Rocket sled cable brake test system and method

Abstract

A rocket sled cable brake test system and method relate to the field of liquid resistance brakes. The rocket sled cable brake test system includes a liquid resistance system and a cable system. The liquid resistance system includes two actuator cylinders arranged on both sides of the slide rail and two reset ropes respectively passing through the two actuator cylinders. Each actuator cylinder is provided with at least one liquid inlet and outlet port, and a buffer is provided in the actuator cylinder. Each reset rope is connected to at least one resistance piston located in the actuator cylinder. The cable system includes two guide plates arranged on both sides of the slide rail, two steel wire ropes, two connectors, and an elastic cable. The guide plate is provided with at least one guide wheel. One end of the two steel wire ropes is connected to the two reset ropes respectively, and the other end passes through the guide wheels in the two corresponding guide plates and then connects to the two connectors. The elastic cable passes through the slide rail and is connected to the two connectors at both ends. The rocket sled cable brake test system can withstand the impact force of the rocket sled under high load and short distance working conditions to achieve a safe and stable parking of the sled to ensure stable testing.

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 rocket boosters to propel a test object forward at high speed on a slide rail, and then uses high-speed cameras and other equipment to record data to analyze its aerodynamic performance.

[0003] During rocket sled slide tests, the extremely high speed of the test sled necessitates a high-load, short-distance braking system to ensure safe and stable braking. Currently, traditional cable brakes used in rocket sled slide tests rely solely on elastic ropes for arrestment, which is incapable of safely braking during high-speed, high-impact tests.

[0004] Therefore, a large overload, 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 this 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 working conditions, and smoothly convert the kinetic energy of the rocket sled's pulley into elastic potential energy and water kinetic energy, so as to achieve safe and smooth 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 liquid inlet and outlet port connected to its interior, a buffer solution 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 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 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 speed of the pulley in the slide rail exceeds a preset value, the pulley impacts the elastic cable to break the cutting section.

[0012] In some optional embodiments, a slide rail bracket is further included which is liftably arranged in the slide rail, and the middle portion of the elastic cable is arranged 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 method for testing a brake of a rocket sled cable, which comprises the following steps:

[0015] An actuating cylinder and a guide disc are respectively provided on both sides of the slide rail, each actuating cylinder is connected to a reset rope sliding through it, at least one rotatable guide wheel is provided in the guide disc, and the portion of each reset rope located in the actuating cylinder is connected to at least one resistance piston, a buffer is provided in the actuating cylinder, and after the elastic cable passes through the slide rail, the two ends are respectively connected to two connecting pieces, the two connecting pieces are respectively connected to two steel ropes, and the two steel 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 along the slide rail to hit the elastic cable, so that the elastic cable drives two connecting parts and two steel ropes to pull two reset ropes and corresponding resistance pistons to overcome the resistance of the buffer.

[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 actuator cylinders respectively arranged on both sides of the 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 discs 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 disc, one end of the two steel wire ropes is connected to the two reset ropes respectively, and the other end passes through each guide wheel in the two corresponding guide discs and then connects to one end of the two connectors, and the two ends of the elastic cable are respectively connected to the other end 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 a rocket sled under large load and short distance working conditions, and smoothly converts the kinetic energy of the rocket sled into elastic potential energy and kinetic energy of water, so as to achieve safe and stable parking of the sled to ensure stable test progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. 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 relevant drawings can be obtained based on these drawings without 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 the resistance piston in the rocket sled cable brake test system provided in an embodiment of the present application;

[0022] Figure 4 This is 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, liquid 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] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein 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 protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application 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, it does not require further definition or explanation in subsequent drawings.

[0027] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0029] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0030] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean 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, an 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. 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. The actuators 110 are internally provided with a truncated cone-shaped buffer cavity 160. The inner diameter of the buffer cavity 160 gradually decreases as it approaches the elastic cable 240. Each actuator 110 is provided with two fluid inlet and outlet ports 130 communicating with the interior thereof. A buffer 140 is provided in the actuator 110. The portion of each reset rope 120 located within the actuator 110 is connected to a resistance piston 150.

[0033] The cable system 200 includes two guide plates 210, two steel ropes 220, two connecting parts 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 to the guide plate 210. One end of the two steel ropes 220 is connected to the two reset ropes 120 respectively, 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 parts 230. After the elastic cable 240 passes through the slide rail 300, both ends are connected to the connecting seats 270 by bolts. The other ends of the two connecting parts 230 are connected to the two connecting seats 270 by cutting nodes 260 respectively. When the pulley speed in the slide rail 300 exceeds the preset value, the pulley hits the elastic cable 240, causing the cutting node 260 to break. The slide rail 300 is connected to a slide rail bracket 280 via a lifting bolt. Rotating the lifting bolt causes the slide rail bracket 280 to move axially and raise and lower. The middle portion of the elastic cable 240 is mounted on the slide rail bracket 280. The resistance piston 150 comprises a piston body 151 and two annular piston discs 152 spaced apart and sleeved onto the piston body 151. Both piston discs 152 are bent 15 degrees toward the wire rope 220, meaning any cross-section of the piston disc 152 is oriented 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 yarn.

[0034] The present application also provides a method for testing a rocket sled cable brake using the above-mentioned rocket sled cable brake testing system, including the following steps:

[0035] Step 1: Arrange the hydraulic resistance system 100 and the cable system 200; an actuator cylinder 110 and a guide plate 210 connected to the actuator cylinder 110 as a whole are respectively arranged on both sides of the slide rail 300. Each actuator cylinder 110 is connected to a reset rope 120 that slides through it. The portion of each reset rope 120 located in the actuator cylinder 110 is connected to a resistance piston 150. The resistance piston 150 includes a piston body 151 and two annular piston discs 152 spaced apart and sleeved on the piston body 151. Both piston discs 152 are bent 15 degrees toward the direction close to the wire rope 220. angular arrangement; two rotatable guide wheels 250 are connected to each guide disc 210, a buffer solution 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 parts 230 are respectively connected to the two connecting seats 270 through the cutting section 260, and the two connecting parts 230 are respectively connected to the two steel ropes 220, and the two steel 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 solution 140 is water.

[0036] Step 2: Conduct a braking test on the rocket sled cable; use the 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 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 a reset rope 120 passing through the actuator cylinder 110 respectively. A buffer 140 is provided in the actuator cylinder 110, and the portion 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 disc 210 and are then connected 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 through the two connectors 230 and the two steel wire ropes 220 to the resistance piston 150 connected to the two reset ropes 120, 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, thereby achieving safe and smooth 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. This not only improves the strength of the piston disc 152, but also forms 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 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 located within the actuator 110. The inner diameter of the buffer chamber 160 gradually decreases as it approaches the elastic cable 240. This allows the diameter of the buffer chamber 160 to gradually decrease as the resistance piston 150 moves along the actuator 110 during braking. This allows the resistance of the buffer 140 to increase smoothly from small to large during braking, reducing the impact of the braking moment. Two rotatable guide wheels 250 are connected to the guide plate 210 to guide the wire rope 220, smoothing the transition of the force applied to the wire rope 220 while effectively dissipating the impact of the momentary impact. The other ends of the two connectors 230 are connected to two connecting seats 270 via shear joints 260. When the pulley speed within the slide rail 300 exceeds a preset value, the shear joints 260 are broken when the pulley impacts the elastic cable 240. In extreme cases, when the pulley speed exceeds the system's braking capacity, the connector 230 breaks at the shear joints 260, ensuring the safety of the braking 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 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 making creative efforts are within the scope of protection of this 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 solution is provided in the actuating cylinder, and the part of each reset rope located in the actuating 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 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 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.

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 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 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 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 disc.

8. The rocket sled cable brake test method of the rocket sled cable brake test system according to claim 1, characterized in that: It includes the following steps: An actuating cylinder and a guide disc are respectively provided 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 provided in the guide disc, and the portion of each reset rope located in the actuating cylinder is connected to at least one resistance piston, a buffer is provided in the actuating cylinder, and after the elastic cable passes through the slide rail, the two ends are respectively connected to two connecting pieces, the two connecting pieces are respectively connected to two steel ropes, and the two steel 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 ropes to pull the two reset ropes and the corresponding resistance pistons to overcome the resistance of the buffer.

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