 and an electric control cabinet 76.

[0037] By setting up an oil supply system to input hydraulic oil into the gap between the static pressure bearing 42 and the guide rod 41 through a throttle, hydraulic oils of different pressures provide different static pressures, so that accurate measurement of the explosion of different types of separation bolts can be achieved.

[0038] In order to further realize the measurement of more types of separation bolts, in one embodiment, the load is a combined load 43, and the combined load includes a load connecting plate and a counterweight block. The guide rod 41 is a titanium alloy guide rod, and the load connecting plate is a titanium alloy load connecting plate. The number of the guide rods 41 is two, and the two guide rods 41 are arranged in parallel and are connected to the load connecting plate at the same time. The counterweight block is a steel plate counterweight block, and the counterweight block is connected to the load connecting plate by screws.

[0039] By adopting the combined load 43, different weight blocks are used in the process of testing different separation bolts to test the limit flight speed under different counterweights.

[0040] In this application, a titanium alloy guide rod 41 and a titanium alloy load connecting plate are used. The combined load 43 includes a guide rod 41 and a load connecting plate, both of which are made of titanium alloy. The counterweight block is a processed steel plate 12. Through the combination of counterweight blocks, it can meet the use requirements of various load masses, and the mass accuracy of the counterweight block is ±0.01kg.

[0041] In the present application, the separation bolt will be installed in the separation bolt fixing tube 31, and its fixing method is not limited. In one embodiment, the ejection type separation bolt testing device also includes a threaded fixing hole and a flange connection hole arranged in the separation bolt fixing tube 31, and the separation bolt fixing tube 31 is threadedly connected to the separation bolt through the threaded fixing hole.

[0042] By means of threaded connection or flange connection through the flange connection hole, flexible fixation of the separation bolts can be achieved, thereby improving the test efficiency.

[0043] The present application does not limit the connection method between the separation bolt fixing cylinder 31 and the separation bolt.

[0044] In the present application, a speed test module 6 is used to test the speed of the piston rod 51. There is no limitation on the test structure thereof. Mechanical structure detection, photoelectric structure detection, or other detection methods may be used.

[0045] In one embodiment, the speed testing module 6 includes a displacement sensor, a detection magnetic ring 61 and a detection magnetic rod 62. The detection magnetic ring 61 is sleeved on the detection magnetic rod 62. The displacement sensor is used for the differential value between the detection magnetic ring 61 and the detection magnetic rod 62. The separation speed index is calculated through the displacement time parameter.

[0046] By adopting the structure of the detection magnetic ring 61 and the detection magnetic rod 62 to perform differential detection, the detection accuracy is high and the structure is simple.

[0047] The buffer brake module 5 is used in the present application, and the buffer brake module 5 also includes a double-row hydrostatic bearing 52 and a throttling effect regulating valve 53. The buffer brake module 5 suspends the piston rod 51 in the cylinder body through the liquid hydrostatic bearing 42. The buffer brake module 5 includes a first oil chamber and a second oil chamber. The throttling effect regulating valve 53 for adjusting the buffer is arranged between the first oil chamber and the second oil chamber, which is used to steplessly adjust the buffer damping to ensure no secondary rebound.

[0048] A throttling effect regulating valve 53 for adjusting the buffer is provided between the first oil chamber and the second oil chamber to steplessly adjust the buffer damping, thereby ensuring that there is no secondary rebound and avoiding data distortion and damage to the equipment caused by rebound.

[0049] The present application includes but is not limited to the above-mentioned buffer brake module 5 .

[0050] In the present application, a test platform and other components are carried by a bearing base 1 and installed in a test site, and its structure is not limited. In one embodiment, the bearing base 1 includes a top surface structure, a side structure and a bottom structure. The top surface structure includes a top surface steel plate 12 and a top surface angle steel. A plurality of the top surface angle steels are welded to form a rectangular frame. A plurality of the top surface steel plates 12 are arranged in parallel and a pair of opposite sides of the top surface steel plates 12 are welded to the rectangular frame. The side structure is welded to the rectangular frame through the tops of a plurality of side surface angle steels. The bottom structure is the same shape and size as the top surface structure, and the bottoms of a plurality of the side surface angle steels are welded to the bottom surface frame.

[0051] The bearing base 1 is welded by square steel 11 and steel plate 12. Through special structural design, the bearing strength and bearing stiffness are guaranteed to meet the test indicators and the weight is as light as possible. The upper plane steel plate of the bearing base 1 is provided with screw holes for connecting with the test table 2, and the lower plane steel plate of the bearing base 1 is provided with screw holes for connecting the anchor bolts with the laboratory floor.

[0052] In the present application, a test table 2 is used to install related components, and its structure is not limited. In one embodiment, the test table 2 is an integrated test table, and the test table 2 is bolted or screwed to the bearing base 1. The front of the test table 2 is provided with a square hole for installing the load sensor 32, and the side of the test table 2 is provided with a threaded hole for lifting.

[0053] In one embodiment, the test table 2 is cut from a whole steel plate to meet the overall strength requirements. The upper surface of the test table 2 is provided with screw holes for connecting with the product installation module 3, the load and guide rail module 4, the buffer brake module 5, and the speed test module 6. The lower surface of the test table 2 is provided with screw holes for connecting with the bearing base 1. The test table 2 is designed with special square holes to facilitate the installation of the load sensor 32. The side of the test table 2 is designed with lifting threaded holes to facilitate the installation of components and overall lifting.

[0054] In one embodiment, the ejection-type separation bolt testing device includes a bearing base 1, a test table 2, a product installation module 3, a load and guide rail module 4, a buffer brake module 5, a speed test module 6 and a hydraulic oil source 7.

[0055] The various components of the ejection-type separation bolt test device are connected by welding and screws. The overall size of the test device is 2.5m×0.8m×1.5m, and the height of the operating table is 750mm; the load module can meet the use requirements of 6kg-50kg load mass; the load mass accuracy is ±0.01kg; the guide rail module adopts a liquid hydrostatic support structure, the starting friction force is less than 0.5N, the ability to resist lateral force is 5kN, and the effective stroke is 200mm; the buffer brake module 5 adopts a liquid hydrostatic support structure, the starting friction force is less than 0.5N, and the throttling damping is steplessly adjustable; the hydraulic oil source 7 system working pressure is 21Mpa, and the rated flow rate is 10L / min.

[0056] The bearing base 1 is welded by square steel 11 and steel plate 12, and is as lightweight as possible while ensuring that the bearing strength and bearing stiffness meet the test indicators. The upper plane steel plate 12 of the bearing base 1 is provided with screw holes for connecting with the test table 2, and the lower plane steel plate 12 of the bearing base 1 is provided with screw holes for connecting the anchor bolts with the laboratory floor.

[0057] The test table 2 is cut from a whole piece of steel plate to meet the overall strength requirements. The upper surface of the test table 2 is configured with screw holes for connecting with the product installation module 3, the load and guide rail module 4, the buffer brake module 5, and the speed test module 6. The lower surface of the test table 2 is configured with screw holes for connecting with the bearing base 1. The test table 2 is designed with special square holes to facilitate the installation of the load sensor 32. The side of the test table 2 is designed with threaded holes for lifting.

[0058] The product installation module 3 is composed of a separation bolt fixing cylinder 31, a load sensor 32, a reaction force support 33, etc. The separation bolt fixing cylinder 31 is connected to the inner hole of the load sensor 32 through a thread, and its function is to install the separation bolt. The tail end of the fixing cylinder is a through hole for the separation bolt to connect the pyrotechnic joint outlet. The regional physical isolation is adopted to ensure that when the pyrotechnic joint detonates the separation bolt, the explosion residues generated by the pyrotechnic joint do not affect other areas of the test device.

[0059] The product installation module 3 can meet the installation requirements of different types of separation bolts, including threaded connection, flange connection and other forms; the load sensor 32 is connected to the reaction support 33 through the external flange indexing screw, which is used to collect the impact force generated by the separation bolt detonation, and then display the force value and time curve through computer collection. The accuracy level of the load sensor 32 is 0.1; the reaction support 33 is welded with steel plates, adopts a triangular stable structure, and strengthens the bearing capacity through double ribs. It is used to bear the horizontal thrust at the moment of the separation bolt explosion. The reaction support 33 is equipped with screw holes and connected to the test table 2.

[0060] The load and guide rail module 4 is composed of a guide rod 41, a hydrostatic bearing 42 and a combined load 43. The working principle of the hydrostatic bearing 42 is to send hydraulic oil with a certain pressure through the throttle into the gap between the hydrostatic bearing 42 and the guide rod 41 through the oil supply system. A hydrostatic cavity in the shape of a groove is provided in the hydrostatic bearing 42 to generate static pressure to support the load. When the hydraulic oil enters the hydrostatic cavity, since the hydrostatic cavity is symmetrically distributed, the guide rod 41 is ensured to be at the center of the hydrostatic bearing 42. At this time, the gap between the hydrostatic bearing 42 and the guide rod 41 is the initial gap, and the pressure in each hydrostatic cavity is equal. When the guide rod 41 is subjected to radial load, the gap on the loaded side becomes larger, the oil outflow increases, and the pressure in the hydrostatic cavity decreases. The gap on the other side becomes smaller, the oil outflow decreases, and the pressure in the hydrostatic cavity increases. The pressure difference in the hydrostatic cavities on both sides re-suspends the guide rod 41 at the center of the hydrostatic bearing 42. The single hydrostatic bearing 42 design evenly distributes four hydrostatic oil chambers and is equipped with the same damping throttle. The guide module adopts two sets of dual hydrostatic bearing 42 structures to improve the ability to resist lateral forces and ensure accurate and reliable guidance under high load impact. The hydrostatic guide module adopts full liquid lubrication, almost no friction resistance, bringing ultra-high speed and ultra-long life.

[0061] The combined load 43 includes a guide rod 41 and a load connecting plate. In order to achieve the minimum additional mass, both are made of titanium alloy. The counterweight block is a processed steel plate 12. Through the combination of counterweight blocks, the use requirements of various load masses can be met. The counterweight block is connected to the load connecting plate by screws. The counterweight adjustment is simple and convenient, and the mass accuracy of the counterweight block is ±0.01kg.

[0062] The buffer brake module 5 is used to achieve effective buffering and collection of high-speed loads, and has an anti-rebound device. The effective buffer braking times are not less than 1000 times. The buffer brake module 5 adopts a hydrostatic bearing structure, including a piston rod 51, a double-row hydrostatic bearing 52, a throttling effect regulating valve 53, etc. Through the balancing principle of the liquid hydrostatic bearing 42, the piston rod 51 is suspended in the cylinder body, and an AB oil chamber is provided inside. A throttling effect regulating valve 53 is installed between the AB oil chambers for stepless adjustment of the buffer damping effect, which is adjusted to just buffer and brake the high-speed mass block to zero speed and ensure no secondary rebound.

[0063] The speed test module 6 includes a detection magnetic ring 61 and a detection magnetic rod 62. Its function is to collect and process the data of the displacement sensor and finally display the speed time curve on the display. The displacement data comes from the differential value of the detection magnetic ring 61 and the detection magnetic rod 62. The separation speed index is calculated through the displacement time parameter.

[0064] The hydraulic oil source 7 is mainly composed of an oil pump motor group 71, an oil tank 72, an oil source cooling system 73, a control valve group 74, hydraulic accessories 75 and an electric control cabinet 76. As the provider of test power, the performance and service life are directly related to the operation of the system, and can ensure stability and reliability under continuous testing. The hydraulic oil inside the oil tank 72 enters the control valve group 74 through the oil pump motor group 71 to obtain high pressure. Through the hydraulic accessories 75 of each part, it enters the hydrostatic bearing 42 of the load and guide module 4, and at the same time enters the double-row hydrostatic bearing 5242 of the buffer brake module 5. The oil leakage from the gap of the hydrostatic bearing 42 is collected back to the oil tank 72 for recycling. The action signal of the control valve group 74 is provided by the electric control cabinet 76, and the hydraulic oil is cooled and circulated through the oil source cooling system 73 after the working temperature rises.

[0065] In this embodiment, a complete ejection-type separation bolt test process is as follows:

[0066] One end of the ejection type separation bolt is installed on the product installation module 3, and the other end is installed on the load and guide rail module 4. The hydraulic oil source 7 provides sufficient hydraulic power to the load and guide rail module 4 and the buffer brake module 5. When the separation bolt explodes, the explosive thrust drives the load and guide rail module 4 to move at a high speed, and the real limit separation speed under the explosion equivalent is obtained. The speed index is collected and calculated by the speed test module 6, and the explosive thrust is collected by the load sensor 32. After measuring the corresponding index, the load and guide rail module 4 collides with the buffer brake module 5. By adjusting the appropriate buffer brake damping, the load and guide rail module 4 is smoothly decelerated to zero, and no reverse rebound is ensured.

[0067] The above-mentioned ejection type separation bolt testing device is mainly used for performance testing of elastic type separation bolts under conditions close to actual working conditions, including quantitative testing of key performance parameters such as separation speed, separation impact force and action time of the ejection type separation bolts, and can meet the performance testing of ejection type separation bolts with different guide strokes, different load masses and different installation interfaces.

[0068] The precision guide mechanism developed with liquid hydrostatic technology replaces the traditional linear guide rail, and the operating speed can be increased to 20m / s at most. The test process has high operating accuracy and long-term testing is stable and reliable.

[0069] The buffer brake unit developed with liquid static pressure technology replaces the traditional elastic element to achieve continuous adjustable buffer damping, reduce collision impact vibration, and ensure zero rebound in the reverse direction during the test process.

[0070] To summarize, the ejection-type separation bolt testing device provided by the embodiment of the present invention is achieved by installing and fixing the bearing base at the test site, installing the test table on the top of the bearing base, and installing the product installation module on the test table. The product installation module installs the separation bolt through a separation bolt fixing tube, and a through hole for connecting the outlet line of the pyrotechnic joint is provided at the tail end of the separation bolt fixing tube. The impact force generated at the moment of detonation of the separation bolt is collected by a load sensor. The guide rod of the load and guide rail module serves as the core axis of the hydrostatic bearing to achieve relative movement. A groove-shaped hydrostatic oil chamber is provided in the hydrostatic bearing to generate static pressure to support the load. Compared with traditional linear guides, the running speed is higher, the running accuracy during the test process is high, and the long-term test is stable and reliable. The buffer brake unit developed by liquid hydrostatic technology replaces the traditional elastic element to achieve continuous adjustment of the buffer damping, reduce collision impact vibration, and reduce test rebound.

[0071] The ejection-type separation bolt testing device provided by the present invention is introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A ejection type separation bolt testing device, characterized in that: The invention comprises a bearing base, a test table, a product installation module, a load and guide rail module, a buffer brake module and a speed test module. The bearing base is installed and fixed at the test site, the test table is installed on the top of the bearing base, the product installation module is installed on the test table, the product installation module comprises a separation bolt fixing cylinder and a load sensor, the separation bolt fixing cylinder is used to install the separation bolt, the tail end of the separation bolt fixing cylinder is provided with a through hole, the separation bolt is connected to the pyrotechnic joint outlet through the through hole, the load sensor is used to collect the impact force generated by the separation bolt at the moment of detonation, the load and guide rail module comprises a guide The guide rod is used as the core shaft of the hydrostatic bearing to realize relative movement. A hydrostatic oil chamber in the shape of a groove is provided in the hydrostatic bearing to generate static pressure to support the load. The second end of the separation bolt is connected to the guide rod, and the guide rod is located in the explosion direction of the separation bolt. The impact force generated by the detonation of the separation bolt pushes the guide rod with the load installed to move until it collides with the buffer brake module. After the piston rod of the buffer brake module is collided, it generates a certain speed and stops after buffering. The speed test module is used to detect the speed of the guide rod and calculate the output separation speed index.

2. The ejection type separation bolt testing device according to claim 1, characterized in that: It also includes a reaction force support arranged in the product installation module, which is used to bear the horizontal thrust at the moment of explosion of the separation bolt. The load sensor is installed between the reaction force support and the separation bolt fixing tube. The load sensor is connected to the reaction force support through an external flange indexing screw. The reaction force support is a reaction force support welded with steel plates and reinforced with double ribs. The reaction force support is bolted to the test table.

3. The ejection type separation bolt testing device according to claim 1, characterized in that: The load and guide rail module includes a plurality of the hydrostatic bearings, each of which is provided with an even number of pairs of hydrostatic oil chambers, and each of the hydrostatic oil chambers is equipped with a hydraulic damping throttle.

4. The ejection type separation bolt testing device as claimed in claim 3, characterized in that: It also includes an oil supply system connected to the hydrostatic bearing, the oil supply system is used to input hydraulic oil into the gap between the hydrostatic bearing and the guide rod through a throttle, and the oil supply system includes an oil pump motor unit, an oil tank, an oil source cooling unit, a control valve group, hydraulic accessories and an electric control cabinet.

5. The ejection-type separation bolt testing device according to claim 1, characterized in that: The load is a combined load, which includes a load connecting plate and a counterweight block. The guide rod is a titanium alloy guide rod, and the load connecting plate is a titanium alloy load connecting plate. There are two guide rods, which are arranged in parallel and connected to the load connecting plate at the same time. The counterweight block is a steel plate counterweight block, and the counterweight block is connected to the load connecting plate by screws.

6. The ejection-type separation bolt testing device according to claim 1, characterized in that: It also includes a threaded fixing hole and a flange connection hole arranged on the separation bolt fixing cylinder, and the separation bolt fixing cylinder is threadedly connected with the separation bolt through the threaded fixing hole.

7. The ejection-type separation bolt testing device according to claim 1, characterized in that: The speed test module includes a displacement sensor, a detection magnetic ring and a detection magnetic rod. The detection magnetic ring is sleeved on the detection magnetic rod. The displacement sensor is used for the differential value of the detection magnetic ring and the detection magnetic rod. The separation speed index is calculated through the displacement time parameter.

8. The ejection-type separation bolt testing device according to claim 1, characterized in that: The buffer brake module also includes a double-row hydrostatic bearing and a throttling effect regulating valve. The buffer brake module suspends the piston rod in the cylinder body through the liquid hydrostatic bearing. The buffer brake module includes a first oil chamber and a second oil chamber. The throttling effect regulating valve for adjusting the buffer is arranged between the first oil chamber and the second oil chamber, which is used to steplessly adjust the buffer damping.

9. The ejection type separation bolt testing device according to claim 1, characterized in that: The bearing base includes a top surface structure, a side structure and a bottom structure. The top surface structure includes a top surface steel plate and a top surface angle steel. Multiple top surface angle steels are welded to form a rectangular frame. Multiple top surface steel plates are arranged in parallel and a pair of opposite sides of the top surface steel plates are welded to the rectangular frame. The side structure is welded to the rectangular frame through the tops of multiple side surface angle steels. The bottom structure is the same shape and size as the top surface structure, and the bottoms of multiple side surface angle steels are welded to the bottom frame.

10. The ejection type separation bolt testing device according to claim 1, characterized in that: The test table is an integrated test table, which is connected to the bearing base by bolts or screws. The front of the test table is provided with square holes for installing the load sensor, and the side of the test table is provided with threaded holes for lifting.

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