A special static test equipment for reliability verification of fuze safety mechanism

Abstract

The application provides a special static test equipment for fuze safety mechanism reliability verification. The special static test equipment for fuze safety mechanism reliability verification comprises a support frame and a table plate arranged on the support frame, a centrifugal mechanism, a clamping mechanism, a balancing mechanism and a braking mechanism are installed on the table plate, the centrifugal mechanism comprises a key, a connecting sleeve, a current collecting ring, a main shaft and a bushing, the key connects the main shaft and a rotating disc of the balancing mechanism, the connecting sleeve is connected with the main shaft and the key, the insulating enameled wire of the current collecting ring is connected with a fuze signal line through the through hole of the connecting sleeve, the bushing is in clearance fit with a brake disc of the braking mechanism, and the bushing is arranged on the main shaft and placed in the middle hole of the table plate. The special static test equipment for fuze safety mechanism reliability verification has simple structure, low cost and good universality, and can be used for reliability verification of safety mechanisms of various electromechanical trigger fuzes.

Description

Technical Field

[0001] This invention relates to the field of fuze quality and safety inspection technology, and in particular to a static test device for verifying the reliability of fuze insurance institutions. Background Technology

[0002] Dynamic testing generally refers to destructive tests that measure the change in load rate or deformation rate over time, such as fatigue tests, impact tests, and dynamic simulation tests of products. It can also refer to non-destructive tests that use cyclic stress or deformation to study material properties. The centrifuge principle is mainly used in tests involving the separation of suspended matter in liquids. Both testing methods have wide applications. After a fuze is assembled and deemed qualified, the reliability (sensitivity) of its safety mechanism must be verified. Currently, dynamic testing of fuzes generally refers to the impact test of a certain projectile after assembly. This type of test is extremely dangerous, costly, and has a severe environmental impact; therefore, it is necessary to invent corresponding static flight simulation testing equipment. Summary of the Invention

[0003] Based on this, the present invention provides a dedicated static test device for verifying the reliability of a fuse safety mechanism that simulates the high-speed flight dynamics of a projectile after the fuse is loaded, and has high reliability and conforms to physics. The device has a simple structure, low cost, good versatility, and can be used for reliability verification of various electromechanical trigger fuse safety mechanisms.

[0004] This invention discloses a dedicated static testing device for verifying the reliability of a fuze safety mechanism, comprising a support frame and a platform mounted on the support frame. The platform is equipped with a centrifugal mechanism, a clamping mechanism, a balancing mechanism, and a braking mechanism. The centrifugal mechanism includes a key, a connecting sleeve, a slip ring, a main shaft, and a pad. The key connects the main shaft to the turntable of the balancing mechanism. The connecting sleeve connects the main shaft and the key. The insulated enameled wire of the slip ring passes through a through-hole in the connecting sleeve and connects to the fuze signal line. The pad is clearance-fitted with the brake disc of the braking mechanism. The pad passes through the main shaft and is positioned within a central hole in the platform. The clamping mechanism includes a low-voltage electromagnet and a fuze clamp. The system includes a positioning rod, a clamping plate, and a positioning block. The positioning block is connected to the turntable. The positioning rod and the clamping plate are both connected to the positioning block. The fuze clamp is connected to the positioning rod. The low-voltage electromagnet is connected to the fuze clamp. The balancing mechanism includes a balance block and the turntable. The balance block enters the trapezoidal slide rail of the turntable from a pre-reserved position on the turntable. The braking mechanism includes a brake disc and an electromagnetic clutch. The electromagnetic clutch is located in the central hole of the platform. The platform is connected to a speed-regulating motor. The electromagnetic clutch is connected to the platform. The bushing and the brake disc are interference-fitted. The bushing, the brake disc, and the electromagnetic clutch are assembled through the main shaft.

[0005] Furthermore, the turntable is equipped with a speed measuring signal plate, which is used to monitor the rotational speed of the turntable.

[0006] Furthermore, the static testing equipment includes a protective box covering the outside of the centrifugation mechanism, the protective box having a light-detecting hole and an observation window connected to the protective box via a cover-opening positioning plate.

[0007] Furthermore, the top of the protective box is a cover, which is connected to the side of the protective box via a common hinged hinge connector.

[0008] Furthermore, a main control electrical box mounting plate is installed on one side of the platform, and a main control electrical box is mounted on the main control electrical box mounting plate. A photosensitive speed measuring probe is mounted on the main control electrical box.

[0009] Furthermore, the fuse holder includes a base, a bracket at one end of the base, and a stop screw at the other end of the base.

[0010] Furthermore, screws are installed on both sides of the bracket for connecting the simulated detonator and the fuse clamp.

[0011] The main control electrical box controls the speed-regulating motor and electromagnetic clutch to rotate the turntable. The turntable balance block slides within the trapezoidal groove until the turntable is axially balanced. The high-speed movement of the fuze clamp carrying the fuze causes the rotor in the center to deflect, simulating the projectile's flight attitude.

[0012] Based on the relevant technical parameters for reliably disengaging the axial safety mechanism using a dynamic experimental fuze:

[0013] K ≥ 7g; (K indicates rear seat overload)

[0014] Overload calculation formula: K=a 离 =[2πN / 60]2×r, we get:

[0015]

[0016] In the above formula: a 离 —Centrifugal acceleration;

[0017] N—rotation speed (r / min);

[0018] r—the distance (m) between the center of mass of the part being tested and the center of rotation of the fuse.

[0019] When the photosensitive velocimetry probe detects a rotational speed of 322 r / min, a 离≈7g. Centrifugal acceleration replaces the back seat overload, overcoming the spring resistance and moving the axial safety pin to a reliable release zone. At this point, the low-voltage electromagnet releases the radial safety. The fuze generates a voltage signal, which is transmitted to the oscilloscope. The duration of the voltage is used to determine whether the current can trigger the fuze to fire.

[0020] The speedometer mentioned is model PR18-8AOLJ18A3-8-J / EZ.

[0021] The speed measurement method involves the speed measuring signal plate blocking the light source of the photosensitive speed measuring probe during high-speed rotation, and the frequency is measured and then converted into angular velocity.

[0022] The speed-regulating motor mentioned is a speed-regulating motor.

[0023] The fuse holder is connected to the fuse's built-in mounting screw hole by screws.

[0024] The low-voltage electromagnet is fixed to the fuze clamp with screws. The fuze clamp is interference-fitted with the positioning rod, and the positioning rod is fixed to the positioning block with screws via a clamping plate. The positioning block is fixed to the turntable with screws. The slip ring is fastened to the connecting sleeve with screws, and the connecting sleeve is fixed to the upper end of the spindle with screws. An oscilloscope voltage probe is externally connected to the upper end of the slip ring.

[0025] The electromagnetic clutch has a built-in keyway and is connected to the main shaft via a flat key.

[0026] The brake disc is mounted on the gasket.

[0027] The speed-regulating motor is fixed to the lower plate of the protective box with screws. The protective box is welded and fixed to the support frame, and the observation window is installed at the front of the protective box via a guide rail.

[0028] The balance block can move within the trapezoidal slide rail.

[0029] The static testing equipment includes, but is not limited to, two testing positions.

[0030] The beneficial effects of this invention are as follows: First, the static test equipment for verifying the reliability of fuse insurance mechanisms is highly safe. After installation, all tests are conducted within a protective enclosure. Even in the event of an accident, objects ejected at high speed can be isolated from the operators, preventing injury. After the test, the equipment can be stopped by pressing the brake button. Second, it is highly efficient. Existing equipment only has two detection positions. Based on the number of signal input interfaces on the oscilloscope, multiple test objects can be measured simultaneously by geometrically evenly distributing the fuse fixtures. Finally, the selected components are readily available and have low cost. Attached Figure Description

[0031] Figure 1This is a schematic diagram of the dedicated static test equipment for verifying the reliability of the fuse insurance mechanism according to the present invention;

[0032] Figure 2 A schematic diagram of the structure of a fuse holder according to one embodiment;

[0033] Figure 3 for Figure 1 The diagram shows the structure of the collector ring.

[0034] Figure 4 for Figure 1 A schematic diagram of the collector ring from another perspective;

[0035] Figure 5 for Figure 1 The diagram shows the structure of the turntable.

[0036] Figure 6 for Figure 1 A structural schematic diagram of the turntable from another perspective;

[0037] Figure 7 for Figure 1 The diagram shows the structure of the balance block.

[0038] Figure 8 for Figure 1 A schematic diagram of the balance block from another perspective.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1-Speed-regulating motor, 2-Support frame, 3-Photosensitive speed probe, 4-Main control electrical box mounting plate, 5-Main control electrical box, 6-Light detection hole, 7-Speed ​​signal plate, 8-Low-voltage electromagnet, 9-Fuse clamp, 10-Positioning rod, 11-Clamping plate, 12-Positioning block, 13-Flat key, 14-Connecting sleeve, 15-Slip ring, 16-Main shaft, 17-Wafer sleeve, 18-Top cover, 19-Ordinary hinge-type folding connector, 20-Opening positioning plate, 21-Protective box, 22-Observation window, 23-Table, 24-Balance block, 25-Turntable, 26-Brake disc, 27-Electromagnetic clutch, 29-Bracket, 30-Screw, 31-Base, 32-Stop screw. Detailed Implementation

[0041] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0042] Please see Figures 1-8This invention provides a dedicated static test device for verifying the reliability of a fuse safety mechanism, comprising a support frame 2 and a platform 23 mounted on the support frame. The platform is equipped with a centrifugal mechanism, a clamping mechanism, a balancing mechanism, and a braking mechanism. The centrifugal mechanism includes a key 13, a connecting sleeve 14, a slip ring 15, a main shaft 16, and a pad 17. The key 13 connects the main shaft to the turntable 25 of the balancing mechanism. The connecting sleeve connects to the main shaft and the key. The insulated enameled wire of the slip ring passes through a hole in the connecting sleeve and connects to the fuse signal line. The pad is clearance-fitted with the brake disc 26 of the braking mechanism. The pad passes through the main shaft and is placed within the central hole of the platform 23. The clamping mechanism includes a low-voltage electromagnet 8. The system includes a fuse clamp 9, a positioning rod 10, a clamping plate 11, and a positioning block 12. The positioning block is connected to the turntable. The positioning rod and the clamping plate are both connected to the positioning block. The fuse clamp is connected to the positioning rod. The low-voltage electromagnet is connected to the fuse clamp. The balancing mechanism includes a balance block 24 and the turntable. The balance block enters the trapezoidal slide rail of the turntable from a reserved position on the turntable. The braking mechanism includes a brake disc and an electromagnetic clutch 27. The electromagnetic clutch is located in the central hole of the platform. The platform is connected to the speed-regulating motor 1. The electromagnetic clutch is connected to the platform. The bushing and the brake disc are connected by an interference fit. The bushing, the brake disc, and the electromagnetic clutch are assembled through the main shaft.

[0043] In one embodiment, the turntable is provided with a speed measuring signal chip 7, which is used to monitor the rotational speed of the turntable.

[0044] In one embodiment, the static test equipment includes a protective box 21 covering the outside of the centrifugation mechanism. The protective box has a light-detecting hole 6 and an observation window 22 connected to it via a cover-opening positioning plate 20.

[0045] In one embodiment, the top of the protective box is a cover 18, which is connected to the side of the protective box via a conventional hinged hinge connector 19.

[0046] In one embodiment, a main control electrical box mounting plate 4 is installed on one side of the platform, and a main control electrical box 5 is provided on the main control electrical box mounting plate. A photosensitive speed measuring probe 3 is provided on the main control electrical box.

[0047] In one embodiment, the fuse holder includes a base 31, a bracket 29 disposed at one end of the base, and a stop screw 32 disposed at the other end of the base.

[0048] In one embodiment, screws 30 are mounted on both sides of the bracket 29 for connecting the simulated detonator and the fuse clamp.

[0049] The static test equipment for verifying the reliability of the fuze safety mechanism of this invention uses a main control electrical box to control a speed-regulating motor and an electromagnetic clutch to rotate a turntable. The turntable's balance block slides within a trapezoidal groove until the turntable is axially balanced. The high-speed movement of the fuze clamp carrying the fuze causes the rotor in the center to deflect, simulating the flight attitude of a projectile.

[0050] Based on the relevant technical parameters for reliably disengaging the axial safety mechanism using a dynamic experimental fuze:

[0051] K ≥ 7g; (K indicates rear seat overload)

[0052] Overload calculation formula: K=a 离 =[2πN / 60]2×r, we get:

[0053]

[0054] In the above formula: a 离 —Centrifugal acceleration;

[0055] N—rotation speed (r / min);

[0056] r—the distance (m) between the center of mass of the part being tested and the center of rotation of the fuse.

[0057] When the photosensitive velocimetry probe detects a rotational speed of 322 r / min, a 离 ≈7g. Centrifugal acceleration replaces the back seat overload, overcoming the spring resistance and moving the axial safety pin to a reliable release zone. At this point, the low-voltage electromagnet releases the radial safety. The fuze generates a voltage signal, which is transmitted to the oscilloscope. The duration of the voltage is used to determine whether the current can trigger the fuze to fire.

[0058] The speedometer model is PR18-8AOLJ18A3-8-J / EZ.

[0059] The speed measurement method involves the speed measuring signal plate blocking the light source of the photosensitive speed measuring probe during high-speed rotation, and the frequency is measured and then converted into angular velocity.

[0060] The speed-regulating motor mentioned is a speed-regulating motor.

[0061] The fuse holder is connected to the fuse's built-in mounting screw hole by screws.

[0062] The low-voltage electromagnet is fixed to the fuze clamp with screws. The fuze clamp is interference-fitted with the positioning rod, and the positioning rod is fixed to the positioning block with screws via a clamping plate. The positioning block is fixed to the turntable with screws. The slip ring is fastened to the connecting sleeve with screws, and the connecting sleeve is fixed to the upper end of the spindle with screws. An oscilloscope voltage probe is externally connected to the upper end of the slip ring.

[0063] The electromagnetic clutch has a built-in keyway and is connected to the main shaft via a flat key.

[0064] The brake disc is mounted on the gasket.

[0065] The speed-regulating motor is fixed to the lower plate of the protective box with screws. The protective box is welded and fixed to the support frame, and the observation window is installed at the front of the protective box via a guide rail.

[0066] The balance block can move within the trapezoidal slide rail.

[0067] The static testing equipment includes, but is not limited to, two testing positions.

[0068] Specifically, in the static test equipment for verifying the reliability of the fuse safety mechanism of the present invention, the electromagnetic clutch 27 is placed in the central hole of the platform 23 and fixed to the speed-regulating motor 1 with screws, and the lower plate of the electromagnetic clutch 27 is pressed and locked to the platform 23. The bushing 17 and the brake disc 26 are interference-fitted. The bushing 17, the brake disc 26, and the electromagnetic clutch 27 are assembled through the main shaft 16. The flat key 13 connects the turntable 25 and the main shaft 16. The connecting sleeve 14 is fixed to the main shaft 16 with screws. The insulated enameled wire of the slip ring 15 passes through the through hole of the connecting sleeve 14 to connect with the fuse signal line, and the slip ring 15 is fixed to the connecting sleeve with screws.

[0069] The main control electrical box 5, the main control electrical box mounting plate 4, the cover positioning plate 20, the protective box 21, and the platform 23 are all fixed with screws. This ensures that the photosensitive speed measuring probe 3 and the light-detecting hole 6 are in a straight line. The signal speed measuring plate 7 is fixed to the turntable 25 with screws, and at a certain moving position, it completely blocks the light-detecting hole 6.

[0070] The positioning rod 10 and clamping plate 11 are fixed to the positioning block 12 with screws. The positioning block 12 is screwed to the turntable 25. The low-voltage electromagnet 8 is fixed to the fuse clamp 9 with screws, and the power cord is connected to the slip ring 15.

[0071] Fix the fuse screw 30, which is equipped with a simulated detonator, to the fuse clamp 9, and rotate the stop screw 32 to lock the fuse.

[0072] The 15-inch insulated enameled wire of the collector ring is connected to the reserved wire of the fuse.

[0073] Connect the speed regulating motor 1, slip ring 15 power supply cable, electromagnetic clutch 27, PR18-8AOLJ18A3-8-J / EZ model speed measuring instrument to the main control electrical box and connect each power output port.

[0074] The working principle of the static test equipment for verifying the reliability of the fuse safety mechanism of the present invention is as follows: After turning on all the power control buttons of the main control electrical box 5 and confirming that the speed-regulating motor 1 and the speed measuring instrument are powered, observe the speed measuring instrument adjusting the speed of the speed-regulating motor 1. The speed-regulating motor 1 drives the main shaft 16, and the main shaft transmits the torque to the turntable 25 through the flat key 13. The turntable 25 drives the fuse to make high-speed circular motion through the positioning block 12, the positioning rod 10, and the special fuse clamp 9. The balance block 24 located in the trapezoidal ring groove of the turntable 25 moves until a certain balance point, and the signal speed measuring plate 7, which is fastened to the edge of the turntable 25, begins to make circular motion, and is in the same period as the turntable 25. The light-detecting hole 6 is blocked, and the photosensitive speed measuring probe 3 receives the light-blocking signal of this frequency. The speed measuring instrument converts this signal into speed and displays it on the LED screen. When the speed measuring instrument displays a speed of 322 (r / min), the main control electrical box 5 provides a low-voltage current to the power line of the slip ring 15, and the slip ring 15 supplies power to the low-voltage electromagnet 8. At this point, under electromagnetic action, the radial safety pin moves to the reliable area where the safety is released. Under a centripetal acceleration of a ≈ 7g, the axial safety pin moves to the reliable area where the safety is released. After the electromechanical trigger fuse is released, a brief high voltage is generated, which passes through the collector ring 15 in the reverse direction and through the oscilloscope voltage probe, leaving a two-dimensional image of time and voltage on the oscilloscope display. The time unit is milliseconds (ms). When the time is within the range of 220 to 280 milliseconds, the fuse is considered qualified. After the test, the main control electrical box cuts off the motor power supply and switches to electromagnetic clutch 27 for power supply. The upper plate of electromagnetic clutch 27 rises and engages with the gasket 17, pushing the brake disc 26 to float. The brake disc 26 rubs against the rotating disc 25, and the rotating disc 25 decelerates until it stops due to the friction.

[0075] The static testing equipment for verifying the reliability of fuse insurance mechanisms of the present invention has several advantages. First, it is highly safe. After installation, all tests are conducted within a protective enclosure. Even in the event of an accident, objects ejected at high speed are isolated from the operators, preventing injury. After the test, the equipment can be stopped by pressing the brake button. Second, it is highly efficient. Existing equipment only has two detection positions. Based on the number of signal input interfaces on the oscilloscope, multiple test objects can be measured simultaneously by geometrically evenly distributing the fuze fixtures. Finally, the selected components are readily available and low in cost.

[0076] The above embodiments merely illustrate implementation methods of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A dedicated static test device for verifying the reliability of fuze insurance mechanisms, characterized in that: The device includes a support frame and a platform mounted on the support frame. A centrifugal mechanism, a clamping mechanism, a balancing mechanism, and a braking mechanism are mounted on the platform. The centrifugal mechanism includes a key, a connecting sleeve, a slip ring, a main shaft, and a gasket. The key connects the main shaft to the turntable of the balancing mechanism. The connecting sleeve connects to the main shaft and the key. The insulated enameled wire of the slip ring passes through a hole in the connecting sleeve and connects to a fuze signal wire. The gasket has a clearance fit with the brake disc of the braking mechanism. The gasket passes through the main shaft and is placed within a central hole in the platform. The clamping mechanism includes a low-voltage electromagnet, a fuze clamp, a positioning rod, a clamping plate, and a positioning block. The positioning block is connected to the turntable, the positioning rod and the clamping plate are both connected to the positioning block, the fuze clamp is connected to the positioning rod, the low-voltage electromagnet is connected to the fuze clamp, the balancing mechanism includes a balance block and the turntable, the balance block enters the trapezoidal slide rail of the turntable from the reserved position on the turntable, the braking mechanism includes the brake disc and the electromagnetic clutch, the electromagnetic clutch is located in the central hole of the platform, the platform is connected to the speed regulating motor, the electromagnetic clutch is connected to the platform, the bushing and the brake disc are interference-fitted, and the bushing, the brake disc and the electromagnetic clutch are assembled through the main shaft.

2. The dedicated static test equipment for verifying the reliability of fuse insurance mechanisms as described in claim 1, characterized in that: The turntable is equipped with a speed measuring signal plate, which is used to monitor the rotational speed of the turntable.

3. The dedicated static test equipment for verifying the reliability of fuse insurance mechanisms as described in claim 2, characterized in that: The static testing equipment includes a protective box covering the outside of the centrifugation mechanism. The protective box has a light-detecting hole and an observation window connected to the opening and positioning plate on the protective box.

4. The dedicated static test equipment for verifying the reliability of fuse insurance mechanisms as described in claim 3, characterized in that: The top of the protective box is a cover, which is connected to the side of the protective box via a common hinged hinge connector.

5. The dedicated static test equipment for verifying the reliability of fuse insurance mechanisms as described in claim 4, characterized in that: A main control electrical box mounting plate is installed on one side of the platform, and a main control electrical box is mounted on the main control electrical box mounting plate. A photosensitive speed measuring probe is mounted on the main control electrical box.

6. The dedicated static test equipment for verifying the reliability of fuse insurance mechanisms as described in claim 5, characterized in that: The fuse holder includes a base, a bracket at one end of the base, and a stop screw at the other end of the base.

7. The dedicated static test equipment for verifying the reliability of fuse insurance mechanisms as described in claim 6, characterized in that: Screws are installed on both sides of the bracket, and the screws are used to connect the simulated detonator and the fuse clamp.

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