Rocket sled cable brake test system and method

Abstract

The invention discloses a rocket sled cable brake test system and method, and relates to the field of liquid resistance brakes. The rocket sled cable brake test system comprises a hydraulic resistance system and a cable system. The hydraulic resistance system comprises two actuating cylinders arranged on the two sides of the sliding rail and two reset ropes penetrating through the two actuating cylinders respectively, each actuating cylinder is provided with at least one liquid inlet and outlet, buffer liquid is arranged in each actuating cylinder, and each reset rope is connected with at least one resistance piston located in the corresponding actuating cylinder. The cable system comprises two guide discs arranged on the two sides of the sliding rail, two steel wire ropes, two connecting pieces and an elastic cable, each guide disc is provided with at least one guide wheel, one ends of the two steel wire ropes are connected with the two reset ropes respectively, and the other ends of the two steel wire ropes penetrate through the guide wheels in the two corresponding guide discs respectively and then are connected with the two connecting pieces; the elastic cable penetrates through the two ends of the sliding rail to be connected with the two connecting pieces respectively. The rocket sled cable brake test system can bear the impact force of the rocket sled under large load and short-distance working conditions to realize safe and stable parking of the tackle so as to guarantee stable proceeding of the test.

Description

Technical Field

[0001] The present application relates to the field of liquid resistance brakes, and in particular, to a rocket sled cable brake test system and method. Background Art

[0002] A rocket skid is an aerodynamic test device that uses a rocket booster to propel a test object forward at high speed on a slide rail, and then uses a high-speed camera and other equipment to record data to analyze its aerodynamic performance.

[0003] During the rocket sled slide test, the speed of the test trolley is extremely high. In order to ensure that the trolley can brake safely and smoothly, a large load and short distance system is required to achieve braking to ensure the safety of the test. At present, the traditional cable brake in the rocket sled slide test only uses elastic ropes for arrestment, which cannot safely brake high-speed and high-impact tests.

[0004] Therefore, a large overload and short-distance braking method is needed to meet the needs of high-speed testing of rocket sled slides. Summary of the invention

[0005] The purpose of the present application is to provide a rocket sled cable brake test system and method, which can withstand the impact force of a rocket sled under large load and short distance conditions, smoothly convert the kinetic energy of the rocket sled's pulley into elastic potential energy and water kinetic energy, and achieve safe and stable parking of the pulley to ensure stable progress of the test.

[0006] This application is implemented as follows:

[0007] The present application provides a rocket sled cable brake test system, which includes a hydraulic resistance system and a cable system; the hydraulic resistance system includes two actuator cylinders respectively arranged on both sides of a slide rail and two reset ropes respectively passing through the two actuator cylinders, each actuator cylinder is provided with at least one fluid inlet and outlet port connected to its interior, a buffer is provided in the actuator cylinder, and the portion of each reset rope located in the actuator cylinder is connected to at least one resistance piston; the cable system includes two guide plates respectively arranged on both sides of the slide rail, two steel wire ropes, two connecting pieces and an elastic cable, at least one rotatable guide wheel is provided in the guide plate, one end of the two steel wire ropes is respectively connected to the two reset ropes, and the other end is respectively connected to one end of the two connecting pieces after passing through each guide wheel in the two corresponding guide plates, and the two ends of the elastic cable are respectively connected to the other end of the two connecting pieces after passing through the slide rail.

[0008] In some optional embodiments, the resistance piston includes a piston body and at least two annular piston disks spaced apart and sleeved on the piston body.

[0009] In some optional embodiments, the piston disc is bent at an angle of 10-20 degrees toward the direction close to the wire rope.

[0010] In some optional embodiments, a truncated cone-shaped buffer cavity is provided inside the actuator cylinder, and the inner diameter of the buffer cavity gradually decreases as it approaches the elastic cable.

[0011] In some optional embodiments, the two connecting members are respectively connected to a cutting section, and the two ends of the elastic cable are respectively connected to a connecting seat connected to the two cutting sections by bolts; when the pulley speed in the slide rail exceeds a preset value, the pulley impacts the elastic cable to break the cutting section.

[0012] In some optional embodiments, it also includes a slide rail bracket that is liftably disposed in the slide rail, and the middle portion of the elastic cable is disposed on the slide rail bracket.

[0013] In some optional embodiments, the actuator cylinder located on the same side of the slide rail is connected to the corresponding guide plate.

[0014] The present application also provides a rocket sled cable brake test method, which comprises the following steps:

[0015] An actuator cylinder and a guide disc are respectively arranged on both sides of the slide rail, each actuator cylinder is connected to a reset rope sliding through it, at least one rotatable guide wheel is arranged in the guide disc, and the part of each reset rope located in the actuator cylinder is connected to at least one resistance piston, and a buffer is arranged in the actuator cylinder. After the elastic cable passes through the slide rail, the two ends are respectively connected to two connecting pieces, and the two connecting pieces are respectively connected to two steel wire ropes, and the two steel wire ropes are respectively passed through the corresponding guide wheels in the two guide discs and then connected to the two reset ropes;

[0016] A rocket booster is used to push the pulley to move along the slide rail and hit the elastic cable, so that the elastic cable drives two connecting parts and two steel wire ropes to pull two reset ropes and corresponding resistance pistons to overcome the resistance of the buffer solution.

[0017] The beneficial effects of the present application are as follows: the rocket sled cable brake test system provided by the present application includes a hydraulic resistance system and a cable system; the hydraulic resistance system includes two actuators respectively arranged on both sides of the slide rail and two reset ropes respectively passing through the two actuators, each actuator is provided with at least one inlet and outlet port connected to the interior thereof, a buffer is provided in the actuator, and the portion of each reset rope located in the actuator is connected with at least one resistance piston; the cable system includes two guide plates respectively arranged on both sides of the slide rail, two steel wire ropes, two connectors and an elastic cable, at least one rotatable guide wheel is provided in the guide plate, one end of the two steel wire ropes is respectively connected to the two reset ropes, and the other end is respectively connected to one end of the two connectors after passing through each guide wheel in the two corresponding guide plates, and the two ends of the elastic cable are respectively connected to the other ends of the two connectors after passing through the slide rail. The rocket sled cable brake test system provided by the present application can withstand the impact force of the rocket sled under large load and short distance working conditions, and smoothly convert the kinetic energy of the pulley of the rocket sled into elastic potential energy and kinetic energy of water, so as to achieve safe and stable parking of the pulley to ensure stable test. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of the rocket sled cable brake test system provided in an embodiment of the present application installed on a slide rail;

[0020] Figure 2 A schematic cross-sectional view of the hydraulic resistance system in the rocket sled cable brake test system provided in an embodiment of the present application;

[0021] Figure 3 A schematic cross-sectional view of a resistance piston in a rocket sled cable brake test system provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of the partial cross-sectional structure of the rocket sled cable brake test system provided in an embodiment of the present application in which both ends of the elastic cable are connected to the cut-off sections of the two connecting parts through connecting seats.

[0023] In the figure: 100, hydraulic resistance system; 110, actuator; 120, reset rope; 130, inlet and outlet; 140, buffer; 150, resistance piston; 151, piston body; 152, piston disc; 160, buffer chamber; 200, cable system; 210, guide disc; 220, wire rope; 230, connector; 240, elastic cable; 250, guide wheel; 260, cut-off section; 270, connecting seat; 280, slide rail bracket; 300, slide rail. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0027] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0028] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] The features and performance of the rocket sled cable brake test system and method of the present application are further described in detail below in conjunction with the embodiments.

[0032] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the embodiment of the present application provides a rocket sled cable brake test system, which includes a hydraulic resistance system 100 and a cable system 200; wherein the hydraulic resistance system 100 includes two actuators 110 respectively arranged on both sides of a slide rail 300 and two reset ropes 120 respectively passing through the two actuators 110, a truncated cone-shaped buffer cavity 160 is provided inside the actuator cylinder 110, and the inner diameter of the buffer cavity 160 gradually decreases as it approaches the elastic cable 240, each actuator cylinder 110 is provided with two inlet and outlet ports 130 connected to the inside thereof, a buffer 140 is provided inside the actuator cylinder 110, and a resistance piston 150 is connected to the part of each reset rope 120 located inside the actuator cylinder 110;

[0033] The cable system 200 includes two guide plates 210, two steel wire ropes 220, two connecting members 230 and an elastic cable 240, which are respectively arranged on both sides of the slide rail 300. Two rotatable guide wheels 250 are connected in the guide plate 210. One end of the two steel wire ropes 220 is respectively connected to the two reset ropes 120, and the other end passes through the two guide wheels 250 in the two corresponding guide plates 210 and then connects to one end of the two connecting members 230. After the elastic cable 240 passes through the slide rail 300, both ends are respectively connected to the connecting seats 270 by bolts, and the other ends of the two connecting members 230 are respectively connected to the two connecting seats 270 by cutting nodes 260. When the pulley speed in the slide rail 300 exceeds the preset value, the pulley hits the elastic cable 240 to break the cutting node 260. The slide rail 300 is connected with a slide rail bracket 280 through a lifting bolt. When the lifting bolt rotates, it moves up and down along the axial direction and drives the connected slide rail bracket 280 to move up and down. The middle part of the elastic cable 240 is arranged on the slide rail bracket 280. The resistance piston 150 includes a piston body 151 and two annular piston discs 152 spaced apart and sleeved on the piston body 151. The two piston discs 152 are bent at an angle of 15 degrees toward the direction close to the wire rope 220, that is, any cross section of the piston disc 152 is arranged at 75 degrees to its axis. The actuator 110 located on the same side of the slide rail 300 is connected to the corresponding guide disc 210; the elastic cable 240 is made of aramid wire.

[0034] The embodiment of the present application also provides a rocket sled cable brake test method, which is performed using the rocket sled cable brake test system, and includes the following steps:

[0035] Step 1: Arrange the hydraulic resistance system 100 and the cable system 200; an actuator 110 and a guide plate 210 connected to the actuator 110 as a whole are respectively arranged on both sides of the slide rail 300, each actuator 110 is connected to a reset rope 120 sliding through it, and each reset rope 120 located in the actuator 110 is connected to a resistance piston 150, and the resistance piston 150 includes a piston body 151 and two annular piston plates 152 spaced apart and sleeved on the piston body 151, and the two piston plates 152 are bent 15 degrees toward the direction close to the wire rope 220 angular arrangement; two rotatable guide wheels 250 are connected in each guide disc 210, a buffer 140 is provided in the actuator cylinder 110, and the elastic cable 240 is passed through the slide rail 300, and the two ends are respectively connected to the connecting seats 270 by bolts, and the two connecting members 230 are respectively connected to the two connecting seats 270 through the cutting section 260, and the two connecting members 230 are respectively connected to the two steel wire ropes 220, and the two steel wire ropes 220 are respectively passed through the corresponding guide wheels 250 in the two guide discs 210 and then connected to the two reset ropes 120; in this embodiment, the buffer 140 is water.

[0036] Step 2: Conduct a rocket sled cable braking test; use a rocket booster to push the pulley along the slide rail 300 to hit the elastic cable 240, so that the elastic cable 240 drives the two connecting parts 230 and the two steel wire ropes 220 to pull the two reset ropes 120 and the corresponding resistance piston 150 to overcome the resistance of the buffer 140.

[0037] The rocket sled cable brake test system and method provided in the embodiment of the present application are provided with a hydraulic resistance system 100 and a cable system 200 on both sides of the slide rail 300, respectively. The hydraulic resistance system 100 includes an actuator cylinder 110 provided on both sides of the slide rail 300, and reset ropes 120 respectively pass through the actuator cylinder 110, and a buffer 140 is provided in the actuator cylinder 110. The part of each reset rope 120 located in the actuator cylinder 110 is connected to a resistance piston 150. The cable system 200 includes a guide plate 210, a steel wire rope 220, two connecting members 230 and an elastic cable 240 provided on both sides of the slide rail 300. The two ends of the elastic cable 240 pass through the two connecting members 230 and then pass through the slide rail 300. 30 connects two steel wire ropes 220, and the two steel wire ropes 220 pass through the guide wheel 250 in the guide plate 210 and then connect to the two reset ropes 120. When the rocket sled cable brake test is carried out, the pulley is first intercepted by the elastic cable 240 when braking. The impact force borne by the elastic cable 240 is transmitted to the resistance piston 150 connected to the two reset ropes 120 through the two connecting parts 230 and the two steel wire ropes 220, so that the two resistance pistons 150 overcome the resistance of the buffer 140 in the actuator cylinder 110 and move in the actuator cylinder 110, thereby smoothly converting the kinetic energy of the pulley into the elastic potential energy of the elastic cable 240 and the kinetic energy of the buffer 140 in the actuator cylinder 110, so as to achieve safe and stable parking of the pulley.

[0038] Among them, the resistance piston 150 includes a piston body 151 and two annular piston discs 152 spaced apart and sleeved on the piston body 151. The two piston discs 152 are bent at an angle of 15 degrees toward the direction close to the wire rope 220, which can not only improve the strength of the piston disc 152, but also form a resistance angle of about 15° with the buffer solution 140 in the moving direction after being subjected to force, ensuring that the two piston discs 152 of the resistance piston 150 can generate greater resistance when contacting the buffer solution 140 during braking, dispersing the instantaneous impact force during braking, and at the same time making it convenient for the operator to pull the reset rope 120 after use to drive the resistance piston 150 to move in the opposite direction and reset for subsequent testing.

[0039] A truncated cone-shaped buffer chamber 160 is provided inside the actuator 110. The inner diameter of the buffer chamber 160 gradually decreases as it approaches the elastic cable 240. When the resistance piston 150 moves along the actuator 110 during braking, the diameter of the buffer chamber 160 gradually decreases in the forward direction, thereby realizing a gradual increase in the resistance of the buffer 140 from small to large during braking, thereby reducing the instantaneous impact during braking. Two rotatable guide wheels 250 are connected inside the guide plate 210 to guide the wire rope 220, which can not only smoothly transition the force angle of the wire rope 220 but also effectively disperse the instantaneous impact. The other ends of the two connectors 230 are respectively connected to the two connecting seats 270 through the cut-off section 260; when the pulley speed in the slide rail 300 exceeds the preset value, the cut-off section 260 is broken when the pulley impacts the elastic cable 240. When the pulley speed exceeds the braking capacity of the system in extreme cases, the connector 230 is broken at the cut-off section 260 to ensure the safety of the brake system and the pulley structure.

[0040] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

Claims

1. A rocket sled cable brake test system, characterized in that: It includes a liquid resistance system and a cable system; the liquid resistance system includes two actuating cylinders respectively arranged on both sides of the slide rail and two reset ropes respectively passing through the two actuating cylinders, each of the actuating cylinders is provided with at least one liquid inlet and outlet port connected to its interior, a buffer is provided in the actuating cylinder, and the part of each reset rope located in the actuating cylinder is connected with at least one resistance piston; the cable system includes two guide plates respectively arranged on both sides of the slide rail, two steel wire ropes, two connecting pieces and an elastic cable, at least one rotatable guide wheel is provided in the guide plate, one end of the two steel wire ropes is respectively connected to the two reset ropes, and the other end is respectively connected to one end of the two connecting pieces after passing through each of the guide wheels in the two corresponding guide plates, and the two ends of the elastic cable are respectively connected to the other end of the two connecting pieces after passing through the slide rail.

2. The rocket sled cable brake test system according to claim 1, characterized in that: The resistance piston comprises a piston body and at least two annular piston discs which are spaced apart and sleeved on the piston body.

3. The rocket sled cable brake test system according to claim 2, characterized in that: The piston disc is bent at an angle of 10-20 degrees toward the direction close to the steel wire rope.

4. The rocket sled cable brake test system according to claim 1, characterized in that: A truncated cone-shaped buffer cavity is provided inside the actuating cylinder, and the inner diameter of the buffer cavity gradually decreases as it approaches the elastic cable.

5. The rocket sled cable brake test system according to claim 1, characterized in that: The two connecting members are respectively connected with a cutting section, and the two ends of the elastic cable are respectively connected with a connecting seat connected with the two cutting sections by bolts; when the speed of the pulley in the slide rail exceeds a preset value, the pulley impacts the elastic cable to break the cutting section.

6. The rocket sled cable brake test system according to claim 1, characterized in that: It also includes a slide rail bracket which is liftably arranged in the slide rail, and the middle part of the elastic cable is arranged on the slide rail bracket.

7. The rocket sled cable brake test system according to claim 1, characterized in that: The actuating cylinder located on the same side of the slide rail is connected to the corresponding guide plate.

8. A method for testing the braking of a rocket sled cable, characterized in that: It includes the following steps: An actuating cylinder and a guide disc are respectively arranged on both sides of the slide rail, each of the actuating cylinders is connected to a reset rope sliding through it, at least one rotatable guide wheel is arranged in the guide disc, and the part of each reset rope located in the actuating cylinder is connected to at least one resistance piston, and a buffer is arranged in the actuating cylinder. After the elastic cable passes through the slide rail, the two ends are respectively connected to two connecting pieces, and the two connecting pieces are respectively connected to two steel wire ropes, and the two steel wire ropes are respectively passed through the corresponding guide wheels in the two guide discs and then connected to the two reset ropes; A rocket booster is used to push the pulley to move along the slide rail and hit the elastic cable, so that the elastic cable drives the two connecting parts and the two steel wire ropes to pull the two reset ropes and the corresponding resistance pistons to overcome the resistance of the buffer.

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